/*
* @(#)Statement.java 1.40 03/12/19
*
* Copyright 2004 Sun Microsystems, Inc. All rights reserved.
* SUN PROPRIETARY/CONFIDENTIAL. Use is subject to license terms.
*/
package java.sql;
/**
* <P>The object used for executing a static SQL statement
* and returning the results it produces.
* <P>
* By default, only one <code>ResultSet</code> object per <code>Statement</code>
* object can be open at the same time. Therefore, if the reading of one
* <code>ResultSet</code> object is interleaved
* with the reading of another, each must have been generated by
* different <code>Statement</code> objects. All execution methods in the
* <code>Statement</code> interface implicitly close a statment's current
* <code>ResultSet</code> object if an open one exists.
*
* @see Connection#createStatement
* @see ResultSet
*/
public interface Statement {
/**
* Executes the given SQL statement, which returns a single
* <code>ResultSet</code> object.
*
* @param sql an SQL statement to be sent to the database, typically a
* static SQL <code>SELECT</code> statement
* @return a <code>ResultSet</code> object that contains the data produced
* by the given query; never <code>null</code>
* @exception SQLException if a database access error occurs or the given
* SQL statement produces anything other than a single
* <code>ResultSet</code> object
*/
ResultSet executeQuery(String sql) throws SQLException;
/**
* Executes the given SQL statement, which may be an <code>INSERT</code>,
* <code>UPDATE</code>, or <code>DELETE</code> statement or an
* SQL statement that returns nothing, such as an SQL DDL statement.
*
* @param sql an SQL <code>INSERT</code>, <code>UPDATE</code> or
* <code>DELETE</code> statement or an SQL statement that returns nothing
* @return either the row count for <code>INSERT</code>, <code>UPDATE</code>
* or <code>DELETE</code> statements, or <code>0</code> for SQL statements
* that return nothing
* @exception SQLException if a database access error occurs or the given
* SQL statement produces a <code>ResultSet</code> object
*/
int executeUpdate(String sql) throws SQLException;
/**
* Releases this <code>Statement</code> object's database
* and JDBC resources immediately instead of waiting for
* this to happen when it is automatically closed.
* It is generally good practice to release resources as soon as
* you are finished with them to avoid tying up database
* resources.
* <P>
* Calling the method <code>close</code> on a <code>Statement</code>
* object that is already closed has no effect.
* <P>
* <B>Note:</B> A <code>Statement</code> object is automatically closed
* when it is garbage collected. When a <code>Statement</code> object is
* closed, its current <code>ResultSet</code> object, if one exists, is
* also closed.
*
* @exception SQLException if a database access error occurs
*/
void close() throws SQLException;
//----------------------------------------------------------------------
/**
* Retrieves the maximum number of bytes that can be
* returned for character and binary column values in a <code>ResultSet</code>
* object produced by this <code>Statement</code> object.
* This limit applies only to <code>BINARY</code>,
* <code>VARBINARY</code>, <code>LONGVARBINARY</code>, <code>CHAR</code>,
* <code>VARCHAR</code>, and <code>LONGVARCHAR</code>
* columns. If the limit is exceeded, the excess data is silently
* discarded.
*
* @return the current column size limit for columns storing character and
* binary values; zero means there is no limit
* @exception SQLException if a database access error occurs
* @see #setMaxFieldSize
*/
int getMaxFieldSize() throws SQLException;
/**
* Sets the limit for the maximum number of bytes in a <code>ResultSet</code>
* column storing character or binary values to
* the given number of bytes. This limit applies
* only to <code>BINARY</code>, <code>VARBINARY</code>,
* <code>LONGVARBINARY</code>, <code>CHAR</code>, <code>VARCHAR</code>, and
* <code>LONGVARCHAR</code> fields. If the limit is exceeded, the excess data
* is silently discarded. For maximum portability, use values
* greater than 256.
*
* @param max the new column size limit in bytes; zero means there is no limit
* @exception SQLException if a database access error occurs
* or the condition max >= 0 is not satisfied
* @see #getMaxFieldSize
*/
void setMaxFieldSize(int max) throws SQLException;
/**
* Retrieves the maximum number of rows that a
* <code>ResultSet</code> object produced by this
* <code>Statement</code> object can contain. If this limit is exceeded,
* the excess rows are silently dropped.
*
* @return the current maximum number of rows for a <code>ResultSet</code>
* object produced by this <code>Statement</code> object;
* zero means there is no limit
* @exception SQLException if a database access error occurs
* @see #setMaxRows
*/
int getMaxRows() throws SQLException;
/**
* Sets the limit for the maximum number of rows that any
* <code>ResultSet</code> object can contain to the given number.
* If the limit is exceeded, the excess
* rows are silently dropped.
*
* @param max the new max rows limit; zero means there is no limit
* @exception SQLException if a database access error occurs
* or the condition max >= 0 is not satisfied
* @see #getMaxRows
*/
void setMaxRows(int max) throws SQLException;
/**
* Sets escape processing on or off.
* If escape scanning is on (the default), the driver will do
* escape substitution before sending the SQL statement to the database.
*
* Note: Since prepared statements have usually been parsed prior
* to making this call, disabling escape processing for
* <code>PreparedStatements</code> objects will have no effect.
*
* @param enable <code>true</code> to enable escape processing;
* <code>false</code> to disable it
* @exception SQLException if a database access error occurs
*/
void setEscapeProcessing(boolean enable) throws SQLException;
/**
* Retrieves the number of seconds the driver will
* wait for a <code>Statement</code> object to execute. If the limit is exceeded, a
* <code>SQLException</code> is thrown.
*
* @return the current query timeout limit in seconds; zero means there is
* no limit
* @exception SQLException if a database access error occurs
* @see #setQueryTimeout
*/
int getQueryTimeout() throws SQLException;
/**
* Sets the number of seconds the driver will wait for a
* <code>Statement</code> object to execute to the given number of seconds.
* If the limit is exceeded, an <code>SQLException</code> is thrown.
*
* @param seconds the new query timeout limit in seconds; zero means
* there is no limit
* @exception SQLException if a database access error occurs
* or the condition seconds >= 0 is not satisfied
* @see #getQueryTimeout
*/
void setQueryTimeout(int seconds) throws SQLException;
/**
* Cancels this <code>Statement</code> object if both the DBMS and
* driver support aborting an SQL statement.
* This method can be used by one thread to cancel a statement that
* is being executed by another thread.
*
* @exception SQLException if a database access error occurs
*/
void cancel() throws SQLException;
/**
* Retrieves the first warning reported by calls on this <code>Statement</code> object.
* Subsequent <code>Statement</code> object warnings will be chained to this
* <code>SQLWarning</code> object.
*
* <p>The warning chain is automatically cleared each time
* a statement is (re)executed. This method may not be called on a closed
* <code>Statement</code> object; doing so will cause an <code>SQLException</code>
* to be thrown.
*
* <P><B>Note:</B> If you are processing a <code>ResultSet</code> object, any
* warnings associated with reads on that <code>ResultSet</code> object
* will be chained on it rather than on the <code>Statement</code>
* object that produced it.
*
* @return the first <code>SQLWarning</code> object or <code>null</code>
* if there are no warnings
* @exception SQLException if a database access error occurs or this
* method is called on a closed statement
*/
SQLWarning getWarnings() throws SQLException;
/**
* Clears all the warnings reported on this <code>Statement</code>
* object. After a call to this method,
* the method <code>getWarnings</code> will return
* <code>null</code> until a new warning is reported for this
* <code>Statement</code> object.
*
* @exception SQLException if a database access error occurs
*/
void clearWarnings() throws SQLException;
/**
* Sets the SQL cursor name to the given <code>String</code>, which
* will be used by subsequent <code>Statement</code> object
* <code>execute</code> methods. This name can then be
* used in SQL positioned update or delete statements to identify the
* current row in the <code>ResultSet</code> object generated by this
* statement. If the database does not support positioned update/delete,
* this method is a noop. To insure that a cursor has the proper isolation
* level to support updates, the cursor's <code>SELECT</code> statement
* should have the form <code>SELECT FOR UPDATE</code>. If
* <code>FOR UPDATE</code> is not present, positioned updates may fail.
*
* <P><B>Note:</B> By definition, the execution of positioned updates and
* deletes must be done by a different <code>Statement</code> object than
* the one that generated the <code>ResultSet</code> object being used for
* positioning. Also, cursor names must be unique within a connection.
*
* @param name the new cursor name, which must be unique within
* a connection
* @exception SQLException if a database access error occurs
*/
void setCursorName(String name) throws SQLException;
//----------------------- Multiple Results --------------------------
/**
* Executes the given SQL statement, which may return multiple results.
* In some (uncommon) situations, a single SQL statement may return
* multiple result sets and/or update counts. Normally you can ignore
* this unless you are (1) executing a stored procedure that you know may
* return multiple results or (2) you are dynamically executing an
* unknown SQL string.
* <P>
* The <code>execute</code> method executes an SQL statement and indicates the
* form of the first result. You must then use the methods
* <code>getResultSet</code> or <code>getUpdateCount</code>
* to retrieve the result, and <code>getMoreResults</code> to
* move to any subsequent result(s).
*
* @param sql any SQL statement
* @return <code>true</code> if the first result is a <code>ResultSet</code>
* object; <code>false</code> if it is an update count or there are
* no results
* @exception SQLException if a database access error occurs
* @see #getResultSet
* @see #getUpdateCount
* @see #getMoreResults
*/
boolean execute(String sql) throws SQLException;
/**
* Retrieves the current result as a <code>ResultSet</code> object.
* This method should be called only once per result.
*
* @return the current result as a <code>ResultSet</code> object or
* <code>null</code> if the result is an update count or there are no more results
* @exception SQLException if a database access error occurs
* @see #execute
*/
ResultSet getResultSet() throws SQLException;
/**
* Retrieves the current result as an update count;
* if the result is a <code>ResultSet</code> object or there are no more results, -1
* is returned. This method should be called only once per result.
*
* @return the current result as an update count; -1 if the current result is a
* <code>ResultSet</code> object or there are no more results
* @exception SQLException if a database access error occurs
* @see #execute
*/
int getUpdateCount() throws SQLException;
/**
* Moves to this <code>Statement</code> object's next result, returns
* <code>true</code> if it is a <code>ResultSet</code> object, and
* implicitly closes any current <code>ResultSet</code>
* object(s) obtained with the method <code>getResultSet</code>.
*
* <P>There are no more results when the following is true:
* <PRE>
* // stmt is a Statement object
* ((stmt.getMoreResults() == false) && (stmt.getUpdateCount() == -1))
* </PRE>
*
* @return <code>true</code> if the next result is a <code>ResultSet</code>
* object; <code>false</code> if it is an update count or there are
* no more results
* @exception SQLException if a database access error occurs
* @see #execute
*/
boolean getMoreResults() throws SQLException;
//--------------------------JDBC 2.0-----------------------------
/**
* Gives the driver a hint as to the direction in which
* rows will be processed in <code>ResultSet</code>
* objects created using this <code>Statement</code> object. The
* default value is <code>ResultSet.FETCH_FORWARD</code>.
* <P>
* Note that this method sets the default fetch direction for
* result sets generated by this <code>Statement</code> object.
* Each result set has its own methods for getting and setting
* its own fetch direction.
*
* @param direction the initial direction for processing rows
* @exception SQLException if a database access error occurs
* or the given direction
* is not one of <code>ResultSet.FETCH_FORWARD</code>,
* <code>ResultSet.FETCH_REVERSE</code>, or <code>ResultSet.FETCH_UNKNOWN</code>
* @since 1.2
* @see #getFetchDirection
*/
void setFetchDirection(int direction) throws SQLException;
/**
* Retrieves the direction for fetching rows from
* database tables that is the default for result sets
* generated from this <code>Statement</code> object.
* If this <code>Statement</code> object has not set
* a fetch direction by calling the method <code>setFetchDirection</code>,
* the return value is implementation-specific.
*
* @return the default fetch direction for result sets generated
* from this <code>Statement</code> object
* @exception SQLException if a database access error occurs
* @since 1.2
* @see #setFetchDirection
*/
int getFetchDirection() throws SQLException;
/**
* Gives the JDBC driver a hint as to the number of rows that should
* be fetched from the database when more rows are needed. The number
* of rows specified affects only result sets created using this
* statement. If the value specified is zero, then the hint is ignored.
* The default value is zero.
*
* @param rows the number of rows to fetch
* @exception SQLException if a database access error occurs, or the
* condition 0 <= <code>rows</code> <= <code>this.getMaxRows()</code>
* is not satisfied.
* @since 1.2
* @see #getFetchSize
*/
void setFetchSize(int rows) throws SQLException;
/**
* Retrieves the number of result set rows that is the default
* fetch size for <code>ResultSet</code> objects
* generated from this <code>Statement</code> object.
* If this <code>Statement</code> object has not set
* a fetch size by calling the method <code>setFetchSize</code>,
* the return value is implementation-specific.
*
* @return the default fetch size for result sets generated
* from this <code>Statement</code> object
* @exception SQLException if a database access error occurs
* @since 1.2
* @see #setFetchSize
*/
int getFetchSize() throws SQLException;
/**
* Retrieves the result set concurrency for <code>ResultSet</code> objects
* generated by this <code>Statement</code> object.
*
* @return either <code>ResultSet.CONCUR_READ_ONLY</code> or
* <code>ResultSet.CONCUR_UPDATABLE</code>
* @exception SQLException if a database access error occurs
* @since 1.2
*/
int getResultSetConcurrency() throws SQLException;
/**
* Retrieves the result set type for <code>ResultSet</code> objects
* generated by this <code>Statement</code> object.
*
* @return one of <code>ResultSet.TYPE_FORWARD_ONLY</code>,
* <code>ResultSet.TYPE_SCROLL_INSENSITIVE</code>, or
* <code>ResultSet.TYPE_SCROLL_SENSITIVE</code>
* @exception SQLException if a database access error occurs
* @since 1.2
*/
int getResultSetType() throws SQLException;
/**
* Adds the given SQL command to the current list of commmands for this
* <code>Statement</code> object. The commands in this list can be
* executed as a batch by calling the method <code>executeBatch</code>.
* <P>
* <B>NOTE:</B> This method is optional.
*
* @param sql typically this is a static SQL <code>INSERT</code> or
* <code>UPDATE</code> statement
* @exception SQLException if a database access error occurs, or the
* driver does not support batch updates
* @see #executeBatch
* @since 1.2
*/
void addBatch( String sql ) throws SQLException;
/**
* Empties this <code>Statement</code> object's current list of
* SQL commands.
* <P>
* <B>NOTE:</B> This method is optional.
*
* @exception SQLException if a database access error occurs or the
* driver does not support batch updates
* @see #addBatch
* @since 1.2
*/
void clearBatch() throws SQLException;
/**
* Submits a batch of commands to the database for execution and
* if all commands execute successfully, returns an array of update counts.
* The <code>int</code> elements of the array that is returned are ordered
* to correspond to the commands in the batch, which are ordered
* according to the order in which they were added to the batch.
* The elements in the array returned by the method <code>executeBatch</code>
* may be one of the following:
* <OL>
* <LI>A number greater than or equal to zero -- indicates that the
* command was processed successfully and is an update count giving the
* number of rows in the database that were affected by the command's
* execution
* <LI>A value of <code>SUCCESS_NO_INFO</code> -- indicates that the command was
* processed successfully but that the number of rows affected is
* unknown
* <P>
* If one of the commands in a batch update fails to execute properly,
* this method throws a <code>BatchUpdateException</code>, and a JDBC
* driver may or may not continue to process the remaining commands in
* the batch. However, the driver's behavior must be consistent with a
* particular DBMS, either always continuing to process commands or never
* continuing to process commands. If the driver continues processing
* after a failure, the array returned by the method
* <code>BatchUpdateException.getUpdateCounts</code>
* will contain as many elements as there are commands in the batch, and
* at least one of the elements will be the following:
* <P>
* <LI>A value of <code>EXECUTE_FAILED</code> -- indicates that the command failed
* to execute successfully and occurs only if a driver continues to
* process commands after a command fails
* </OL>
* <P>
* A driver is not required to implement this method.
* The possible implementations and return values have been modified in
* the Java 2 SDK, Standard Edition, version 1.3 to
* accommodate the option of continuing to proccess commands in a batch
* update after a <code>BatchUpdateException</code> obejct has been thrown.
*
* @return an array of update counts containing one element for each
* command in the batch. The elements of the array are ordered according
* to the order in which commands were added to the batch.
* @exception SQLException if a database access error occurs or the
* driver does not support batch statements. Throws {@link BatchUpdateException}
* (a subclass of <code>SQLException</code>) if one of the commands sent to the
* database fails to execute properly or attempts to return a result set.
* @since 1.3
*/
int[] executeBatch() throws SQLException;
/**
* Retrieves the <code>Connection</code> object
* that produced this <code>Statement</code> object.
* @return the connection that produced this statement
* @exception SQLException if a database access error occurs
* @since 1.2
*/
Connection getConnection() throws SQLException;
//--------------------------JDBC 3.0-----------------------------
/**
* The constant indicating that the current <code>ResultSet</code> object
* should be closed when calling <code>getMoreResults</code>.
*
* @since 1.4
*/
int CLOSE_CURRENT_RESULT = 1;
/**
* The constant indicating that the current <code>ResultSet</code> object
* should not be closed when calling <code>getMoreResults</code>.
*
* @since 1.4
*/
int KEEP_CURRENT_RESULT = 2;
/**
* The constant indicating that all <code>ResultSet</code> objects that
* have previously been kept open should be closed when calling
* <code>getMoreResults</code>.
*
* @since 1.4
*/
int CLOSE_ALL_RESULTS = 3;
/**
* The constant indicating that a batch statement executed successfully
* but that no count of the number of rows it affected is available.
*
* @since 1.4
*/
int SUCCESS_NO_INFO = -2;
/**
* The constant indicating that an error occured while executing a
* batch statement.
*
* @since 1.4
*/
int EXECUTE_FAILED = -3;
/**
* The constant indicating that generated keys should be made
* available for retrieval.
*
* @since 1.4
*/
int RETURN_GENERATED_KEYS = 1;
/**
* The constant indicating that generated keys should not be made
* available for retrieval.
*
* @since 1.4
*/
int NO_GENERATED_KEYS = 2;
/**
* Moves to this <code>Statement</code> object's next result, deals with
* any current <code>ResultSet</code> object(s) according to the instructions
* specified by the given flag, and returns
* <code>true</code> if the next result is a <code>ResultSet</code> object.
*
* <P>There are no more results when the following is true:
* <PRE>
* // stmt is a Statement object
* ((stmt.getMoreResults() == false) && (stmt.getUpdateCount() == -1))
* </PRE>
*
* @param current one of the following <code>Statement</code>
* constants indicating what should happen to current
* <code>ResultSet</code> objects obtained using the method
* <code>getResultSet</code>:
* <code>Statement.CLOSE_CURRENT_RESULT</code>,
* <code>Statement.KEEP_CURRENT_RESULT</code>, or
* <code>Statement.CLOSE_ALL_RESULTS</code>
* @return <code>true</code> if the next result is a <code>ResultSet</code>
* object; <code>false</code> if it is an update count or there are no
* more results
* @exception SQLException if a database access error occurs or the argument
* supplied is not one of the following:
* <code>Statement.CLOSE_CURRENT_RESULT</code>,
* <code>Statement.KEEP_CURRENT_RESULT</code>, or
* <code>Statement.CLOSE_ALL_RESULTS</code>
* @since 1.4
* @see #execute
*/
boolean getMoreResults(int current) throws SQLException;
/**
* Retrieves any auto-generated keys created as a result of executing this
* <code>Statement</code> object. If this <code>Statement</code> object did
* not generate any keys, an empty <code>ResultSet</code>
* object is returned.
*
* @return a <code>ResultSet</code> object containing the auto-generated key(s)
* generated by the execution of this <code>Statement</code> object
* @exception SQLException if a database access error occurs
* @since 1.4
*/
ResultSet getGeneratedKeys() throws SQLException;
/**
* Executes the given SQL statement and signals the driver with the
* given flag about whether the
* auto-generated keys produced by this <code>Statement</code> object
* should be made available for retrieval.
*
* @param sql must be an SQL <code>INSERT</code>, <code>UPDATE</code> or
* <code>DELETE</code> statement or an SQL statement that
* returns nothing
* @param autoGeneratedKeys a flag indicating whether auto-generated keys
* should be made available for retrieval;
* one of the following constants:
* <code>Statement.RETURN_GENERATED_KEYS</code>
* <code>Statement.NO_GENERATED_KEYS</code>
* @return either the row count for <code>INSERT</code>, <code>UPDATE</code>
* or <code>DELETE</code> statements, or <code>0</code> for SQL
* statements that return nothing
* @exception SQLException if a database access error occurs, the given
* SQL statement returns a <code>ResultSet</code> object, or
* the given constant is not one of those allowed
* @since 1.4
*/
int executeUpdate(String sql, int autoGeneratedKeys) throws SQLException;
/**
* Executes the given SQL statement and signals the driver that the
* auto-generated keys indicated in the given array should be made available
* for retrieval. The driver will ignore the array if the SQL statement
* is not an <code>INSERT</code> statement.
*
* @param sql an SQL <code>INSERT</code>, <code>UPDATE</code> or
* <code>DELETE</code> statement or an SQL statement that returns nothing,
* such as an SQL DDL statement
* @param columnIndexes an array of column indexes indicating the columns
* that should be returned from the inserted row
* @return either the row count for <code>INSERT</code>, <code>UPDATE</code>,
* or <code>DELETE</code> statements, or 0 for SQL statements
* that return nothing
* @exception SQLException if a database access error occurs, the SQL
* statement returns a <code>ResultSet</code> object, or the
* second argument supplied to this method is not an <code>int</code> array
* whose elements are valid column indexes
* @since 1.4
*/
int executeUpdate(String sql, int columnIndexes[]) throws SQLException;
/**
* Executes the given SQL statement and signals the driver that the
* auto-generated keys indicated in the given array should be made available
* for retrieval. The driver will ignore the array if the SQL statement
* is not an <code>INSERT</code> statement.
*
* @param sql an SQL <code>INSERT</code>, <code>UPDATE</code> or
* <code>DELETE</code> statement or an SQL statement that returns nothing
* @param columnNames an array of the names of the columns that should be
* returned from the inserted row
* @return either the row count for <code>INSERT</code>, <code>UPDATE</code>,
* or <code>DELETE</code> statements, or 0 for SQL statements
* that return nothing
* @exception SQLException if a database access error occurs, the SQL
* statement returns a <code>ResultSet</code> object, or the
* second argument supplied to this method is not a <code>String</code> array
* whose elements are valid column names
*
* @since 1.4
*/
int executeUpdate(String sql, String columnNames[]) throws SQLException;
/**
* Executes the given SQL statement, which may return multiple results,
* and signals the driver that any
* auto-generated keys should be made available
* for retrieval. The driver will ignore this signal if the SQL statement
* is not an <code>INSERT</code> statement.
* <P>
* In some (uncommon) situations, a single SQL statement may return
* multiple result sets and/or update counts. Normally you can ignore
* this unless you are (1) executing a stored procedure that you know may
* return multiple results or (2) you are dynamically executing an
* unknown SQL string.
* <P>
* The <code>execute</code> method executes an SQL statement and indicates the
* form of the first result. You must then use the methods
* <code>getResultSet</code> or <code>getUpdateCount</code>
* to retrieve the result, and <code>getMoreResults</code> to
* move to any subsequent result(s).
*
* @param sql any SQL statement
* @param autoGeneratedKeys a constant indicating whether auto-generated
* keys should be made available for retrieval using the method
* <code>getGeneratedKeys</code>; one of the following constants:
* <code>Statement.RETURN_GENERATED_KEYS</code> or
* <code>Statement.NO_GENERATED_KEYS</code>
* @return <code>true</code> if the first result is a <code>ResultSet</code>
* object; <code>false</code> if it is an update count or there are
* no results
* @exception SQLException if a database access error occurs or the second
* parameter supplied to this method is not
* <code>Statement.RETURN_GENERATED_KEYS</code> or
* <code>Statement.NO_GENERATED_KEYS</code>.
* @see #getResultSet
* @see #getUpdateCount
* @see #getMoreResults
* @see #getGeneratedKeys
*
* @since 1.4
*/
boolean execute(String sql, int autoGeneratedKeys) throws SQLException;
/**
* Executes the given SQL statement, which may return multiple results,
* and signals the driver that the
* auto-generated keys indicated in the given array should be made available
* for retrieval. This array contains the indexes of the columns in the
* target table that contain the auto-generated keys that should be made
* available. The driver will ignore the array if the given SQL statement
* is not an <code>INSERT</code> statement.
* <P>
* Under some (uncommon) situations, a single SQL statement may return
* multiple result sets and/or update counts. Normally you can ignore
* this unless you are (1) executing a stored procedure that you know may
* return multiple results or (2) you are dynamically executing an
* unknown SQL string.
* <P>
* The <code>execute</code> method executes an SQL statement and indicates the
* form of the first result. You must then use the methods
* <code>getResultSet</code> or <code>getUpdateCount</code>
* to retrieve the result, and <code>getMoreResults</code> to
* move to any subsequent result(s).
*
* @param sql any SQL statement
* @param columnIndexes an array of the indexes of the columns in the
* inserted row that should be made available for retrieval by a
* call to the method <code>getGeneratedKeys</code>
* @return <code>true</code> if the first result is a <code>ResultSet</code>
* object; <code>false</code> if it is an update count or there
* are no results
* @exception SQLException if a database access error occurs or the
* elements in the <code>int</code> array passed to this method
* are not valid column indexes
* @see #getResultSet
* @see #getUpdateCount
* @see #getMoreResults
*
* @since 1.4
*/
boolean execute(String sql, int columnIndexes[]) throws SQLException;
/**
* Executes the given SQL statement, which may return multiple results,
* and signals the driver that the
* auto-generated keys indicated in the given array should be made available
* for retrieval. This array contains the names of the columns in the
* target table that contain the auto-generated keys that should be made
* available. The driver will ignore the array if the given SQL statement
* is not an <code>INSERT</code> statement.
* <P>
* In some (uncommon) situations, a single SQL statement may return
* multiple result sets and/or update counts. Normally you can ignore
* this unless you are (1) executing a stored procedure that you know may
* return multiple results or (2) you are dynamically executing an
* unknown SQL string.
* <P>
* The <code>execute</code> method executes an SQL statement and indicates the
* form of the first result. You must then use the methods
* <code>getResultSet</code> or <code>getUpdateCount</code>
* to retrieve the result, and <code>getMoreResults</code> to
* move to any subsequent result(s).
*
* @param sql any SQL statement
* @param columnNames an array of the names of the columns in the inserted
* row that should be made available for retrieval by a call to the
* method <code>getGeneratedKeys</code>
* @return <code>true</code> if the next result is a <code>ResultSet</code>
* object; <code>false</code> if it is an update count or there
* are no more results
* @exception SQLException if a database access error occurs or the
* elements of the <code>String</code> array passed to this
* method are not valid column names
* @see #getResultSet
* @see #getUpdateCount
* @see #getMoreResults
* @see #getGeneratedKeys
*
* @since 1.4
*/
boolean execute(String sql, String columnNames[]) throws SQLException;
/**
* Retrieves the result set holdability for <code>ResultSet</code> objects
* generated by this <code>Statement</code> object.
*
* @return either <code>ResultSet.HOLD_CURSORS_OVER_COMMIT</code> or
* <code>ResultSet.CLOSE_CURSORS_AT_COMMIT</code>
* @exception SQLException if a database access error occurs
*
* @since 1.4
*/
int getResultSetHoldability() throws SQLException;
}
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