/*
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
 * 
 * Copyright 1997-2007 Sun Microsystems, Inc. All rights reserved.
 * 
 * The contents of this file are subject to the terms of either the GNU
 * General Public License Version 2 only ("GPL") or the Common Development
 * and Distribution License("CDDL") (collectively, the "License").  You
 * may not use this file except in compliance with the License. You can obtain
 * a copy of the License at https://glassfish.dev.java.net/public/CDDL+GPL.html
 * or glassfish/bootstrap/legal/LICENSE.txt.  See the License for the specific
 * language governing permissions and limitations under the License.
 * 
 * When distributing the software, include this License Header Notice in each
 * file and include the License file at glassfish/bootstrap/legal/LICENSE.txt.
 * Sun designates this particular file as subject to the "Classpath" exception
 * as provided by Sun in the GPL Version 2 section of the License file that
 * accompanied this code.  If applicable, add the following below the License
 * Header, with the fields enclosed by brackets [] replaced by your own
 * identifying information: "Portions Copyrighted [year]
 * [name of copyright owner]"
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 * 
 * If you wish your version of this file to be governed by only the CDDL or
 * only the GPL Version 2, indicate your decision by adding "[Contributor]
 * elects to include this software in this distribution under the [CDDL or GPL
 * Version 2] license."  If you don't indicate a single choice of license, a
 * recipient has the option to distribute your version of this file under
 * either the CDDL, the GPL Version 2 or to extend the choice of license to
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 * and therefore, elected the GPL Version 2 license, then the option applies
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 */
package com.sun.gjc.spi.base;

import java.sql.DatabaseMetaData;
import java.sql.SQLException;
import java.sql.ResultSet;
import java.sql.Connection;

/**
 * Abstract class for wrapping DatabaseMetaData<br>
 */
public abstract class DatabaseMetaDataWrapper implements DatabaseMetaData {

    protected DatabaseMetaData databaseMetaData = null;
    protected Connection connection = null;

    /**
     * Abstract class for wrapping DatabaseMetaData 
     * @param con Connection that is wrapped.<br>
     * @param metaData DatabaseMetaData that is wrapped <br>
     */
    public DatabaseMetaDataWrapper(Connection con, DatabaseMetaData metaData) {
        connection = con;
        databaseMetaData = metaData;
    }
    /**
     * Retrieves whether the current user can call all the procedures
     * returned by the method <code>getProcedures</code>.
     *
     * @return <code>true</code> if so; <code>false</code> otherwise
     * @throws java.sql.SQLException if a database access error occurs
     */
    public boolean allProceduresAreCallable() throws SQLException {
        return databaseMetaData.allProceduresAreCallable();
    }

    /**
     * Retrieves whether the current user can use all the tables returned
     * by the method <code>getTables</code> in a <code>SELECT</code>
     * statement.
     *
     * @return <code>true</code> if so; <code>false</code> otherwise
     * @throws java.sql.SQLException if a database access error occurs
     */
    public boolean allTablesAreSelectable() throws SQLException {
        return databaseMetaData.allTablesAreSelectable();
    }

    /**
     * Retrieves the URL for this DBMS.
     *
     * @return the URL for this DBMS or <code>null</code> if it cannot be
     *         generated
     * @throws java.sql.SQLException if a database access error occurs
     */
    public String getURL() throws SQLException {
        return databaseMetaData.getURL();
    }

    /**
     * Retrieves the user name as known to this database.
     *
     * @return the database user name
     * @throws java.sql.SQLException if a database access error occurs
     */
    public String getUserName() throws SQLException {
        return databaseMetaData.getUserName();
    }

    /**
     * Retrieves whether this database is in read-only mode.
     *
     * @return <code>true</code> if so; <code>false</code> otherwise
     * @throws java.sql.SQLException if a database access error occurs
     */
    public boolean isReadOnly() throws SQLException {
        return databaseMetaData.isReadOnly();
    }

    /**
     * Retrieves whether <code>NULL</code> values are sorted high.
     * Sorted high means that <code>NULL</code> values
     * sort higher than any other value in a domain.  In an ascending order,
     * if this method returns <code>true</code>,  <code>NULL</code> values
     * will appear at the end. By contrast, the method
     * <code>nullsAreSortedAtEnd</code> indicates whether <code>NULL</code> values
     * are sorted at the end regardless of sort order.
     *
     * @return <code>true</code> if so; <code>false</code> otherwise
     * @throws java.sql.SQLException if a database access error occurs
     */
    public boolean nullsAreSortedHigh() throws SQLException {
        return databaseMetaData.nullsAreSortedHigh();
    }

    /**
     * Retrieves whether <code>NULL</code> values are sorted low.
     * Sorted low means that <code>NULL</code> values
     * sort lower than any other value in a domain.  In an ascending order,
     * if this method returns <code>true</code>,  <code>NULL</code> values
     * will appear at the beginning. By contrast, the method
     * <code>nullsAreSortedAtStart</code> indicates whether <code>NULL</code> values
     * are sorted at the beginning regardless of sort order.
     *
     * @return <code>true</code> if so; <code>false</code> otherwise
     * @throws java.sql.SQLException if a database access error occurs
     */
    public boolean nullsAreSortedLow() throws SQLException {
        return databaseMetaData.nullsAreSortedLow();
    }

    /**
     * Retrieves whether <code>NULL</code> values are sorted at the start regardless
     * of sort order.
     *
     * @return <code>true</code> if so; <code>false</code> otherwise
     * @throws java.sql.SQLException if a database access error occurs
     */
    public boolean nullsAreSortedAtStart() throws SQLException {
        return databaseMetaData.nullsAreSortedAtStart();
    }

    /**
     * Retrieves whether <code>NULL</code> values are sorted at the end regardless of
     * sort order.
     *
     * @return <code>true</code> if so; <code>false</code> otherwise
     * @throws java.sql.SQLException if a database access error occurs
     */
    public boolean nullsAreSortedAtEnd() throws SQLException {
        return databaseMetaData.nullsAreSortedAtEnd();
    }

    /**
     * Retrieves the name of this database product.
     *
     * @return database product name
     * @throws java.sql.SQLException if a database access error occurs
     */
    public String getDatabaseProductName() throws SQLException {
        return databaseMetaData.getDatabaseProductName();
    }

    /**
     * Retrieves the version number of this database product.
     *
     * @return database version number
     * @throws java.sql.SQLException if a database access error occurs
     */
    public String getDatabaseProductVersion() throws SQLException {
        return databaseMetaData.getDatabaseProductVersion();
    }

    /**
     * Retrieves the name of this JDBC driver.
     *
     * @return JDBC driver name
     * @throws java.sql.SQLException if a database access error occurs
     */
    public String getDriverName() throws SQLException {
        return databaseMetaData.getDriverName();
    }

    /**
     * Retrieves the version number of this JDBC driver as a <code>String</code>.
     *
     * @return JDBC driver version
     * @throws java.sql.SQLException if a database access error occurs
     */
    public String getDriverVersion() throws SQLException {
        return databaseMetaData.getDriverVersion();
    }

    /**
     * Retrieves this JDBC driver's major version number.
     *
     * @return JDBC driver major version
     */
    public int getDriverMajorVersion() {
        return databaseMetaData.getDriverMajorVersion();
    }

    /**
     * Retrieves this JDBC driver's minor version number.
     *
     * @return JDBC driver minor version number
     */
    public int getDriverMinorVersion() {
        return databaseMetaData.getDriverMinorVersion();
    }

    /**
     * Retrieves whether this database stores tables in a local file.
     *
     * @return <code>true</code> if so; <code>false</code> otherwise
     * @throws java.sql.SQLException if a database access error occurs
     */
    public boolean usesLocalFiles() throws SQLException {
        return databaseMetaData.usesLocalFiles();
    }

    /**
     * Retrieves whether this database uses a file for each table.
     *
     * @return <code>true</code> if this database uses a local file for each table;
     *         <code>false</code> otherwise
     * @throws java.sql.SQLException if a database access error occurs
     */
    public boolean usesLocalFilePerTable() throws SQLException {
        return databaseMetaData.usesLocalFilePerTable();
    }

    /**
     * Retrieves whether this database treats mixed case unquoted SQL identifiers as
     * case sensitive and as a result stores them in mixed case.
     *
     * @return <code>true</code> if so; <code>false</code> otherwise
     * @throws java.sql.SQLException if a database access error occurs
     */
    public boolean supportsMixedCaseIdentifiers() throws SQLException {
        return databaseMetaData.supportsMixedCaseIdentifiers();
    }

    /**
     * Retrieves whether this database treats mixed case unquoted SQL identifiers as
     * case insensitive and stores them in upper case.
     *
     * @return <code>true</code> if so; <code>false</code> otherwise
     * @throws java.sql.SQLException if a database access error occurs
     */
    public boolean storesUpperCaseIdentifiers() throws SQLException {
        return databaseMetaData.storesUpperCaseIdentifiers();
    }

    /**
     * Retrieves whether this database treats mixed case unquoted SQL identifiers as
     * case insensitive and stores them in lower case.
     *
     * @return <code>true</code> if so; <code>false</code> otherwise
     * @throws java.sql.SQLException if a database access error occurs
     */
    public boolean storesLowerCaseIdentifiers() throws SQLException {
        return databaseMetaData.storesLowerCaseIdentifiers();
    }

    /**
     * Retrieves whether this database treats mixed case unquoted SQL identifiers as
     * case insensitive and stores them in mixed case.
     *
     * @return <code>true</code> if so; <code>false</code> otherwise
     * @throws java.sql.SQLException if a database access error occurs
     */
    public boolean storesMixedCaseIdentifiers() throws SQLException {
        return databaseMetaData.storesMixedCaseIdentifiers();
    }

    /**
     * Retrieves whether this database treats mixed case quoted SQL identifiers as
     * case sensitive and as a result stores them in mixed case.
     *
     * @return <code>true</code> if so; <code>false</code> otherwise
     * @throws java.sql.SQLException if a database access error occurs
     */
    public boolean supportsMixedCaseQuotedIdentifiers() throws SQLException {
        return databaseMetaData.supportsMixedCaseQuotedIdentifiers();
    }

    /**
     * Retrieves whether this database treats mixed case quoted SQL identifiers as
     * case insensitive and stores them in upper case.
     *
     * @return <code>true</code> if so; <code>false</code> otherwise
     * @throws java.sql.SQLException if a database access error occurs
     */
    public boolean storesUpperCaseQuotedIdentifiers() throws SQLException {
        return databaseMetaData.storesUpperCaseQuotedIdentifiers();
    }

    /**
     * Retrieves whether this database treats mixed case quoted SQL identifiers as
     * case insensitive and stores them in lower case.
     *
     * @return <code>true</code> if so; <code>false</code> otherwise
     * @throws java.sql.SQLException if a database access error occurs
     */
    public boolean storesLowerCaseQuotedIdentifiers() throws SQLException {
        return databaseMetaData.storesLowerCaseQuotedIdentifiers();
    }

    /**
     * Retrieves whether this database treats mixed case quoted SQL identifiers as
     * case insensitive and stores them in mixed case.
     *
     * @return <code>true</code> if so; <code>false</code> otherwise
     * @throws java.sql.SQLException if a database access error occurs
     */
    public boolean storesMixedCaseQuotedIdentifiers() throws SQLException {
        return databaseMetaData.storesMixedCaseQuotedIdentifiers();
    }

    /**
     * Retrieves the string used to quote SQL identifiers.
     * This method returns a space " " if identifier quoting is not supported.
     *
     * @return the quoting string or a space if quoting is not supported
     * @throws java.sql.SQLException if a database access error occurs
     */
    public String getIdentifierQuoteString() throws SQLException {
        return databaseMetaData.getIdentifierQuoteString();
    }

    /**
     * Retrieves a comma-separated list of all of this database's SQL keywords
     * that are NOT also SQL92 keywords.
     *
     * @return the list of this database's keywords that are not also
     *         SQL92 keywords
     * @throws java.sql.SQLException if a database access error occurs
     */
    public String getSQLKeywords() throws SQLException {
        return databaseMetaData.getSQLKeywords();
    }

    /**
     * Retrieves a comma-separated list of math functions available with
     * this database.  These are the Open /Open CLI math function names used in
     * the JDBC function escape clause.
     *
     * @return the list of math functions supported by this database
     * @throws java.sql.SQLException if a database access error occurs
     */
    public String getNumericFunctions() throws SQLException {
        return databaseMetaData.getNumericFunctions();
    }

    /**
     * Retrieves a comma-separated list of string functions available with
     * this database.  These are the  Open Group CLI string function names used
     * in the JDBC function escape clause.
     *
     * @return the list of string functions supported by this database
     * @throws java.sql.SQLException if a database access error occurs
     */
    public String getStringFunctions() throws SQLException {
        return databaseMetaData.getStringFunctions();
    }

    /**
     * Retrieves a comma-separated list of system functions available with
     * this database.  These are the  Open Group CLI system function names used
     * in the JDBC function escape clause.
     *
     * @return a list of system functions supported by this database
     * @throws java.sql.SQLException if a database access error occurs
     */
    public String getSystemFunctions() throws SQLException {
        return databaseMetaData.getSystemFunctions();
    }

    /**
     * Retrieves a comma-separated list of the time and date functions available
     * with this database.
     *
     * @return the list of time and date functions supported by this database
     * @throws java.sql.SQLException if a database access error occurs
     */
    public String getTimeDateFunctions() throws SQLException {
        return databaseMetaData.getTimeDateFunctions();
    }

    /**
     * Retrieves the string that can be used to escape wildcard characters.
     * This is the string that can be used to escape '_' or '%' in
     * the catalog search parameters that are a pattern (and therefore use one
     * of the wildcard characters).
     * <p/>
     * <P>The '_' character represents any single character;
     * the '%' character represents any sequence of zero or
     * more characters.
     *
     * @return the string used to escape wildcard characters
     * @throws java.sql.SQLException if a database access error occurs
     */
    public String getSearchStringEscape() throws SQLException {
        return databaseMetaData.getSearchStringEscape();
    }

    /**
     * Retrieves all the "extra" characters that can be used in unquoted
     * identifier names (those beyond a-z, A-Z, 0-9 and _).
     *
     * @return the string containing the extra characters
     * @throws java.sql.SQLException if a database access error occurs
     */
    public String getExtraNameCharacters() throws SQLException {
        return databaseMetaData.getExtraNameCharacters();
    }

    /**
     * Retrieves whether this database supports <code>ALTER TABLE</code>
     * with add column.
     *
     * @return <code>true</code> if so; <code>false</code> otherwise
     * @throws java.sql.SQLException if a database access error occurs
     */
    public boolean supportsAlterTableWithAddColumn() throws SQLException {
        return databaseMetaData.supportsAlterTableWithAddColumn();
    }

    /**
     * Retrieves whether this database supports <code>ALTER TABLE</code>
     * with drop column.
     *
     * @return <code>true</code> if so; <code>false</code> otherwise
     * @throws java.sql.SQLException if a database access error occurs
     */
    public boolean supportsAlterTableWithDropColumn() throws SQLException {
        return databaseMetaData.supportsAlterTableWithDropColumn();
    }

    /**
     * Retrieves whether this database supports column aliasing.
     * <p/>
     * <P>If so, the SQL AS clause can be used to provide names for
     * computed columns or to provide alias names for columns as
     * required.
     *
     * @return <code>true</code> if so; <code>false</code> otherwise
     * @throws java.sql.SQLException if a database access error occurs
     */
    public boolean supportsColumnAliasing() throws SQLException {
        return databaseMetaData.supportsColumnAliasing();
    }

    /**
     * Retrieves whether this database supports concatenations between
     * <code>NULL</code> and non-<code>NULL</code> values being
     * <code>NULL</code>.
     *
     * @return <code>true</code> if so; <code>false</code> otherwise
     * @throws java.sql.SQLException if a database access error occurs
     */
    public boolean nullPlusNonNullIsNull() throws SQLException {
        return databaseMetaData.nullPlusNonNullIsNull();
    }

    /**
     * Retrieves whether this database supports the <code>CONVERT</code>
     * function between SQL types.
     *
     * @return <code>true</code> if so; <code>false</code> otherwise
     * @throws java.sql.SQLException if a database access error occurs
     */
    public boolean supportsConvert() throws SQLException {
        return databaseMetaData.supportsConvert();
    }

    /**
     * Retrieves whether this database supports the <code>CONVERT</code>
     * for two given SQL types.
     *
     * @param fromType the type to convert from; one of the type codes from
     *                 the class <code>java.sql.Types</code>
     * @param toType   the type to convert to; one of the type codes from
     *                 the class <code>java.sql.Types</code>
     * @return <code>true</code> if so; <code>false</code> otherwise
     * @throws java.sql.SQLException if a database access error occurs
     * @see java.sql.Types
     */
    public boolean supportsConvert(int fromType, int toType) throws SQLException {
        return databaseMetaData.supportsConvert(fromType, toType);
    }

    /**
     * Retrieves whether this database supports table correlation names.
     *
     * @return <code>true</code> if so; <code>false</code> otherwise
     * @throws java.sql.SQLException if a database access error occurs
     */
    public boolean supportsTableCorrelationNames() throws SQLException {
        return databaseMetaData.supportsTableCorrelationNames();
    }

    /**
     * Retrieves whether, when table correlation names are supported, they
     * are restricted to being different from the names of the tables.
     *
     * @return <code>true</code> if so; <code>false</code> otherwise
     * @throws java.sql.SQLException if a database access error occurs
     */
    public boolean supportsDifferentTableCorrelationNames() throws SQLException {
        return databaseMetaData.supportsDifferentTableCorrelationNames();
    }

    /**
     * Retrieves whether this database supports expressions in
     * <code>ORDER BY</code> lists.
     *
     * @return <code>true</code> if so; <code>false</code> otherwise
     * @throws java.sql.SQLException if a database access error occurs
     */
    public boolean supportsExpressionsInOrderBy() throws SQLException {
        return databaseMetaData.supportsExpressionsInOrderBy();
    }

    /**
     * Retrieves whether this database supports using a column that is
     * not in the <code>SELECT</code> statement in an
     * <code>ORDER BY</code> clause.
     *
     * @return <code>true</code> if so; <code>false</code> otherwise
     * @throws java.sql.SQLException if a database access error occurs
     */
    public boolean supportsOrderByUnrelated() throws SQLException {
        return databaseMetaData.supportsOrderByUnrelated();
    }

    /**
     * Retrieves whether this database supports some form of
     * <code>GROUP BY</code> clause.
     *
     * @return <code>true</code> if so; <code>false</code> otherwise
     * @throws java.sql.SQLException if a database access error occurs
     */
    public boolean supportsGroupBy() throws SQLException {
        return databaseMetaData.supportsGroupBy();
    }

    /**
     * Retrieves whether this database supports using a column that is
     * not in the <code>SELECT</code> statement in a
     * <code>GROUP BY</code> clause.
     *
     * @return <code>true</code> if so; <code>false</code> otherwise
     * @throws java.sql.SQLException if a database access error occurs
     */
    public boolean supportsGroupByUnrelated() throws SQLException {
        return databaseMetaData.supportsGroupByUnrelated();
    }

    /**
     * Retrieves whether this database supports using columns not included in
     * the <code>SELECT</code> statement in a <code>GROUP BY</code> clause
     * provided that all of the columns in the <code>SELECT</code> statement
     * are included in the <code>GROUP BY</code> clause.
     *
     * @return <code>true</code> if so; <code>false</code> otherwise
     * @throws java.sql.SQLException if a database access error occurs
     */
    public boolean supportsGroupByBeyondSelect() throws SQLException {
        return databaseMetaData.supportsGroupByBeyondSelect();
    }

    /**
     * Retrieves whether this database supports specifying a
     * <code>LIKE</code> escape clause.
     *
     * @return <code>true</code> if so; <code>false</code> otherwise
     * @throws java.sql.SQLException if a database access error occurs
     */
    public boolean supportsLikeEscapeClause() throws SQLException {
        return databaseMetaData.supportsLikeEscapeClause();
    }

    /**
     * Retrieves whether this database supports getting multiple
     * <code>ResultSet</code> objects from a single call to the
     * method <code>execute</code>.
     *
     * @return <code>true</code> if so; <code>false</code> otherwise
     * @throws java.sql.SQLException if a database access error occurs
     */
    public boolean supportsMultipleResultSets() throws SQLException {
        return databaseMetaData.supportsMultipleResultSets();
    }

    /**
     * Retrieves whether this database allows having multiple
     * transactions open at once (on different connections).
     *
     * @return <code>true</code> if so; <code>false</code> otherwise
     * @throws java.sql.SQLException if a database access error occurs
     */
    public boolean supportsMultipleTransactions() throws SQLException {
        return databaseMetaData.supportsMultipleTransactions();
    }

    /**
     * Retrieves whether columns in this database may be defined as non-nullable.
     *
     * @return <code>true</code> if so; <code>false</code> otherwise
     * @throws java.sql.SQLException if a database access error occurs
     */
    public boolean supportsNonNullableColumns() throws SQLException {
        return databaseMetaData.supportsNonNullableColumns();
    }

    /**
     * Retrieves whether this database supports the ODBC Minimum SQL grammar.
     *
     * @return <code>true</code> if so; <code>false</code> otherwise
     * @throws java.sql.SQLException if a database access error occurs
     */
    public boolean supportsMinimumSQLGrammar() throws SQLException {
        return databaseMetaData.supportsMinimumSQLGrammar();
    }

    /**
     * Retrieves whether this database supports the ODBC Core SQL grammar.
     *
     * @return <code>true</code> if so; <code>false</code> otherwise
     * @throws java.sql.SQLException if a database access error occurs
     */
    public boolean supportsCoreSQLGrammar() throws SQLException {
        return databaseMetaData.supportsCoreSQLGrammar();
    }

    /**
     * Retrieves whether this database supports the ODBC Extended SQL grammar.
     *
     * @return <code>true</code> if so; <code>false</code> otherwise
     * @throws java.sql.SQLException if a database access error occurs
     */
    public boolean supportsExtendedSQLGrammar() throws SQLException {
        return databaseMetaData.supportsExtendedSQLGrammar();
    }

    /**
     * Retrieves whether this database supports the ANSI92 entry level SQL
     * grammar.
     *
     * @return <code>true</code> if so; <code>false</code> otherwise
     * @throws java.sql.SQLException if a database access error occurs
     */
    public boolean supportsANSI92EntryLevelSQL() throws SQLException {
        return databaseMetaData.supportsANSI92EntryLevelSQL();
    }

    /**
     * Retrieves whether this database supports the ANSI92 intermediate SQL grammar supported.
     *
     * @return <code>true</code> if so; <code>false</code> otherwise
     * @throws java.sql.SQLException if a database access error occurs
     */
    public boolean supportsANSI92IntermediateSQL() throws SQLException {
        return databaseMetaData.supportsANSI92IntermediateSQL();
    }

    /**
     * Retrieves whether this database supports the ANSI92 full SQL grammar supported.
     *
     * @return <code>true</code> if so; <code>false</code> otherwise
     * @throws java.sql.SQLException if a database access error occurs
     */
    public boolean supportsANSI92FullSQL() throws SQLException {
        return databaseMetaData.supportsANSI92FullSQL();
    }

    /**
     * Retrieves whether this database supports the SQL Integrity
     * Enhancement Facility.
     *
     * @return <code>true</code> if so; <code>false</code> otherwise
     * @throws java.sql.SQLException if a database access error occurs
     */
    public boolean supportsIntegrityEnhancementFacility() throws SQLException {
        return databaseMetaData.supportsIntegrityEnhancementFacility();
    }

    /**
     * Retrieves whether this database supports some form of outer join.
     *
     * @return <code>true</code> if so; <code>false</code> otherwise
     * @throws java.sql.SQLException if a database access error occurs
     */
    public boolean supportsOuterJoins() throws SQLException {
        return databaseMetaData.supportsOuterJoins();
    }

    /**
     * Retrieves whether this database supports full nested outer joins.
     *
     * @return <code>true</code> if so; <code>false</code> otherwise
     * @throws java.sql.SQLException if a database access error occurs
     */
    public boolean supportsFullOuterJoins() throws SQLException {
        return databaseMetaData.supportsFullOuterJoins();
    }

    /**
     * Retrieves whether this database provides limited support for outer
     * joins.  (This will be <code>true</code> if the method
     * <code>supportsFullOuterJoins</code> returns <code>true</code>).
     *
     * @return <code>true</code> if so; <code>false</code> otherwise
     * @throws java.sql.SQLException if a database access error occurs
     */
    public boolean supportsLimitedOuterJoins() throws SQLException {
        return databaseMetaData.supportsLimitedOuterJoins();
    }

    /**
     * Retrieves the database vendor's preferred term for "schema".
     *
     * @return the vendor term for "schema"
     * @throws java.sql.SQLException if a database access error occurs
     */
    public String getSchemaTerm() throws SQLException {
        return databaseMetaData.getSchemaTerm();
    }

    /**
     * Retrieves the database vendor's preferred term for "procedure".
     *
     * @return the vendor term for "procedure"
     * @throws java.sql.SQLException if a database access error occurs
     */
    public String getProcedureTerm() throws SQLException {
        return databaseMetaData.getProcedureTerm();
    }

    /**
     * Retrieves the database vendor's preferred term for "catalog".
     *
     * @return the vendor term for "catalog"
     * @throws java.sql.SQLException if a database access error occurs
     */
    public String getCatalogTerm() throws SQLException {
        return databaseMetaData.getCatalogTerm();
    }

    /**
     * Retrieves whether a catalog appears at the start of a fully qualified
     * table name.  If not, the catalog appears at the end.
     *
     * @return <code>true</code> if the catalog name appears at the beginning
     *         of a fully qualified table name; <code>false</code> otherwise
     * @throws java.sql.SQLException if a database access error occurs
     */
    public boolean isCatalogAtStart() throws SQLException {
        return databaseMetaData.isCatalogAtStart();
    }

    /**
     * Retrieves the <code>String</code> that this database uses as the
     * separator between a catalog and table name.
     *
     * @return the separator string
     * @throws java.sql.SQLException if a database access error occurs
     */
    public String getCatalogSeparator() throws SQLException {
        return databaseMetaData.getCatalogSeparator();
    }

    /**
     * Retrieves whether a schema name can be used in a data manipulation statement.
     *
     * @return <code>true</code> if so; <code>false</code> otherwise
     * @throws java.sql.SQLException if a database access error occurs
     */
    public boolean supportsSchemasInDataManipulation() throws SQLException {
        return databaseMetaData.supportsSchemasInDataManipulation();
    }

    /**
     * Retrieves whether a schema name can be used in a procedure call statement.
     *
     * @return <code>true</code> if so; <code>false</code> otherwise
     * @throws java.sql.SQLException if a database access error occurs
     */
    public boolean supportsSchemasInProcedureCalls() throws SQLException {
        return databaseMetaData.supportsSchemasInProcedureCalls();
    }

    /**
     * Retrieves whether a schema name can be used in a table definition statement.
     *
     * @return <code>true</code> if so; <code>false</code> otherwise
     * @throws java.sql.SQLException if a database access error occurs
     */
    public boolean supportsSchemasInTableDefinitions() throws SQLException {
        return databaseMetaData.supportsSchemasInTableDefinitions();
    }

    /**
     * Retrieves whether a schema name can be used in an index definition statement.
     *
     * @return <code>true</code> if so; <code>false</code> otherwise
     * @throws java.sql.SQLException if a database access error occurs
     */
    public boolean supportsSchemasInIndexDefinitions() throws SQLException {
        return databaseMetaData.supportsSchemasInIndexDefinitions();
    }

    /**
     * Retrieves whether a schema name can be used in a privilege definition statement.
     *
     * @return <code>true</code> if so; <code>false</code> otherwise
     * @throws java.sql.SQLException if a database access error occurs
     */
    public boolean supportsSchemasInPrivilegeDefinitions() throws SQLException {
        return databaseMetaData.supportsSchemasInPrivilegeDefinitions();
    }

    /**
     * Retrieves whether a catalog name can be used in a data manipulation statement.
     *
     * @return <code>true</code> if so; <code>false</code> otherwise
     * @throws java.sql.SQLException if a database access error occurs
     */
    public boolean supportsCatalogsInDataManipulation() throws SQLException {
        return databaseMetaData.supportsCatalogsInDataManipulation();
    }

    /**
     * Retrieves whether a catalog name can be used in a procedure call statement.
     *
     * @return <code>true</code> if so; <code>false</code> otherwise
     * @throws java.sql.SQLException if a database access error occurs
     */
    public boolean supportsCatalogsInProcedureCalls() throws SQLException {
        return databaseMetaData.supportsCatalogsInProcedureCalls();
    }

    /**
     * Retrieves whether a catalog name can be used in a table definition statement.
     *
     * @return <code>true</code> if so; <code>false</code> otherwise
     * @throws java.sql.SQLException if a database access error occurs
     */
    public boolean supportsCatalogsInTableDefinitions() throws SQLException {
        return databaseMetaData.supportsCatalogsInTableDefinitions();
    }

    /**
     * Retrieves whether a catalog name can be used in an index definition statement.
     *
     * @return <code>true</code> if so; <code>false</code> otherwise
     * @throws java.sql.SQLException if a database access error occurs
     */
    public boolean supportsCatalogsInIndexDefinitions() throws SQLException {
        return databaseMetaData.supportsCatalogsInIndexDefinitions();
    }

    /**
     * Retrieves whether a catalog name can be used in a privilege definition statement.
     *
     * @return <code>true</code> if so; <code>false</code> otherwise
     * @throws java.sql.SQLException if a database access error occurs
     */
    public boolean supportsCatalogsInPrivilegeDefinitions() throws SQLException {
        return databaseMetaData.supportsCatalogsInPrivilegeDefinitions();
    }

    /**
     * Retrieves whether this database supports positioned <code>DELETE</code>
     * statements.
     *
     * @return <code>true</code> if so; <code>false</code> otherwise
     * @throws java.sql.SQLException if a database access error occurs
     */
    public boolean supportsPositionedDelete() throws SQLException {
        return databaseMetaData.supportsPositionedDelete();
    }

    /**
     * Retrieves whether this database supports positioned <code>UPDATE</code>
     * statements.
     *
     * @return <code>true</code> if so; <code>false</code> otherwise
     * @throws java.sql.SQLException if a database access error occurs
     */
    public boolean supportsPositionedUpdate() throws SQLException {
        return databaseMetaData.supportsPositionedUpdate();
    }

    /**
     * Retrieves whether this database supports <code>SELECT FOR UPDATE</code>
     * statements.
     *
     * @return <code>true</code> if so; <code>false</code> otherwise
     * @throws java.sql.SQLException if a database access error occurs
     */
    public boolean supportsSelectForUpdate() throws SQLException {
        return databaseMetaData.supportsSelectForUpdate();
    }

    /**
     * Retrieves whether this database supports stored procedure calls
     * that use the stored procedure escape syntax.
     *
     * @return <code>true</code> if so; <code>false</code> otherwise
     * @throws java.sql.SQLException if a database access error occurs
     */
    public boolean supportsStoredProcedures() throws SQLException {
        return databaseMetaData.supportsStoredProcedures();
    }

    /**
     * Retrieves whether this database supports subqueries in comparison
     * expressions.
     *
     * @return <code>true</code> if so; <code>false</code> otherwise
     * @throws java.sql.SQLException if a database access error occurs
     */
    public boolean supportsSubqueriesInComparisons() throws SQLException {
        return databaseMetaData.supportsSubqueriesInComparisons();
    }

    /**
     * Retrieves whether this database supports subqueries in
     * <code>EXISTS</code> expressions.
     *
     * @return <code>true</code> if so; <code>false</code> otherwise
     * @throws java.sql.SQLException if a database access error occurs
     */
    public boolean supportsSubqueriesInExists() throws SQLException {
        return databaseMetaData.supportsSubqueriesInExists();
    }

    /**
     * Retrieves whether this database supports subqueries in
     * <code>IN</code> statements.
     *
     * @return <code>true</code> if so; <code>false</code> otherwise
     * @throws java.sql.SQLException if a database access error occurs
     */
    public boolean supportsSubqueriesInIns() throws SQLException {
        return databaseMetaData.supportsSubqueriesInIns();
    }

    /**
     * Retrieves whether this database supports subqueries in quantified
     * expressions.
     *
     * @return <code>true</code> if so; <code>false</code> otherwise
     * @throws java.sql.SQLException if a database access error occurs
     */
    public boolean supportsSubqueriesInQuantifieds() throws SQLException {
        return databaseMetaData.supportsSubqueriesInQuantifieds();
    }

    /**
     * Retrieves whether this database supports correlated subqueries.
     *
     * @return <code>true</code> if so; <code>false</code> otherwise
     * @throws java.sql.SQLException if a database access error occurs
     */
    public boolean supportsCorrelatedSubqueries() throws SQLException {
        return databaseMetaData.supportsCorrelatedSubqueries();
    }

    /**
     * Retrieves whether this database supports SQL <code>UNION</code>.
     *
     * @return <code>true</code> if so; <code>false</code> otherwise
     * @throws java.sql.SQLException if a database access error occurs
     */
    public boolean supportsUnion() throws SQLException {
        return databaseMetaData.supportsUnion();
    }

    /**
     * Retrieves whether this database supports SQL <code>UNION ALL</code>.
     *
     * @return <code>true</code> if so; <code>false</code> otherwise
     * @throws java.sql.SQLException if a database access error occurs
     */
    public boolean supportsUnionAll() throws SQLException {
        return databaseMetaData.supportsUnionAll();
    }

    /**
     * Retrieves whether this database supports keeping cursors open
     * across commits.
     *
     * @return <code>true</code> if cursors always remain open;
     *         <code>false</code> if they might not remain open
     * @throws java.sql.SQLException if a database access error occurs
     */
    public boolean supportsOpenCursorsAcrossCommit() throws SQLException {
        return databaseMetaData.supportsOpenCursorsAcrossCommit();
    }

    /**
     * Retrieves whether this database supports keeping cursors open
     * across rollbacks.
     *
     * @return <code>true</code> if cursors always remain open;
     *         <code>false</code> if they might not remain open
     * @throws java.sql.SQLException if a database access error occurs
     */
    public boolean supportsOpenCursorsAcrossRollback() throws SQLException {
        return databaseMetaData.supportsOpenCursorsAcrossRollback();
    }

    /**
     * Retrieves whether this database supports keeping statements open
     * across commits.
     *
     * @return <code>true</code> if statements always remain open;
     *         <code>false</code> if they might not remain open
     * @throws java.sql.SQLException if a database access error occurs
     */
    public boolean supportsOpenStatementsAcrossCommit() throws SQLException {
        return databaseMetaData.supportsOpenStatementsAcrossCommit();
    }

    /**
     * Retrieves whether this database supports keeping statements open
     * across rollbacks.
     *
     * @return <code>true</code> if statements always remain open;
     *         <code>false</code> if they might not remain open
     * @throws java.sql.SQLException if a database access error occurs
     */
    public boolean supportsOpenStatementsAcrossRollback() throws SQLException {
        return databaseMetaData.supportsOpenStatementsAcrossRollback();
    }

    /**
     * Retrieves the maximum number of hex characters this database allows in an
     * inline binary literal.
     *
     * @return max the maximum length (in hex characters) for a binary literal;
     *         a result of zero means that there is no limit or the limit
     *         is not known
     * @throws java.sql.SQLException if a database access error occurs
     */
    public int getMaxBinaryLiteralLength() throws SQLException {
        return databaseMetaData.getMaxBinaryLiteralLength();
    }

    /**
     * Retrieves the maximum number of characters this database allows
     * for a character literal.
     *
     * @return the maximum number of characters allowed for a character literal;
     *         a result of zero means that there is no limit or the limit is
     *         not known
     * @throws java.sql.SQLException if a database access error occurs
     */
    public int getMaxCharLiteralLength() throws SQLException {
        return databaseMetaData.getMaxCharLiteralLength();
    }

    /**
     * Retrieves the maximum number of characters this database allows
     * for a column name.
     *
     * @return the maximum number of characters allowed for a column name;
     *         a result of zero means that there is no limit or the limit
     *         is not known
     * @throws java.sql.SQLException if a database access error occurs
     */
    public int getMaxColumnNameLength() throws SQLException {
        return databaseMetaData.getMaxColumnNameLength();
    }

    /**
     * Retrieves the maximum number of columns this database allows in a
     * <code>GROUP BY</code> clause.
     *
     * @return the maximum number of columns allowed;
     *         a result of zero means that there is no limit or the limit
     *         is not known
     * @throws java.sql.SQLException if a database access error occurs
     */
    public int getMaxColumnsInGroupBy() throws SQLException {
        return databaseMetaData.getMaxColumnsInGroupBy();
    }

    /**
     * Retrieves the maximum number of columns this database allows in an index.
     *
     * @return the maximum number of columns allowed;
     *         a result of zero means that there is no limit or the limit
     *         is not known
     * @throws java.sql.SQLException if a database access error occurs
     */
    public int getMaxColumnsInIndex() throws SQLException {
        return databaseMetaData.getMaxColumnsInIndex();
    }

    /**
     * Retrieves the maximum number of columns this database allows in an
     * <code>ORDER BY</code> clause.
     *
     * @return the maximum number of columns allowed;
     *         a result of zero means that there is no limit or the limit
     *         is not known
     * @throws java.sql.SQLException if a database access error occurs
     */
    public int getMaxColumnsInOrderBy() throws SQLException {
        return databaseMetaData.getMaxColumnsInOrderBy();
    }

    /**
     * Retrieves the maximum number of columns this database allows in a
     * <code>SELECT</code> list.
     *
     * @return the maximum number of columns allowed;
     *         a result of zero means that there is no limit or the limit
     *         is not known
     * @throws java.sql.SQLException if a database access error occurs
     */
    public int getMaxColumnsInSelect() throws SQLException {
        return databaseMetaData.getMaxColumnsInSelect();
    }

    /**
     * Retrieves the maximum number of columns this database allows in a table.
     *
     * @return the maximum number of columns allowed;
     *         a result of zero means that there is no limit or the limit
     *         is not known
     * @throws java.sql.SQLException if a database access error occurs
     */
    public int getMaxColumnsInTable() throws SQLException {
        return databaseMetaData.getMaxColumnsInTable();
    }

    /**
     * Retrieves the maximum number of concurrent connections to this
     * database that are possible.
     *
     * @return the maximum number of active connections possible at one time;
     *         a result of zero means that there is no limit or the limit
     *         is not known
     * @throws java.sql.SQLException if a database access error occurs
     */
    public int getMaxConnections() throws SQLException {
        return databaseMetaData.getMaxConnections();
    }

    /**
     * Retrieves the maximum number of characters that this database allows in a
     * cursor name.
     *
     * @return the maximum number of characters allowed in a cursor name;
     *         a result of zero means that there is no limit or the limit
     *         is not known
     * @throws java.sql.SQLException if a database access error occurs
     */
    public int getMaxCursorNameLength() throws SQLException {
        return databaseMetaData.getMaxCursorNameLength();
    }

    /**
     * Retrieves the maximum number of bytes this database allows for an
     * index, including all of the parts of the index.
     *
     * @return the maximum number of bytes allowed; this limit includes the
     *         composite of all the constituent parts of the index;
     *         a result of zero means that there is no limit or the limit
     *         is not known
     * @throws java.sql.SQLException if a database access error occurs
     */
    public int getMaxIndexLength() throws SQLException {
        return databaseMetaData.getMaxIndexLength();
    }

    /**
     * Retrieves the maximum number of characters that this database allows in a
     * schema name.
     *
     * @return the maximum number of characters allowed in a schema name;
     *         a result of zero means that there is no limit or the limit
     *         is not known
     * @throws java.sql.SQLException if a database access error occurs
     */
    public int getMaxSchemaNameLength() throws SQLException {
        return databaseMetaData.getMaxSchemaNameLength();
    }

    /**
     * Retrieves the maximum number of characters that this database allows in a
     * procedure name.
     *
     * @return the maximum number of characters allowed in a procedure name;
     *         a result of zero means that there is no limit or the limit
     *         is not known
     * @throws java.sql.SQLException if a database access error occurs
     */
    public int getMaxProcedureNameLength() throws SQLException {
        return databaseMetaData.getMaxProcedureNameLength();
    }

    /**
     * Retrieves the maximum number of characters that this database allows in a
     * catalog name.
     *
     * @return the maximum number of characters allowed in a catalog name;
     *         a result of zero means that there is no limit or the limit
     *         is not known
     * @throws java.sql.SQLException if a database access error occurs
     */
    public int getMaxCatalogNameLength() throws SQLException {
        return databaseMetaData.getMaxCatalogNameLength();
    }

    /**
     * Retrieves the maximum number of bytes this database allows in
     * a single row.
     *
     * @return the maximum number of bytes allowed for a row; a result of
     *         zero means that there is no limit or the limit is not known
     * @throws java.sql.SQLException if a database access error occurs
     */
    public int getMaxRowSize() throws SQLException {
        return databaseMetaData.getMaxRowSize();
    }

    /**
     * Retrieves whether the return value for the method
     * <code>getMaxRowSize</code> includes the SQL data types
     * <code>LONGVARCHAR</code> and <code>LONGVARBINARY</code>.
     *
     * @return <code>true</code> if so; <code>false</code> otherwise
     * @throws java.sql.SQLException if a database access error occurs
     */
    public boolean doesMaxRowSizeIncludeBlobs() throws SQLException {
        return databaseMetaData.doesMaxRowSizeIncludeBlobs();
    }

    /**
     * Retrieves the maximum number of characters this database allows in
     * an SQL statement.
     *
     * @return the maximum number of characters allowed for an SQL statement;
     *         a result of zero means that there is no limit or the limit
     *         is not known
     * @throws java.sql.SQLException if a database access error occurs
     */
    public int getMaxStatementLength() throws SQLException {
        return databaseMetaData.getMaxStatementLength();
    }

    /**
     * Retrieves the maximum number of active statements to this database
     * that can be open at the same time.
     *
     * @return the maximum number of statements that can be open at one time;
     *         a result of zero means that there is no limit or the limit
     *         is not known
     * @throws java.sql.SQLException if a database access error occurs
     */
    public int getMaxStatements() throws SQLException {
        return databaseMetaData.getMaxStatements();
    }

    /**
     * Retrieves the maximum number of characters this database allows in
     * a table name.
     *
     * @return the maximum number of characters allowed for a table name;
     *         a result of zero means that there is no limit or the limit
     *         is not known
     * @throws java.sql.SQLException if a database access error occurs
     */
    public int getMaxTableNameLength() throws SQLException {
        return databaseMetaData.getMaxTableNameLength();
    }

    /**
     * Retrieves the maximum number of tables this database allows in a
     * <code>SELECT</code> statement.
     *
     * @return the maximum number of tables allowed in a <code>SELECT</code>
     *         statement; a result of zero means that there is no limit or
     *         the limit is not known
     * @throws java.sql.SQLException if a database access error occurs
     */
    public int getMaxTablesInSelect() throws SQLException {
        return databaseMetaData.getMaxTablesInSelect();
    }

    /**
     * Retrieves the maximum number of characters this database allows in
     * a user name.
     *
     * @return the maximum number of characters allowed for a user name;
     *         a result of zero means that there is no limit or the limit
     *         is not known
     * @throws java.sql.SQLException if a database access error occurs
     */
    public int getMaxUserNameLength() throws SQLException {
        return databaseMetaData.getMaxUserNameLength();
    }

    /**
     * Retrieves this database's default transaction isolation level.  The
     * possible values are defined in <code>java.sql.Connection</code>.
     *
     * @return the default isolation level
     * @throws java.sql.SQLException if a database access error occurs
     * @see java.sql.Connection
     */
    public int getDefaultTransactionIsolation() throws SQLException {
        return databaseMetaData.getDefaultTransactionIsolation();
    }

    /**
     * Retrieves whether this database supports transactions. If not, invoking the
     * method <code>commit</code> is a noop, and the isolation level is
     * <code>TRANSACTION_NONE</code>.
     *
     * @return <code>true</code> if transactions are supported;
     *         <code>false</code> otherwise
     * @throws java.sql.SQLException if a database access error occurs
     */
    public boolean supportsTransactions() throws SQLException {
        return databaseMetaData.supportsTransactions();
    }

    /**
     * Retrieves whether this database supports the given transaction isolation level.
     *
     * @param level one of the transaction isolation levels defined in
     *              <code>java.sql.Connection</code>
     * @return <code>true</code> if so; <code>false</code> otherwise
     * @throws java.sql.SQLException if a database access error occurs
     * @see java.sql.Connection
     */
    public boolean supportsTransactionIsolationLevel(int level) throws SQLException {
        return databaseMetaData.supportsTransactionIsolationLevel(level);
    }

    /**
     * Retrieves whether this database supports both data definition and
     * data manipulation statements within a transaction.
     *
     * @return <code>true</code> if so; <code>false</code> otherwise
     * @throws java.sql.SQLException if a database access error occurs
     */
    public boolean supportsDataDefinitionAndDataManipulationTransactions() throws SQLException {
        return databaseMetaData.supportsDataDefinitionAndDataManipulationTransactions();
    }

    /**
     * Retrieves whether this database supports only data manipulation
     * statements within a transaction.
     *
     * @return <code>true</code> if so; <code>false</code> otherwise
     * @throws java.sql.SQLException if a database access error occurs
     */
    public boolean supportsDataManipulationTransactionsOnly() throws SQLException {
        return databaseMetaData.supportsDataManipulationTransactionsOnly();
    }

    /**
     * Retrieves whether a data definition statement within a transaction forces
     * the transaction to commit.
     *
     * @return <code>true</code> if so; <code>false</code> otherwise
     * @throws java.sql.SQLException if a database access error occurs
     */
    public boolean dataDefinitionCausesTransactionCommit() throws SQLException {
        return databaseMetaData.dataDefinitionCausesTransactionCommit();
    }

    /**
     * Retrieves whether this database ignores a data definition statement
     * within a transaction.
     *
     * @return <code>true</code> if so; <code>false</code> otherwise
     * @throws java.sql.SQLException if a database access error occurs
     */
    public boolean dataDefinitionIgnoredInTransactions() throws SQLException {
        return databaseMetaData.dataDefinitionIgnoredInTransactions();
    }

    /**
     * Retrieves a description of the stored procedures available in the given
     * catalog.
     * <p/>
     * Only procedure descriptions matching the schema and
     * procedure name criteria are returned.  They are ordered by
     * <code>PROCEDURE_SCHEM</code> and <code>PROCEDURE_NAME</code>.
     * <p/>
     * <P>Each procedure description has the the following columns:
     * <OL>
     * <LI><B>PROCEDURE_CAT</B> String => procedure catalog (may be <code>null</code>)
     * <LI><B>PROCEDURE_SCHEM</B> String => procedure schema (may be <code>null</code>)
     * <LI><B>PROCEDURE_NAME</B> String => procedure name
     * <LI> reserved for future use
     * <LI> reserved for future use
     * <LI> reserved for future use
     * <LI><B>REMARKS</B> String => explanatory comment on the procedure
     * <LI><B>PROCEDURE_TYPE</B> short => kind of procedure:
     * <UL>
     * <LI> procedureResultUnknown - May return a result
     * <LI> procedureNoResult - Does not return a result
     * <LI> procedureReturnsResult - Returns a result
     * </UL>
     * </OL>
     *
     * @param catalog              a catalog name; must match the catalog name as it
     *                             is stored in the database; "" retrieves those without a catalog;
     *                             <code>null</code> means that the catalog name should not be used to narrow
     *                             the search
     * @param schemaPattern        a schema name pattern; must match the schema name
     *                             as it is stored in the database; "" retrieves those without a schema;
     *                             <code>null</code> means that the schema name should not be used to narrow
     *                             the search
     * @param procedureNamePattern a procedure name pattern; must match the
     *                             procedure name as it is stored in the database
     * @return <code>ResultSet</code> - each row is a procedure description
     * @throws java.sql.SQLException if a database access error occurs
     * @see #getSearchStringEscape
     */
    public ResultSet getProcedures(String catalog, String schemaPattern,
                                   String procedureNamePattern) throws SQLException {
        return databaseMetaData.getProcedures(catalog, schemaPattern, procedureNamePattern);
    }

    /**
     * Retrieves a description of the given catalog's stored procedure parameter
     * and result columns.
     * <p/>
     * <P>Only descriptions matching the schema, procedure and
     * parameter name criteria are returned.  They are ordered by
     * PROCEDURE_SCHEM and PROCEDURE_NAME. Within this, the return value,
     * if any, is first. Next are the parameter descriptions in call
     * order. The column descriptions follow in column number order.
     * <p/>
     * <P>Each row in the <code>ResultSet</code> is a parameter description or
     * column description with the following fields:
     * <OL>
     * <LI><B>PROCEDURE_CAT</B> String => procedure catalog (may be <code>null</code>)
     * <LI><B>PROCEDURE_SCHEM</B> String => procedure schema (may be <code>null</code>)
     * <LI><B>PROCEDURE_NAME</B> String => procedure name
     * <LI><B>COLUMN_NAME</B> String => column/parameter name
     * <LI><B>COLUMN_TYPE</B> Short => kind of column/parameter:
     * <UL>
     * <LI> procedureColumnUnknown - nobody knows
     * <LI> procedureColumnIn - IN parameter
     * <LI> procedureColumnInOut - INOUT parameter
     * <LI> procedureColumnOut - OUT parameter
     * <LI> procedureColumnReturn - procedure return value
     * <LI> procedureColumnResult - result column in <code>ResultSet</code>
     * </UL>
     * <LI><B>DATA_TYPE</B> int => SQL type from java.sql.Types
     * <LI><B>TYPE_NAME</B> String => SQL type name, for a UDT type the
     * type name is fully qualified
     * <LI><B>PRECISION</B> int => precision
     * <LI><B>LENGTH</B> int => length in bytes of data
     * <LI><B>SCALE</B> short => scale
     * <LI><B>RADIX</B> short => radix
     * <LI><B>NULLABLE</B> short => can it contain NULL.
     * <UL>
     * <LI> procedureNoNulls - does not allow NULL values
     * <LI> procedureNullable - allows NULL values
     * <LI> procedureNullableUnknown - nullability unknown
     * </UL>
     * <LI><B>REMARKS</B> String => comment describing parameter/column
     * </OL>
     * <p/>
     * <P><B>Note:</B> Some databases may not return the column
     * descriptions for a procedure. Additional columns beyond
     * REMARKS can be defined by the database.
     *
     * @param catalog              a catalog name; must match the catalog name as it
     *                             is stored in the database; "" retrieves those without a catalog;
     *                             <code>null</code> means that the catalog name should not be used to narrow
     *                             the search
     * @param schemaPattern        a schema name pattern; must match the schema name
     *                             as it is stored in the database; "" retrieves those without a schema;
     *                             <code>null</code> means that the schema name should not be used to narrow
     *                             the search
     * @param procedureNamePattern a procedure name pattern; must match the
     *                             procedure name as it is stored in the database
     * @param columnNamePattern    a column name pattern; must match the column name
     *                             as it is stored in the database
     * @return <code>ResultSet</code> - each row describes a stored procedure parameter or
     *         column
     * @throws java.sql.SQLException if a database access error occurs
     * @see #getSearchStringEscape
     */
    public ResultSet getProcedureColumns(String catalog, String schemaPattern, String procedureNamePattern,
                                         String columnNamePattern) throws SQLException {
        return databaseMetaData.getProcedureColumns(catalog, schemaPattern, procedureNamePattern, columnNamePattern);
    }

    /**
     * Retrieves a description of the tables available in the given catalog.
     * Only table descriptions matching the catalog, schema, table
     * name and type criteria are returned.  They are ordered by
     * TABLE_TYPE, TABLE_SCHEM and TABLE_NAME.
     * <p/>
     * Each table description has the following columns:
     * <OL>
     * <LI><B>TABLE_CAT</B> String => table catalog (may be <code>null</code>)
     * <LI><B>TABLE_SCHEM</B> String => table schema (may be <code>null</code>)
     * <LI><B>TABLE_NAME</B> String => table name
     * <LI><B>TABLE_TYPE</B> String => table type.  Typical types are "TABLE",
     * "VIEW",	"SYSTEM TABLE", "GLOBAL TEMPORARY",
     * "LOCAL TEMPORARY", "ALIAS", "SYNONYM".
     * <LI><B>REMARKS</B> String => explanatory comment on the table
     * <LI><B>TYPE_CAT</B> String => the types catalog (may be <code>null</code>)
     * <LI><B>TYPE_SCHEM</B> String => the types schema (may be <code>null</code>)
     * <LI><B>TYPE_NAME</B> String => type name (may be <code>null</code>)
     * <LI><B>SELF_REFERENCING_COL_NAME</B> String => name of the designated
     * "identifier" column of a typed table (may be <code>null</code>)
     * <LI><B>REF_GENERATION</B> String => specifies how values in
     * SELF_REFERENCING_COL_NAME are created. Values are
     * "SYSTEM", "USER", "DERIVED". (may be <code>null</code>)
     * </OL>
     * <p/>
     * <P><B>Note:</B> Some databases may not return information for
     * all tables.
     *
     * @param catalog          a catalog name; must match the catalog name as it
     *                         is stored in the database; "" retrieves those without a catalog;
     *                         <code>null</code> means that the catalog name should not be used to narrow
     *                         the search
     * @param schemaPattern    a schema name pattern; must match the schema name
     *                         as it is stored in the database; "" retrieves those without a schema;
     *                         <code>null</code> means that the schema name should not be used to narrow
     *                         the search
     * @param tableNamePattern a table name pattern; must match the
     *                         table name as it is stored in the database
     * @param types            a list of table types to include; <code>null</code> returns all types
     * @return <code>ResultSet</code> - each row is a table description
     * @throws java.sql.SQLException if a database access error occurs
     * @see #getSearchStringEscape
     */
    public ResultSet getTables(String catalog, String schemaPattern, String tableNamePattern,
                               String types[]) throws SQLException {
        return databaseMetaData.getTables(catalog, schemaPattern, tableNamePattern, types);
    }

    /**
     * Retrieves the schema names available in this database.  The results
     * are ordered by schema name.
     * <p/>
     * <P>The schema column is:
     * <OL>
     * <LI><B>TABLE_SCHEM</B> String => schema name
     * <LI><B>TABLE_CATALOG</B> String => catalog name (may be <code>null</code>)
     * </OL>
     *
     * @return a <code>ResultSet</code> object in which each row is a
     *         schema decription
     * @throws java.sql.SQLException if a database access error occurs
     */
    public ResultSet getSchemas() throws SQLException {
        return databaseMetaData.getSchemas();
    }

    /**
     * Retrieves the catalog names available in this database.  The results
     * are ordered by catalog name.
     * <p/>
     * <P>The catalog column is:
     * <OL>
     * <LI><B>TABLE_CAT</B> String => catalog name
     * </OL>
     *
     * @return a <code>ResultSet</code> object in which each row has a
     *         single <code>String</code> column that is a catalog name
     * @throws java.sql.SQLException if a database access error occurs
     */
    public ResultSet getCatalogs() throws SQLException {
        return databaseMetaData.getCatalogs();
    }

    /**
     * Retrieves the table types available in this database.  The results
     * are ordered by table type.
     * <p/>
     * <P>The table type is:
     * <OL>
     * <LI><B>TABLE_TYPE</B> String => table type.  Typical types are "TABLE",
     * "VIEW",	"SYSTEM TABLE", "GLOBAL TEMPORARY",
     * "LOCAL TEMPORARY", "ALIAS", "SYNONYM".
     * </OL>
     *
     * @return a <code>ResultSet</code> object in which each row has a
     *         single <code>String</code> column that is a table type
     * @throws java.sql.SQLException if a database access error occurs
     */
    public ResultSet getTableTypes() throws SQLException {
        return databaseMetaData.getTableTypes();
    }

    /**
     * Retrieves a description of table columns available in
     * the specified catalog.
     * <p/>
     * <P>Only column descriptions matching the catalog, schema, table
     * and column name criteria are returned.  They are ordered by
     * <code>TABLE_SCHEM</code>, <code>TABLE_NAME</code>, and
     * <code>ORDINAL_POSITION</code>.
     * <p/>
     * <P>Each column description has the following columns:
     * <OL>
     * <LI><B>TABLE_CAT</B> String => table catalog (may be <code>null</code>)
     * <LI><B>TABLE_SCHEM</B> String => table schema (may be <code>null</code>)
     * <LI><B>TABLE_NAME</B> String => table name
     * <LI><B>COLUMN_NAME</B> String => column name
     * <LI><B>DATA_TYPE</B> int => SQL type from java.sql.Types
     * <LI><B>TYPE_NAME</B> String => Data source dependent type name,
     * for a UDT the type name is fully qualified
     * <LI><B>COLUMN_SIZE</B> int => column size.  For char or date
     * types this is the maximum number of characters, for numeric or
     * decimal types this is precision.
     * <LI><B>BUFFER_LENGTH</B> is not used.
     * <LI><B>DECIMAL_DIGITS</B> int => the number of fractional digits
     * <LI><B>NUM_PREC_RADIX</B> int => Radix (typically either 10 or 2)
     * <LI><B>NULLABLE</B> int => is NULL allowed.
     * <UL>
     * <LI> columnNoNulls - might not allow <code>NULL</code> values
     * <LI> columnNullable - definitely allows <code>NULL</code> values
     * <LI> columnNullableUnknown - nullability unknown
     * </UL>
     * <LI><B>REMARKS</B> String => comment describing column (may be <code>null</code>)
     * <LI><B>COLUMN_DEF</B> String => default value (may be <code>null</code>)
     * <LI><B>SQL_DATA_TYPE</B> int => unused
     * <LI><B>SQL_DATETIME_SUB</B> int => unused
     * <LI><B>CHAR_OCTET_LENGTH</B> int => for char types the
     * maximum number of bytes in the column
     * <LI><B>ORDINAL_POSITION</B> int	=> index of column in table
     * (starting at 1)
     * <LI><B>IS_NULLABLE</B> String => "NO" means column definitely
     * does not allow NULL values; "YES" means the column might
     * allow NULL values.  An empty string means nobody knows.
     * <LI><B>SCOPE_CATLOG</B> String => catalog of table that is the scope
     * of a reference attribute (<code>null</code> if DATA_TYPE isn't REF)
     * <LI><B>SCOPE_SCHEMA</B> String => schema of table that is the scope
     * of a reference attribute (<code>null</code> if the DATA_TYPE isn't REF)
     * <LI><B>SCOPE_TABLE</B> String => table name that this the scope
     * of a reference attribure (<code>null</code> if the DATA_TYPE isn't REF)
     * <LI><B>SOURCE_DATA_TYPE</B> short => source type of a distinct type or user-generated
     * Ref type, SQL type from java.sql.Types (<code>null</code> if DATA_TYPE
     * isn't DISTINCT or user-generated REF)
     * </OL>
     *
     * @param catalog           a catalog name; must match the catalog name as it
     *                          is stored in the database; "" retrieves those without a catalog;
     *                          <code>null</code> means that the catalog name should not be used to narrow
     *                          the search
     * @param schemaPattern     a schema name pattern; must match the schema name
     *                          as it is stored in the database; "" retrieves those without a schema;
     *                          <code>null</code> means that the schema name should not be used to narrow
     *                          the search
     * @param tableNamePattern  a table name pattern; must match the
     *                          table name as it is stored in the database
     * @param columnNamePattern a column name pattern; must match the column
     *                          name as it is stored in the database
     * @return <code>ResultSet</code> - each row is a column description
     * @throws java.sql.SQLException if a database access error occurs
     * @see #getSearchStringEscape
     */
    public ResultSet getColumns(String catalog, String schemaPattern, String tableNamePattern,
                                String columnNamePattern) throws SQLException {
        return databaseMetaData.getColumns(catalog, schemaPattern, tableNamePattern, columnNamePattern);
    }

    /**
     * Retrieves a description of the access rights for a table's columns.
     * <p/>
     * <P>Only privileges matching the column name criteria are
     * returned.  They are ordered by COLUMN_NAME and PRIVILEGE.
     * <p/>
     * <P>Each privilige description has the following columns:
     * <OL>
     * <LI><B>TABLE_CAT</B> String => table catalog (may be <code>null</code>)
     * <LI><B>TABLE_SCHEM</B> String => table schema (may be <code>null</code>)
     * <LI><B>TABLE_NAME</B> String => table name
     * <LI><B>COLUMN_NAME</B> String => column name
     * <LI><B>GRANTOR</B> => grantor of access (may be <code>null</code>)
     * <LI><B>GRANTEE</B> String => grantee of access
     * <LI><B>PRIVILEGE</B> String => name of access (SELECT,
     * INSERT, UPDATE, REFRENCES, ...)
     * <LI><B>IS_GRANTABLE</B> String => "YES" if grantee is permitted
     * to grant to others; "NO" if not; <code>null</code> if unknown
     * </OL>
     *
     * @param catalog           a catalog name; must match the catalog name as it
     *                          is stored in the database; "" retrieves those without a catalog;
     *                          <code>null</code> means that the catalog name should not be used to narrow
     *                          the search
     * @param schema            a schema name; must match the schema name as it is
     *                          stored in the database; "" retrieves those without a schema;
     *                          <code>null</code> means that the schema name should not be used to narrow
     *                          the search
     * @param table             a table name; must match the table name as it is
     *                          stored in the database
     * @param columnNamePattern a column name pattern; must match the column
     *                          name as it is stored in the database
     * @return <code>ResultSet</code> - each row is a column privilege description
     * @throws java.sql.SQLException if a database access error occurs
     * @see #getSearchStringEscape
     */
    public ResultSet getColumnPrivileges(String catalog, String schema, String table,
                                         String columnNamePattern) throws SQLException {
        return databaseMetaData.getColumnPrivileges(catalog, schema, table, columnNamePattern);
    }

    /**
     * Retrieves a description of the access rights for each table available
     * in a catalog. Note that a table privilege applies to one or
     * more columns in the table. It would be wrong to assume that
     * this privilege applies to all columns (this may be true for
     * some systems but is not true for all.)
     * <p/>
     * <P>Only privileges matching the schema and table name
     * criteria are returned.  They are ordered by TABLE_SCHEM,
     * TABLE_NAME, and PRIVILEGE.
     * <p/>
     * <P>Each privilige description has the following columns:
     * <OL>
     * <LI><B>TABLE_CAT</B> String => table catalog (may be <code>null</code>)
     * <LI><B>TABLE_SCHEM</B> String => table schema (may be <code>null</code>)
     * <LI><B>TABLE_NAME</B> String => table name
     * <LI><B>GRANTOR</B> => grantor of access (may be <code>null</code>)
     * <LI><B>GRANTEE</B> String => grantee of access
     * <LI><B>PRIVILEGE</B> String => name of access (SELECT,
     * INSERT, UPDATE, REFRENCES, ...)
     * <LI><B>IS_GRANTABLE</B> String => "YES" if grantee is permitted
     * to grant to others; "NO" if not; <code>null</code> if unknown
     * </OL>
     *
     * @param catalog          a catalog name; must match the catalog name as it
     *                         is stored in the database; "" retrieves those without a catalog;
     *                         <code>null</code> means that the catalog name should not be used to narrow
     *                         the search
     * @param schemaPattern    a schema name pattern; must match the schema name
     *                         as it is stored in the database; "" retrieves those without a schema;
     *                         <code>null</code> means that the schema name should not be used to narrow
     *                         the search
     * @param tableNamePattern a table name pattern; must match the
     *                         table name as it is stored in the database
     * @return <code>ResultSet</code> - each row is a table privilege description
     * @throws java.sql.SQLException if a database access error occurs
     * @see #getSearchStringEscape
     */
    public ResultSet getTablePrivileges(String catalog, String schemaPattern,
                                        String tableNamePattern) throws SQLException {
        return databaseMetaData.getTablePrivileges(catalog, schemaPattern, tableNamePattern);
    }

    /**
     * Retrieves a description of a table's optimal set of columns that
     * uniquely identifies a row. They are ordered by SCOPE.
     * <p/>
     * <P>Each column description has the following columns:
     * <OL>
     * <LI><B>SCOPE</B> short => actual scope of result
     * <UL>
     * <LI> bestRowTemporary - very temporary, while using row
     * <LI> bestRowTransaction - valid for remainder of current transaction
     * <LI> bestRowSession - valid for remainder of current session
     * </UL>
     * <LI><B>COLUMN_NAME</B> String => column name
     * <LI><B>DATA_TYPE</B> int => SQL data type from java.sql.Types
     * <LI><B>TYPE_NAME</B> String => Data source dependent type name,
     * for a UDT the type name is fully qualified
     * <LI><B>COLUMN_SIZE</B> int => precision
     * <LI><B>BUFFER_LENGTH</B> int => not used
     * <LI><B>DECIMAL_DIGITS</B> short	 => scale
     * <LI><B>PSEUDO_COLUMN</B> short => is this a pseudo column
     * like an Oracle ROWID
     * <UL>
     * <LI> bestRowUnknown - may or may not be pseudo column
     * <LI> bestRowNotPseudo - is NOT a pseudo column
     * <LI> bestRowPseudo - is a pseudo column
     * </UL>
     * </OL>
     *
     * @param catalog  a catalog name; must match the catalog name as it
     *                 is stored in the database; "" retrieves those without a catalog;
     *                 <code>null</code> means that the catalog name should not be used to narrow
     *                 the search
     * @param schema   a schema name; must match the schema name
     *                 as it is stored in the database; "" retrieves those without a schema;
     *                 <code>null</code> means that the schema name should not be used to narrow
     *                 the search
     * @param table    a table name; must match the table name as it is stored
     *                 in the database
     * @param scope    the scope of interest; use same values as SCOPE
     * @param nullable include columns that are nullable.
     * @return <code>ResultSet</code> - each row is a column description
     * @throws java.sql.SQLException if a database access error occurs
     */
    public ResultSet getBestRowIdentifier(String catalog, String schema, String table, int scope,
                                          boolean nullable) throws SQLException {
        return databaseMetaData.getBestRowIdentifier(catalog, schema, table, scope, nullable);
    }

    /**
     * Retrieves a description of a table's columns that are automatically
     * updated when any value in a row is updated.  They are
     * unordered.
     * <p/>
     * <P>Each column description has the following columns:
     * <OL>
     * <LI><B>SCOPE</B> short => is not used
     * <LI><B>COLUMN_NAME</B> String => column name
     * <LI><B>DATA_TYPE</B> int => SQL data type from <code>java.sql.Types</code>
     * <LI><B>TYPE_NAME</B> String => Data source-dependent type name
     * <LI><B>COLUMN_SIZE</B> int => precision
     * <LI><B>BUFFER_LENGTH</B> int => length of column value in bytes
     * <LI><B>DECIMAL_DIGITS</B> short	 => scale
     * <LI><B>PSEUDO_COLUMN</B> short => whether this is pseudo column
     * like an Oracle ROWID
     * <UL>
     * <LI> versionColumnUnknown - may or may not be pseudo column
     * <LI> versionColumnNotPseudo - is NOT a pseudo column
     * <LI> versionColumnPseudo - is a pseudo column
     * </UL>
     * </OL>
     *
     * @param catalog a catalog name; must match the catalog name as it
     *                is stored in the database; "" retrieves those without a catalog;
     *                <code>null</code> means that the catalog name should not be used to narrow
     *                the search
     * @param schema  a schema name; must match the schema name
     *                as it is stored in the database; "" retrieves those without a schema;
     *                <code>null</code> means that the schema name should not be used to narrow
     *                the search
     * @param table   a table name; must match the table name as it is stored
     *                in the database
     * @return a <code>ResultSet</code> object in which each row is a
     *         column description
     * @throws java.sql.SQLException if a database access error occurs
     */
    public ResultSet getVersionColumns(String catalog, String schema, String table) throws SQLException {
        return databaseMetaData.getVersionColumns(catalog, schema, table);
    }

    /**
     * Retrieves a description of the given table's primary key columns.  They
     * are ordered by COLUMN_NAME.
     * <p/>
     * <P>Each primary key column description has the following columns:
     * <OL>
     * <LI><B>TABLE_CAT</B> String => table catalog (may be <code>null</code>)
     * <LI><B>TABLE_SCHEM</B> String => table schema (may be <code>null</code>)
     * <LI><B>TABLE_NAME</B> String => table name
     * <LI><B>COLUMN_NAME</B> String => column name
     * <LI><B>KEY_SEQ</B> short => sequence number within primary key
     * <LI><B>PK_NAME</B> String => primary key name (may be <code>null</code>)
     * </OL>
     *
     * @param catalog a catalog name; must match the catalog name as it
     *                is stored in the database; "" retrieves those without a catalog;
     *                <code>null</code> means that the catalog name should not be used to narrow
     *                the search
     * @param schema  a schema name; must match the schema name
     *                as it is stored in the database; "" retrieves those without a schema;
     *                <code>null</code> means that the schema name should not be used to narrow
     *                the search
     * @param table   a table name; must match the table name as it is stored
     *                in the database
     * @return <code>ResultSet</code> - each row is a primary key column description
     * @throws java.sql.SQLException if a database access error occurs
     */
    public ResultSet getPrimaryKeys(String catalog, String schema, String table) throws SQLException {
        return databaseMetaData.getPrimaryKeys(catalog, schema, table);
    }

    /**
     * Retrieves a description of the primary key columns that are
     * referenced by a table's foreign key columns (the primary keys
     * imported by a table).  They are ordered by PKTABLE_CAT,
     * PKTABLE_SCHEM, PKTABLE_NAME, and KEY_SEQ.
     * <p/>
     * <P>Each primary key column description has the following columns:
     * <OL>
     * <LI><B>PKTABLE_CAT</B> String => primary key table catalog
     * being imported (may be <code>null</code>)
     * <LI><B>PKTABLE_SCHEM</B> String => primary key table schema
     * being imported (may be <code>null</code>)
     * <LI><B>PKTABLE_NAME</B> String => primary key table name
     * being imported
     * <LI><B>PKCOLUMN_NAME</B> String => primary key column name
     * being imported
     * <LI><B>FKTABLE_CAT</B> String => foreign key table catalog (may be <code>null</code>)
     * <LI><B>FKTABLE_SCHEM</B> String => foreign key table schema (may be <code>null</code>)
     * <LI><B>FKTABLE_NAME</B> String => foreign key table name
     * <LI><B>FKCOLUMN_NAME</B> String => foreign key column name
     * <LI><B>KEY_SEQ</B> short => sequence number within a foreign key
     * <LI><B>UPDATE_RULE</B> short => What happens to a
     * foreign key when the primary key is updated:
     * <UL>
     * <LI> importedNoAction - do not allow update of primary
     * key if it has been imported
     * <LI> importedKeyCascade - change imported key to agree
     * with primary key update
     * <LI> importedKeySetNull - change imported key to <code>NULL</code>
     * if its primary key has been updated
     * <LI> importedKeySetDefault - change imported key to default values
     * if its primary key has been updated
     * <LI> importedKeyRestrict - same as importedKeyNoAction
     * (for ODBC 2.x compatibility)
     * </UL>
     * <LI><B>DELETE_RULE</B> short => What happens to
     * the foreign key when primary is deleted.
     * <UL>
     * <LI> importedKeyNoAction - do not allow delete of primary
     * key if it has been imported
     * <LI> importedKeyCascade - delete rows that import a deleted key
     * <LI> importedKeySetNull - change imported key to NULL if
     * its primary key has been deleted
     * <LI> importedKeyRestrict - same as importedKeyNoAction
     * (for ODBC 2.x compatibility)
     * <LI> importedKeySetDefault - change imported key to default if
     * its primary key has been deleted
     * </UL>
     * <LI><B>FK_NAME</B> String => foreign key name (may be <code>null</code>)
     * <LI><B>PK_NAME</B> String => primary key name (may be <code>null</code>)
     * <LI><B>DEFERRABILITY</B> short => can the evaluation of foreign key
     * constraints be deferred until commit
     * <UL>
     * <LI> importedKeyInitiallyDeferred - see SQL92 for definition
     * <LI> importedKeyInitiallyImmediate - see SQL92 for definition
     * <LI> importedKeyNotDeferrable - see SQL92 for definition
     * </UL>
     * </OL>
     *
     * @param catalog a catalog name; must match the catalog name as it
     *                is stored in the database; "" retrieves those without a catalog;
     *                <code>null</code> means that the catalog name should not be used to narrow
     *                the search
     * @param schema  a schema name; must match the schema name
     *                as it is stored in the database; "" retrieves those without a schema;
     *                <code>null</code> means that the schema name should not be used to narrow
     *                the search
     * @param table   a table name; must match the table name as it is stored
     *                in the database
     * @return <code>ResultSet</code> - each row is a primary key column description
     * @throws java.sql.SQLException if a database access error occurs
     * @see #getExportedKeys
     */
    public ResultSet getImportedKeys(String catalog, String schema, String table) throws SQLException {
        return databaseMetaData.getImportedKeys(catalog, schema, table);
    }

    /**
     * Retrieves a description of the foreign key columns that reference the
     * given table's primary key columns (the foreign keys exported by a
     * table).  They are ordered by FKTABLE_CAT, FKTABLE_SCHEM,
     * FKTABLE_NAME, and KEY_SEQ.
     * <p/>
     * <P>Each foreign key column description has the following columns:
     * <OL>
     * <LI><B>PKTABLE_CAT</B> String => primary key table catalog (may be <code>null</code>)
     * <LI><B>PKTABLE_SCHEM</B> String => primary key table schema (may be <code>null</code>)
     * <LI><B>PKTABLE_NAME</B> String => primary key table name
     * <LI><B>PKCOLUMN_NAME</B> String => primary key column name
     * <LI><B>FKTABLE_CAT</B> String => foreign key table catalog (may be <code>null</code>)
     * being exported (may be <code>null</code>)
     * <LI><B>FKTABLE_SCHEM</B> String => foreign key table schema (may be <code>null</code>)
     * being exported (may be <code>null</code>)
     * <LI><B>FKTABLE_NAME</B> String => foreign key table name
     * being exported
     * <LI><B>FKCOLUMN_NAME</B> String => foreign key column name
     * being exported
     * <LI><B>KEY_SEQ</B> short => sequence number within foreign key
     * <LI><B>UPDATE_RULE</B> short => What happens to
     * foreign key when primary is updated:
     * <UL>
     * <LI> importedNoAction - do not allow update of primary
     * key if it has been imported
     * <LI> importedKeyCascade - change imported key to agree
     * with primary key update
     * <LI> importedKeySetNull - change imported key to <code>NULL</code> if
     * its primary key has been updated
     * <LI> importedKeySetDefault - change imported key to default values
     * if its primary key has been updated
     * <LI> importedKeyRestrict - same as importedKeyNoAction
     * (for ODBC 2.x compatibility)
     * </UL>
     * <LI><B>DELETE_RULE</B> short => What happens to
     * the foreign key when primary is deleted.
     * <UL>
     * <LI> importedKeyNoAction - do not allow delete of primary
     * key if it has been imported
     * <LI> importedKeyCascade - delete rows that import a deleted key
     * <LI> importedKeySetNull - change imported key to <code>NULL</code> if
     * its primary key has been deleted
     * <LI> importedKeyRestrict - same as importedKeyNoAction
     * (for ODBC 2.x compatibility)
     * <LI> importedKeySetDefault - change imported key to default if
     * its primary key has been deleted
     * </UL>
     * <LI><B>FK_NAME</B> String => foreign key name (may be <code>null</code>)
     * <LI><B>PK_NAME</B> String => primary key name (may be <code>null</code>)
     * <LI><B>DEFERRABILITY</B> short => can the evaluation of foreign key
     * constraints be deferred until commit
     * <UL>
     * <LI> importedKeyInitiallyDeferred - see SQL92 for definition
     * <LI> importedKeyInitiallyImmediate - see SQL92 for definition
     * <LI> importedKeyNotDeferrable - see SQL92 for definition
     * </UL>
     * </OL>
     *
     * @param catalog a catalog name; must match the catalog name as it
     *                is stored in this database; "" retrieves those without a catalog;
     *                <code>null</code> means that the catalog name should not be used to narrow
     *                the search
     * @param schema  a schema name; must match the schema name
     *                as it is stored in the database; "" retrieves those without a schema;
     *                <code>null</code> means that the schema name should not be used to narrow
     *                the search
     * @param table   a table name; must match the table name as it is stored
     *                in this database
     * @return a <code>ResultSet</code> object in which each row is a
     *         foreign key column description
     * @throws java.sql.SQLException if a database access error occurs
     * @see #getImportedKeys
     */
    public ResultSet getExportedKeys(String catalog, String schema, String table) throws SQLException {
        return databaseMetaData.getExportedKeys(catalog, schema, table);
    }

    /**
     * Retrieves a description of the foreign key columns in the given foreign key
     * table that reference the primary key columns of the given primary key
     * table (describe how one table imports another's key). This
     * should normally return a single foreign key/primary key pair because
     * most tables import a foreign key from a table only once.  They
     * are ordered by FKTABLE_CAT, FKTABLE_SCHEM, FKTABLE_NAME, and
     * KEY_SEQ.
     * <p/>
     * <P>Each foreign key column description has the following columns:
     * <OL>
     * <LI><B>PKTABLE_CAT</B> String => primary key table catalog (may be <code>null</code>)
     * <LI><B>PKTABLE_SCHEM</B> String => primary key table schema (may be <code>null</code>)
     * <LI><B>PKTABLE_NAME</B> String => primary key table name
     * <LI><B>PKCOLUMN_NAME</B> String => primary key column name
     * <LI><B>FKTABLE_CAT</B> String => foreign key table catalog (may be <code>null</code>)
     * being exported (may be <code>null</code>)
     * <LI><B>FKTABLE_SCHEM</B> String => foreign key table schema (may be <code>null</code>)
     * being exported (may be <code>null</code>)
     * <LI><B>FKTABLE_NAME</B> String => foreign key table name
     * being exported
     * <LI><B>FKCOLUMN_NAME</B> String => foreign key column name
     * being exported
     * <LI><B>KEY_SEQ</B> short => sequence number within foreign key
     * <LI><B>UPDATE_RULE</B> short => What happens to
     * foreign key when primary is updated:
     * <UL>
     * <LI> importedNoAction - do not allow update of primary
     * key if it has been imported
     * <LI> importedKeyCascade - change imported key to agree
     * with primary key update
     * <LI> importedKeySetNull - change imported key to <code>NULL</code> if
     * its primary key has been updated
     * <LI> importedKeySetDefault - change imported key to default values
     * if its primary key has been updated
     * <LI> importedKeyRestrict - same as importedKeyNoAction
     * (for ODBC 2.x compatibility)
     * </UL>
     * <LI><B>DELETE_RULE</B> short => What happens to
     * the foreign key when primary is deleted.
     * <UL>
     * <LI> importedKeyNoAction - do not allow delete of primary
     * key if it has been imported
     * <LI> importedKeyCascade - delete rows that import a deleted key
     * <LI> importedKeySetNull - change imported key to <code>NULL</code> if
     * its primary key has been deleted
     * <LI> importedKeyRestrict - same as importedKeyNoAction
     * (for ODBC 2.x compatibility)
     * <LI> importedKeySetDefault - change imported key to default if
     * its primary key has been deleted
     * </UL>
     * <LI><B>FK_NAME</B> String => foreign key name (may be <code>null</code>)
     * <LI><B>PK_NAME</B> String => primary key name (may be <code>null</code>)
     * <LI><B>DEFERRABILITY</B> short => can the evaluation of foreign key
     * constraints be deferred until commit
     * <UL>
     * <LI> importedKeyInitiallyDeferred - see SQL92 for definition
     * <LI> importedKeyInitiallyImmediate - see SQL92 for definition
     * <LI> importedKeyNotDeferrable - see SQL92 for definition
     * </UL>
     * </OL>
     *
     * @param primaryCatalog a catalog name; must match the catalog name
     *                       as it is stored in the database; "" retrieves those without a
     *                       catalog; <code>null</code> means drop catalog name from the selection criteria
     * @param primarySchema  a schema name; must match the schema name as
     *                       it is stored in the database; "" retrieves those without a schema;
     *                       <code>null</code> means drop schema name from the selection criteria
     * @param primaryTable   the name of the table that exports the key; must match
     *                       the table name as it is stored in the database
     * @param foreignCatalog a catalog name; must match the catalog name as
     *                       it is stored in the database; "" retrieves those without a
     *                       catalog; <code>null</code> means drop catalog name from the selection criteria
     * @param foreignSchema  a schema name; must match the schema name as it
     *                       is stored in the database; "" retrieves those without a schema;
     *                       <code>null</code> means drop schema name from the selection criteria
     * @param foreignTable   the name of the table that imports the key; must match
     *                       the table name as it is stored in the database
     * @return <code>ResultSet</code> - each row is a foreign key column description
     * @throws java.sql.SQLException if a database access error occurs
     * @see #getImportedKeys
     */
    public ResultSet getCrossReference(String primaryCatalog, String primarySchema, String primaryTable,
                                       String foreignCatalog, String foreignSchema, String foreignTable)
            throws SQLException {
        return databaseMetaData.getCrossReference(primaryCatalog, primarySchema, primaryTable,
                foreignCatalog, foreignSchema, foreignTable);
    }

    /**
     * Retrieves a description of all the standard SQL types supported by
     * this database. They are ordered by DATA_TYPE and then by how
     * closely the data type maps to the corresponding JDBC SQL type.
     * <p/>
     * <P>Each type description has the following columns:
     * <OL>
     * <LI><B>TYPE_NAME</B> String => Type name
     * <LI><B>DATA_TYPE</B> int => SQL data type from java.sql.Types
     * <LI><B>PRECISION</B> int => maximum precision
     * <LI><B>LITERAL_PREFIX</B> String => prefix used to quote a literal
     * (may be <code>null</code>)
     * <LI><B>LITERAL_SUFFIX</B> String => suffix used to quote a literal
     * (may be <code>null</code>)
     * <LI><B>CREATE_PARAMS</B> String => parameters used in creating
     * the type (may be <code>null</code>)
     * <LI><B>NULLABLE</B> short => can you use NULL for this type.
     * <UL>
     * <LI> typeNoNulls - does not allow NULL values
     * <LI> typeNullable - allows NULL values
     * <LI> typeNullableUnknown - nullability unknown
     * </UL>
     * <LI><B>CASE_SENSITIVE</B> boolean=> is it case sensitive.
     * <LI><B>SEARCHABLE</B> short => can you use "WHERE" based on this type:
     * <UL>
     * <LI> typePredNone - No support
     * <LI> typePredChar - Only supported with WHERE .. LIKE
     * <LI> typePredBasic - Supported except for WHERE .. LIKE
     * <LI> typeSearchable - Supported for all WHERE ..
     * </UL>
     * <LI><B>UNSIGNED_ATTRIBUTE</B> boolean => is it unsigned.
     * <LI><B>FIXED_PREC_SCALE</B> boolean => can it be a money value.
     * <LI><B>AUTO_INCREMENT</B> boolean => can it be used for an
     * auto-increment value.
     * <LI><B>LOCAL_TYPE_NAME</B> String => localized version of type name
     * (may be <code>null</code>)
     * <LI><B>MINIMUM_SCALE</B> short => minimum scale supported
     * <LI><B>MAXIMUM_SCALE</B> short => maximum scale supported
     * <LI><B>SQL_DATA_TYPE</B> int => unused
     * <LI><B>SQL_DATETIME_SUB</B> int => unused
     * <LI><B>NUM_PREC_RADIX</B> int => usually 2 or 10
     * </OL>
     *
     * @return a <code>ResultSet</code> object in which each row is an SQL
     *         type description
     * @throws java.sql.SQLException if a database access error occurs
     */
    public ResultSet getTypeInfo() throws SQLException {
        return databaseMetaData.getTypeInfo();
    }

    /**
     * Retrieves a description of the given table's indices and statistics. They are
     * ordered by NON_UNIQUE, TYPE, INDEX_NAME, and ORDINAL_POSITION.
     * <p/>
     * <P>Each index column description has the following columns:
     * <OL>
     * <LI><B>TABLE_CAT</B> String => table catalog (may be <code>null</code>)
     * <LI><B>TABLE_SCHEM</B> String => table schema (may be <code>null</code>)
     * <LI><B>TABLE_NAME</B> String => table name
     * <LI><B>NON_UNIQUE</B> boolean => Can index values be non-unique.
     * false when TYPE is tableIndexStatistic
     * <LI><B>INDEX_QUALIFIER</B> String => index catalog (may be <code>null</code>);
     * <code>null</code> when TYPE is tableIndexStatistic
     * <LI><B>INDEX_NAME</B> String => index name; <code>null</code> when TYPE is
     * tableIndexStatistic
     * <LI><B>TYPE</B> short => index type:
     * <UL>
     * <LI> tableIndexStatistic - this identifies table statistics that are
     * returned in conjuction with a table's index descriptions
     * <LI> tableIndexClustered - this is a clustered index
     * <LI> tableIndexHashed - this is a hashed index
     * <LI> tableIndexOther - this is some other style of index
     * </UL>
     * <LI><B>ORDINAL_POSITION</B> short => column sequence number
     * within index; zero when TYPE is tableIndexStatistic
     * <LI><B>COLUMN_NAME</B> String => column name; <code>null</code> when TYPE is
     * tableIndexStatistic
     * <LI><B>ASC_OR_DESC</B> String => column sort sequence, "A" => ascending,
     * "D" => descending, may be <code>null</code> if sort sequence is not supported;
     * <code>null</code> when TYPE is tableIndexStatistic
     * <LI><B>CARDINALITY</B> int => When TYPE is tableIndexStatistic, then
     * this is the number of rows in the table; otherwise, it is the
     * number of unique values in the index.
     * <LI><B>PAGES</B> int => When TYPE is  tableIndexStatisic then
     * this is the number of pages used for the table, otherwise it
     * is the number of pages used for the current index.
     * <LI><B>FILTER_CONDITION</B> String => Filter condition, if any.
     * (may be <code>null</code>)
     * </OL>
     *
     * @param catalog     a catalog name; must match the catalog name as it
     *                    is stored in this database; "" retrieves those without a catalog;
     *                    <code>null</code> means that the catalog name should not be used to narrow
     *                    the search
     * @param schema      a schema name; must match the schema name
     *                    as it is stored in this database; "" retrieves those without a schema;
     *                    <code>null</code> means that the schema name should not be used to narrow
     *                    the search
     * @param table       a table name; must match the table name as it is stored
     *                    in this database
     * @param unique      when true, return only indices for unique values;
     *                    when false, return indices regardless of whether unique or not
     * @param approximate when true, result is allowed to reflect approximate
     *                    or out of data values; when false, results are requested to be
     *                    accurate
     * @return <code>ResultSet</code> - each row is an index column description
     * @throws java.sql.SQLException if a database access error occurs
     */
    public ResultSet getIndexInfo(String catalog, String schema, String table, boolean unique,
                                  boolean approximate) throws SQLException {
        return databaseMetaData.getIndexInfo(catalog, schema, table, unique, approximate);
    }

    /**
     * Retrieves whether this database supports the given result set type.
     *
     * @param type defined in <code>java.sql.ResultSet</code>
     * @return <code>true</code> if so; <code>false</code> otherwise
     * @throws java.sql.SQLException if a database access error occurs
     * @see java.sql.Connection
     * @since 1.2
     */
    public boolean supportsResultSetType(int type) throws SQLException {
        return databaseMetaData.supportsResultSetType(type);
    }

    /**
     * Retrieves whether this database supports the given concurrency type
     * in combination with the given result set type.
     *
     * @param type        defined in <code>java.sql.ResultSet</code>
     * @param concurrency type defined in <code>java.sql.ResultSet</code>
     * @return <code>true</code> if so; <code>false</code> otherwise
     * @throws java.sql.SQLException if a database access error occurs
     * @see java.sql.Connection
     * @since 1.2
     */
    public boolean supportsResultSetConcurrency(int type, int concurrency) throws SQLException {
        return databaseMetaData.supportsResultSetConcurrency(type, concurrency);
    }

    /**
     * Retrieves whether for the given type of <code>ResultSet</code> object,
     * the result set's own updates are visible.
     *
     * @param type the <code>ResultSet</code> type; one of
     *             <code>ResultSet.TYPE_FORWARD_ONLY</code>,
     *             <code>ResultSet.TYPE_SCROLL_INSENSITIVE</code>, or
     *             <code>ResultSet.TYPE_SCROLL_SENSITIVE</code>
     * @return <code>true</code> if updates are visible for the given result set type;
     *         <code>false</code> otherwise
     * @throws java.sql.SQLException if a database access error occurs
     * @since 1.2
     */
    public boolean ownUpdatesAreVisible(int type) throws SQLException {
        return databaseMetaData.ownUpdatesAreVisible(type);
    }

    /**
     * Retrieves whether a result set's own deletes are visible.
     *
     * @param type the <code>ResultSet</code> type; one of
     *             <code>ResultSet.TYPE_FORWARD_ONLY</code>,
     *             <code>ResultSet.TYPE_SCROLL_INSENSITIVE</code>, or
     *             <code>ResultSet.TYPE_SCROLL_SENSITIVE</code>
     * @return <code>true</code> if deletes are visible for the given result set type;
     *         <code>false</code> otherwise
     * @throws java.sql.SQLException if a database access error occurs
     * @since 1.2
     */
    public boolean ownDeletesAreVisible(int type) throws SQLException {
        return databaseMetaData.ownDeletesAreVisible(type);
    }

    /**
     * Retrieves whether a result set's own inserts are visible.
     *
     * @param type the <code>ResultSet</code> type; one of
     *             <code>ResultSet.TYPE_FORWARD_ONLY</code>,
     *             <code>ResultSet.TYPE_SCROLL_INSENSITIVE</code>, or
     *             <code>ResultSet.TYPE_SCROLL_SENSITIVE</code>
     * @return <code>true</code> if inserts are visible for the given result set type;
     *         <code>false</code> otherwise
     * @throws java.sql.SQLException if a database access error occurs
     * @since 1.2
     */
    public boolean ownInsertsAreVisible(int type) throws SQLException {
        return databaseMetaData.ownInsertsAreVisible(type);
    }

    /**
     * Retrieves whether updates made by others are visible.
     *
     * @param type the <code>ResultSet</code> type; one of
     *             <code>ResultSet.TYPE_FORWARD_ONLY</code>,
     *             <code>ResultSet.TYPE_SCROLL_INSENSITIVE</code>, or
     *             <code>ResultSet.TYPE_SCROLL_SENSITIVE</code>
     * @return <code>true</code> if updates made by others
     *         are visible for the given result set type;
     *         <code>false</code> otherwise
     * @throws java.sql.SQLException if a database access error occurs
     * @since 1.2
     */
    public boolean othersUpdatesAreVisible(int type) throws SQLException {
        return databaseMetaData.othersUpdatesAreVisible(type);
    }

    /**
     * Retrieves whether deletes made by others are visible.
     *
     * @param type the <code>ResultSet</code> type; one of
     *             <code>ResultSet.TYPE_FORWARD_ONLY</code>,
     *             <code>ResultSet.TYPE_SCROLL_INSENSITIVE</code>, or
     *             <code>ResultSet.TYPE_SCROLL_SENSITIVE</code>
     * @return <code>true</code> if deletes made by others
     *         are visible for the given result set type;
     *         <code>false</code> otherwise
     * @throws java.sql.SQLException if a database access error occurs
     * @since 1.2
     */
    public boolean othersDeletesAreVisible(int type) throws SQLException {
        return databaseMetaData.othersDeletesAreVisible(type);
    }

    /**
     * Retrieves whether inserts made by others are visible.
     *
     * @param type the <code>ResultSet</code> type; one of
     *             <code>ResultSet.TYPE_FORWARD_ONLY</code>,
     *             <code>ResultSet.TYPE_SCROLL_INSENSITIVE</code>, or
     *             <code>ResultSet.TYPE_SCROLL_SENSITIVE</code>
     * @return <code>true</code> if inserts made by others
     *         are visible for the given result set type;
     *         <code>false</code> otherwise
     * @throws java.sql.SQLException if a database access error occurs
     * @since 1.2
     */
    public boolean othersInsertsAreVisible(int type) throws SQLException {
        return databaseMetaData.othersInsertsAreVisible(type);
    }

    /**
     * Retrieves whether or not a visible row update can be detected by
     * calling the method <code>ResultSet.rowUpdated</code>.
     *
     * @param type the <code>ResultSet</code> type; one of
     *             <code>ResultSet.TYPE_FORWARD_ONLY</code>,
     *             <code>ResultSet.TYPE_SCROLL_INSENSITIVE</code>, or
     *             <code>ResultSet.TYPE_SCROLL_SENSITIVE</code>
     * @return <code>true</code> if changes are detected by the result set type;
     *         <code>false</code> otherwise
     * @throws java.sql.SQLException if a database access error occurs
     * @since 1.2
     */
    public boolean updatesAreDetected(int type) throws SQLException {
        return databaseMetaData.updatesAreDetected(type);
    }

    /**
     * Retrieves whether or not a visible row delete can be detected by
     * calling the method <code>ResultSet.rowDeleted</code>.  If the method
     * <code>deletesAreDetected</code> returns <code>false</code>, it means that
     * deleted rows are removed from the result set.
     *
     * @param type the <code>ResultSet</code> type; one of
     *             <code>ResultSet.TYPE_FORWARD_ONLY</code>,
     *             <code>ResultSet.TYPE_SCROLL_INSENSITIVE</code>, or
     *             <code>ResultSet.TYPE_SCROLL_SENSITIVE</code>
     * @return <code>true</code> if deletes are detected by the given result set type;
     *         <code>false</code> otherwise
     * @throws java.sql.SQLException if a database access error occurs
     * @since 1.2
     */
    public boolean deletesAreDetected(int type) throws SQLException {
        return databaseMetaData.deletesAreDetected(type);
    }

    /**
     * Retrieves whether or not a visible row insert can be detected
     * by calling the method <code>ResultSet.rowInserted</code>.
     *
     * @param type the <code>ResultSet</code> type; one of
     *             <code>ResultSet.TYPE_FORWARD_ONLY</code>,
     *             <code>ResultSet.TYPE_SCROLL_INSENSITIVE</code>, or
     *             <code>ResultSet.TYPE_SCROLL_SENSITIVE</code>
     * @return <code>true</code> if changes are detected by the specified result
     *         set type; <code>false</code> otherwise
     * @throws java.sql.SQLException if a database access error occurs
     * @since 1.2
     */
    public boolean insertsAreDetected(int type) throws SQLException {
        return databaseMetaData.insertsAreDetected(type);
    }

    /**
     * Retrieves whether this database supports batch updates.
     *
     * @return <code>true</code> if this database supports batch upcates;
     *         <code>false</code> otherwise
     * @throws java.sql.SQLException if a database access error occurs
     * @since 1.2
     */
    public boolean supportsBatchUpdates() throws SQLException {
        return databaseMetaData.supportsBatchUpdates();
    }

    /**
     * Retrieves a description of the user-defined types (UDTs) defined
     * in a particular schema.  Schema-specific UDTs may have type
     * <code>JAVA_OBJECT</code>, <code>STRUCT</code>,
     * or <code>DISTINCT</code>.
     * <p/>
     * <P>Only types matching the catalog, schema, type name and type
     * criteria are returned.  They are ordered by DATA_TYPE, TYPE_SCHEM
     * and TYPE_NAME.  The type name parameter may be a fully-qualified
     * name.  In this case, the catalog and schemaPattern parameters are
     * ignored.
     * <p/>
     * <P>Each type description has the following columns:
     * <OL>
     * <LI><B>TYPE_CAT</B> String => the type's catalog (may be <code>null</code>)
     * <LI><B>TYPE_SCHEM</B> String => type's schema (may be <code>null</code>)
     * <LI><B>TYPE_NAME</B> String => type name
     * <LI><B>CLASS_NAME</B> String => Java class name
     * <LI><B>DATA_TYPE</B> int => type value defined in java.sql.Types.
     * One of JAVA_OBJECT, STRUCT, or DISTINCT
     * <LI><B>REMARKS</B> String => explanatory comment on the type
     * <LI><B>BASE_TYPE</B> short => type code of the source type of a
     * DISTINCT type or the type that implements the user-generated
     * reference type of the SELF_REFERENCING_COLUMN of a structured
     * type as defined in java.sql.Types (<code>null</code> if DATA_TYPE is not
     * DISTINCT or not STRUCT with REFERENCE_GENERATION = USER_DEFINED)
     * </OL>
     * <p/>
     * <P><B>Note:</B> If the driver does not support UDTs, an empty
     * result set is returned.
     *
     * @param catalog         a catalog name; must match the catalog name as it
     *                        is stored in the database; "" retrieves those without a catalog;
     *                        <code>null</code> means that the catalog name should not be used to narrow
     *                        the search
     * @param schemaPattern   a schema pattern name; must match the schema name
     *                        as it is stored in the database; "" retrieves those without a schema;
     *                        <code>null</code> means that the schema name should not be used to narrow
     *                        the search
     * @param typeNamePattern a type name pattern; must match the type name
     *                        as it is stored in the database; may be a fully qualified name
     * @param types           a list of user-defined types (JAVA_OBJECT,
     *                        STRUCT, or DISTINCT) to include; <code>null</code> returns all types
     * @return <code>ResultSet</code> object in which each row describes a UDT
     * @throws java.sql.SQLException if a database access error occurs
     * @since 1.2
     */
    public ResultSet getUDTs(String catalog, String schemaPattern, String typeNamePattern, int[] types) throws SQLException {
        return databaseMetaData.getUDTs(catalog, schemaPattern, typeNamePattern, types);
    }

    /**
     * Retrieves the connection that produced this metadata object.
     * <p/>
     *
     * @return the connection that produced this metadata object
     * @throws java.sql.SQLException if a database access error occurs
     * @since 1.2
     */
    public Connection getConnection() throws SQLException {
        return connection;
    }

    /**
     * Returns the actual connection that produced this metadata object<br>
     * @return Connection
     * @throws SQLException
     */
    public Connection getActualConnection() throws SQLException {
        return databaseMetaData.getConnection();
    }

    /**
     * Retrieves whether this database supports savepoints.
     *
     * @return <code>true</code> if savepoints are supported;
     *         <code>false</code> otherwise
     * @throws java.sql.SQLException if a database access error occurs
     * @since 1.4
     */
    public boolean supportsSavepoints() throws SQLException {
        return databaseMetaData.supportsSavepoints();
    }

    /**
     * Retrieves whether this database supports named parameters to callable
     * statements.
     *
     * @return <code>true</code> if named parameters are supported;
     *         <code>false</code> otherwise
     * @throws java.sql.SQLException if a database access error occurs
     * @since 1.4
     */
    public boolean supportsNamedParameters() throws SQLException {
        return databaseMetaData.supportsNamedParameters();
    }

    /**
     * Retrieves whether it is possible to have multiple <code>ResultSet</code> objects
     * returned from a <code>CallableStatement</code> object
     * simultaneously.
     *
     * @return <code>true</code> if a <code>CallableStatement</code> object
     *         can return multiple <code>ResultSet</code> objects
     *         simultaneously; <code>false</code> otherwise
     * @throws java.sql.SQLException if a datanase access error occurs
     * @since 1.4
     */
    public boolean supportsMultipleOpenResults() throws SQLException {
        return databaseMetaData.supportsMultipleOpenResults();
    }

    /**
     * Retrieves whether auto-generated keys can be retrieved after
     * a statement has been executed.
     *
     * @return <code>true</code> if auto-generated keys can be retrieved
     *         after a statement has executed; <code>false</code> otherwise
     * @throws java.sql.SQLException if a database access error occurs
     * @since 1.4
     */
    public boolean supportsGetGeneratedKeys() throws SQLException {
        return databaseMetaData.supportsGetGeneratedKeys();
    }

    /**
     * Retrieves a description of the user-defined type (UDT) hierarchies defined in a
     * particular schema in this database. Only the immediate super type/
     * sub type relationship is modeled.
     * <p/>
     * Only supertype information for UDTs matching the catalog,
     * schema, and type name is returned. The type name parameter
     * may be a fully-qualified name. When the UDT name supplied is a
     * fully-qualified name, the catalog and schemaPattern parameters are
     * ignored.
     * <p/>
     * If a UDT does not have a direct super type, it is not listed here.
     * A row of the <code>ResultSet</code> object returned by this method
     * describes the designated UDT and a direct supertype. A row has the following
     * columns:
     * <OL>
     * <LI><B>TYPE_CAT</B> String => the UDT's catalog (may be <code>null</code>)
     * <LI><B>TYPE_SCHEM</B> String => UDT's schema (may be <code>null</code>)
     * <LI><B>TYPE_NAME</B> String => type name of the UDT
     * <LI><B>SUPERTYPE_CAT</B> String => the direct super type's catalog
     * (may be <code>null</code>)
     * <LI><B>SUPERTYPE_SCHEM</B> String => the direct super type's schema
     * (may be <code>null</code>)
     * <LI><B>SUPERTYPE_NAME</B> String => the direct super type's name
     * </OL>
     * <p/>
     * <P><B>Note:</B> If the driver does not support type hierarchies, an
     * empty result set is returned.
     *
     * @param catalog         a catalog name; "" retrieves those without a catalog;
     *                        <code>null</code> means drop catalog name from the selection criteria
     * @param schemaPattern   a schema name pattern; "" retrieves those
     *                        without a schema
     * @param typeNamePattern a UDT name pattern; may be a fully-qualified
     *                        name
     * @return a <code>ResultSet</code> object in which a row gives information
     *         about the designated UDT
     * @throws java.sql.SQLException if a database access error occurs
     * @since 1.4
     */
    public ResultSet getSuperTypes(String catalog, String schemaPattern, String typeNamePattern) throws SQLException {
        return databaseMetaData.getSuperTypes(catalog, schemaPattern, typeNamePattern);
    }

    /**
     * Retrieves a description of the table hierarchies defined in a particular
     * schema in this database.
     * <p/>
     * <P>Only supertable information for tables matching the catalog, schema
     * and table name are returned. The table name parameter may be a fully-
     * qualified name, in which case, the catalog and schemaPattern parameters
     * are ignored. If a table does not have a super table, it is not listed here.
     * Supertables have to be defined in the same catalog and schema as the
     * sub tables. Therefore, the type description does not need to include
     * this information for the supertable.
     * <p/>
     * <P>Each type description has the following columns:
     * <OL>
     * <LI><B>TABLE_CAT</B> String => the type's catalog (may be <code>null</code>)
     * <LI><B>TABLE_SCHEM</B> String => type's schema (may be <code>null</code>)
     * <LI><B>TABLE_NAME</B> String => type name
     * <LI><B>SUPERTABLE_NAME</B> String => the direct super type's name
     * </OL>
     * <p/>
     * <P><B>Note:</B> If the driver does not support type hierarchies, an
     * empty result set is returned.
     *
     * @param catalog          a catalog name; "" retrieves those without a catalog;
     *                         <code>null</code> means drop catalog name from the selection criteria
     * @param schemaPattern    a schema name pattern; "" retrieves those
     *                         without a schema
     * @param tableNamePattern a table name pattern; may be a fully-qualified
     *                         name
     * @return a <code>ResultSet</code> object in which each row is a type description
     * @throws java.sql.SQLException if a database access error occurs
     * @since 1.4
     */
    public ResultSet getSuperTables(String catalog, String schemaPattern, String tableNamePattern) throws SQLException {
        return databaseMetaData.getSuperTables(catalog, schemaPattern, tableNamePattern);
    }

    /**
     * Retrieves a description of the given attribute of the given type
     * for a user-defined type (UDT) that is available in the given schema
     * and catalog.
     * <p/>
     * Descriptions are returned only for attributes of UDTs matching the
     * catalog, schema, type, and attribute name criteria. They are ordered by
     * TYPE_SCHEM, TYPE_NAME and ORDINAL_POSITION. This description
     * does not contain inherited attributes.
     * <p/>
     * The <code>ResultSet</code> object that is returned has the following
     * columns:
     * <OL>
     * <LI><B>TYPE_CAT</B> String => type catalog (may be <code>null</code>)
     * <LI><B>TYPE_SCHEM</B> String => type schema (may be <code>null</code>)
     * <LI><B>TYPE_NAME</B> String => type name
     * <LI><B>ATTR_NAME</B> String => attribute name
     * <LI><B>DATA_TYPE</B> int => attribute type SQL type from java.sql.Types
     * <LI><B>ATTR_TYPE_NAME</B> String => Data source dependent type name.
     * For a UDT, the type name is fully qualified. For a REF, the type name is
     * fully qualified and represents the target type of the reference type.
     * <LI><B>ATTR_SIZE</B> int => column size.  For char or date
     * types this is the maximum number of characters; for numeric or
     * decimal types this is precision.
     * <LI><B>DECIMAL_DIGITS</B> int => the number of fractional digits
     * <LI><B>NUM_PREC_RADIX</B> int => Radix (typically either 10 or 2)
     * <LI><B>NULLABLE</B> int => whether NULL is allowed
     * <UL>
     * <LI> attributeNoNulls - might not allow NULL values
     * <LI> attributeNullable - definitely allows NULL values
     * <LI> attributeNullableUnknown - nullability unknown
     * </UL>
     * <LI><B>REMARKS</B> String => comment describing column (may be <code>null</code>)
     * <LI><B>ATTR_DEF</B> String => default value (may be <code>null</code>)
     * <LI><B>SQL_DATA_TYPE</B> int => unused
     * <LI><B>SQL_DATETIME_SUB</B> int => unused
     * <LI><B>CHAR_OCTET_LENGTH</B> int => for char types the
     * maximum number of bytes in the column
     * <LI><B>ORDINAL_POSITION</B> int	=> index of column in table
     * (starting at 1)
     * <LI><B>IS_NULLABLE</B> String => "NO" means column definitely
     * does not allow NULL values; "YES" means the column might
     * allow NULL values.  An empty string means unknown.
     * <LI><B>SCOPE_CATALOG</B> String => catalog of table that is the
     * scope of a reference attribute (<code>null</code> if DATA_TYPE isn't REF)
     * <LI><B>SCOPE_SCHEMA</B> String => schema of table that is the
     * scope of a reference attribute (<code>null</code> if DATA_TYPE isn't REF)
     * <LI><B>SCOPE_TABLE</B> String => table name that is the scope of a
     * reference attribute (<code>null</code> if the DATA_TYPE isn't REF)
     * <LI><B>SOURCE_DATA_TYPE</B> short => source type of a distinct type or user-generated
     * Ref type,SQL type from java.sql.Types (<code>null</code> if DATA_TYPE
     * isn't DISTINCT or user-generated REF)
     * </OL>
     *
     * @param catalog              a catalog name; must match the catalog name as it
     *                             is stored in the database; "" retrieves those without a catalog;
     *                             <code>null</code> means that the catalog name should not be used to narrow
     *                             the search
     * @param schemaPattern        a schema name pattern; must match the schema name
     *                             as it is stored in the database; "" retrieves those without a schema;
     *                             <code>null</code> means that the schema name should not be used to narrow
     *                             the search
     * @param typeNamePattern      a type name pattern; must match the
     *                             type name as it is stored in the database
     * @param attributeNamePattern an attribute name pattern; must match the attribute
     *                             name as it is declared in the database
     * @return a <code>ResultSet</code> object in which each row is an
     *         attribute description
     * @throws java.sql.SQLException if a database access error occurs
     * @since 1.4
     */
    public ResultSet getAttributes(String catalog, String schemaPattern, String typeNamePattern,
                                   String attributeNamePattern) throws SQLException {
        return databaseMetaData.getAttributes(catalog, schemaPattern, typeNamePattern, attributeNamePattern);
    }

    /**
     * Retrieves whether this database supports the given result set holdability.
     *
     * @param holdability one of the following constants:
     *                    <code>ResultSet.HOLD_CURSORS_OVER_COMMIT</code> or
     *                    <code>ResultSet.CLOSE_CURSORS_AT_COMMIT<code>
     * @return <code>true</code> if so; <code>false</code> otherwise
     * @throws java.sql.SQLException if a database access error occurs
     * @see java.sql.Connection
     * @since 1.4
     */
    public boolean supportsResultSetHoldability(int holdability) throws SQLException {
        return databaseMetaData.supportsResultSetHoldability(holdability);
    }

    /**
     * Retrieves the default holdability of this <code>ResultSet</code>
     * object.
     *
     * @return the default holdability; either
     *         <code>ResultSet.HOLD_CURSORS_OVER_COMMIT</code> or
     *         <code>ResultSet.CLOSE_CURSORS_AT_COMMIT</code>
     * @throws java.sql.SQLException if a database access error occurs
     * @since 1.4
     */
    public int getResultSetHoldability() throws SQLException {
        return databaseMetaData.getResultSetHoldability();
    }

    /**
     * Retrieves the major version number of the underlying database.
     *
     * @return the underlying database's major version
     * @throws java.sql.SQLException if a database access error occurs
     * @since 1.4
     */
    public int getDatabaseMajorVersion() throws SQLException {
        return databaseMetaData.getDatabaseMajorVersion();
    }

    /**
     * Retrieves the minor version number of the underlying database.
     *
     * @return underlying database's minor version
     * @throws java.sql.SQLException if a database access error occurs
     * @since 1.4
     */
    public int getDatabaseMinorVersion() throws SQLException {
        return databaseMetaData.getDatabaseMinorVersion();
    }

    /**
     * Retrieves the major JDBC version number for this
     * driver.
     *
     * @return JDBC version major number
     * @throws java.sql.SQLException if a database access error occurs
     * @since 1.4
     */
    public int getJDBCMajorVersion() throws SQLException {
        return databaseMetaData.getJDBCMajorVersion();
    }

    /**
     * Retrieves the minor JDBC version number for this
     * driver.
     *
     * @return JDBC version minor number
     * @throws java.sql.SQLException if a database access error occurs
     * @since 1.4
     */
    public int getJDBCMinorVersion() throws SQLException {
        return databaseMetaData.getJDBCMinorVersion();
    }

    /**
     * Indicates whether the SQLSTATE returned by <code>SQLException.getSQLState</code>
     * is X/Open (now known as Open Group) SQL CLI or SQL99.
     *
     * @return the type of SQLSTATE; one of:
     *         sqlStateXOpen or
     *         sqlStateSQL99
     * @throws java.sql.SQLException if a database access error occurs
     * @since 1.4
     */
    public int getSQLStateType() throws SQLException {
        return databaseMetaData.getSQLStateType();
    }

    /**
     * Indicates whether updates made to a LOB are made on a copy or directly
     * to the LOB.
     *
     * @return <code>true</code> if updates are made to a copy of the LOB;
     *         <code>false</code> if updates are made directly to the LOB
     * @throws java.sql.SQLException if a database access error occurs
     * @since 1.4
     */
    public boolean locatorsUpdateCopy() throws SQLException {
        return databaseMetaData.locatorsUpdateCopy();
    }

    /**
     * Retrieves whether this database supports statement pooling.
     *
     * @return <code>true</code> if so; <code>false</code> otherwise
     * @throws SQLException if a database access error occurs
     * @since 1.4
     */
    public boolean supportsStatementPooling() throws SQLException {
        return databaseMetaData.supportsStatementPooling();
    }
}