File	Doc	Category	Size	Date	Package
HSQLDialect.java	API Doc	Hibernate 3.2.5	12616	Thu Mar 15 04:33:16 GMT 2007	org.hibernate.dialect

HSQLDialect

• java.lang.Object
  • Dialect

Fields Summary
private static final Log	log
private boolean	schemaSupport
private static org.hibernate.exception.ViolatedConstraintNameExtracter	EXTRACTER

Constructors Summary

public HSQLDialect() super(); registerColumnType( Types.BIGINT, "bigint" ); registerColumnType( Types.BINARY, "binary" ); registerColumnType( Types.BIT, "bit" ); registerColumnType( Types.CHAR, "char(1)" ); registerColumnType( Types.DATE, "date" ); registerColumnType( Types.DECIMAL, "decimal" ); registerColumnType( Types.DOUBLE, "double" ); registerColumnType( Types.FLOAT, "float" ); registerColumnType( Types.INTEGER, "integer" ); registerColumnType( Types.LONGVARBINARY, "longvarbinary" ); registerColumnType( Types.LONGVARCHAR, "longvarchar" ); registerColumnType( Types.SMALLINT, "smallint" ); registerColumnType( Types.TINYINT, "tinyint" ); registerColumnType( Types.TIME, "time" ); registerColumnType( Types.TIMESTAMP, "timestamp" ); registerColumnType( Types.VARCHAR, "varchar($l)" ); registerColumnType( Types.VARBINARY, "varbinary($l)" ); registerColumnType( Types.NUMERIC, "numeric" ); //HSQL has no Blob/Clob support .... but just put these here for now! registerColumnType( Types.BLOB, "longvarbinary" ); registerColumnType( Types.CLOB, "longvarchar" ); registerFunction( "ascii", new StandardSQLFunction( "ascii", Hibernate.INTEGER ) ); registerFunction( "char", new StandardSQLFunction( "char", Hibernate.CHARACTER ) ); registerFunction( "length", new StandardSQLFunction( "length", Hibernate.LONG ) ); registerFunction( "lower", new StandardSQLFunction( "lower" ) ); registerFunction( "upper", new StandardSQLFunction( "upper" ) ); registerFunction( "lcase", new StandardSQLFunction( "lcase" ) ); registerFunction( "ucase", new StandardSQLFunction( "ucase" ) ); registerFunction( "soundex", new StandardSQLFunction( "soundex", Hibernate.STRING ) ); registerFunction( "ltrim", new StandardSQLFunction( "ltrim" ) ); registerFunction( "rtrim", new StandardSQLFunction( "rtrim" ) ); registerFunction( "reverse", new StandardSQLFunction( "reverse" ) ); registerFunction( "space", new StandardSQLFunction( "space", Hibernate.STRING ) ); registerFunction( "rawtohex", new StandardSQLFunction( "rawtohex" ) ); registerFunction( "hextoraw", new StandardSQLFunction( "hextoraw" ) ); registerFunction( "user", new NoArgSQLFunction( "user", Hibernate.STRING ) ); registerFunction( "database", new NoArgSQLFunction( "database", Hibernate.STRING ) ); registerFunction( "current_date", new NoArgSQLFunction( "current_date", Hibernate.DATE, false ) ); registerFunction( "curdate", new NoArgSQLFunction( "curdate", Hibernate.DATE ) ); registerFunction( "current_timestamp", new NoArgSQLFunction( "current_timestamp", Hibernate.TIMESTAMP, false ) ); registerFunction( "now", new NoArgSQLFunction( "now", Hibernate.TIMESTAMP ) ); registerFunction( "current_time", new NoArgSQLFunction( "current_time", Hibernate.TIME, false ) ); registerFunction( "curtime", new NoArgSQLFunction( "curtime", Hibernate.TIME ) ); registerFunction( "day", new StandardSQLFunction( "day", Hibernate.INTEGER ) ); registerFunction( "dayofweek", new StandardSQLFunction( "dayofweek", Hibernate.INTEGER ) ); registerFunction( "dayofyear", new StandardSQLFunction( "dayofyear", Hibernate.INTEGER ) ); registerFunction( "dayofmonth", new StandardSQLFunction( "dayofmonth", Hibernate.INTEGER ) ); registerFunction( "month", new StandardSQLFunction( "month", Hibernate.INTEGER ) ); registerFunction( "year", new StandardSQLFunction( "year", Hibernate.INTEGER ) ); registerFunction( "week", new StandardSQLFunction( "week", Hibernate.INTEGER ) ); registerFunction( "quater", new StandardSQLFunction( "quater", Hibernate.INTEGER ) ); registerFunction( "hour", new StandardSQLFunction( "hour", Hibernate.INTEGER ) ); registerFunction( "minute", new StandardSQLFunction( "minute", Hibernate.INTEGER ) ); registerFunction( "second", new StandardSQLFunction( "second", Hibernate.INTEGER ) ); registerFunction( "dayname", new StandardSQLFunction( "dayname", Hibernate.STRING ) ); registerFunction( "monthname", new StandardSQLFunction( "monthname", Hibernate.STRING ) ); registerFunction( "abs", new StandardSQLFunction( "abs" ) ); registerFunction( "sign", new StandardSQLFunction( "sign", Hibernate.INTEGER ) ); registerFunction( "acos", new StandardSQLFunction( "acos", Hibernate.DOUBLE ) ); registerFunction( "asin", new StandardSQLFunction( "asin", Hibernate.DOUBLE ) ); registerFunction( "atan", new StandardSQLFunction( "atan", Hibernate.DOUBLE ) ); registerFunction( "cos", new StandardSQLFunction( "cos", Hibernate.DOUBLE ) ); registerFunction( "cot", new StandardSQLFunction( "cot", Hibernate.DOUBLE ) ); registerFunction( "exp", new StandardSQLFunction( "exp", Hibernate.DOUBLE ) ); registerFunction( "log", new StandardSQLFunction( "log", Hibernate.DOUBLE ) ); registerFunction( "log10", new StandardSQLFunction( "log10", Hibernate.DOUBLE ) ); registerFunction( "sin", new StandardSQLFunction( "sin", Hibernate.DOUBLE ) ); registerFunction( "sqrt", new StandardSQLFunction( "sqrt", Hibernate.DOUBLE ) ); registerFunction( "tan", new StandardSQLFunction( "tan", Hibernate.DOUBLE ) ); registerFunction( "pi", new NoArgSQLFunction( "pi", Hibernate.DOUBLE ) ); registerFunction( "rand", new StandardSQLFunction( "rand", Hibernate.FLOAT ) ); registerFunction( "radians", new StandardSQLFunction( "radians", Hibernate.DOUBLE ) ); registerFunction( "degrees", new StandardSQLFunction( "degrees", Hibernate.DOUBLE ) ); registerFunction( "roundmagic", new StandardSQLFunction( "roundmagic" ) ); registerFunction( "ceiling", new StandardSQLFunction( "ceiling" ) ); registerFunction( "floor", new StandardSQLFunction( "floor" ) ); // Multi-param dialect functions... registerFunction( "mod", new StandardSQLFunction( "mod", Hibernate.INTEGER ) ); // function templates registerFunction( "concat", new VarArgsSQLFunction( Hibernate.STRING, "(", "||", ")" ) ); getDefaultProperties().setProperty( Environment.STATEMENT_BATCH_SIZE, DEFAULT_BATCH_SIZE ); try { // Does present HSQLDB Database class support schemas? // yuck! Perhaps we should think about a new dialect? Especially // if more things are going to break back-compat moving forward ReflectHelper.classForName( "org.hsqldb.Database" ).getDeclaredField( "schemaManager" ); schemaSupport = true; } catch (Throwable t) { schemaSupport = false; }

Methods Summary
public boolean	bindLimitParametersFirst() return true;
public java.lang.String	getAddColumnString() return "add column";
public java.lang.String[]	getCreateSequenceStrings(java.lang.String sequenceName) return getCreateSequenceStrings( sequenceName, 1, 1 );
public java.lang.String[]	getCreateSequenceStrings(java.lang.String sequenceName, int initialValue, int incrementSize) return new String[] { "create table dual_" + sequenceName + " (zero integer)", "insert into dual_" + sequenceName + " values (0)", "create sequence " + sequenceName + " start with " + initialValue + " increment by " + incrementSize };
public java.lang.String[]	getDropSequenceStrings(java.lang.String sequenceName) return new String[] { "drop table dual_" + sequenceName + " if exists", "drop sequence " + sequenceName };
public java.lang.String	getForUpdateString() return "";
public java.lang.String	getIdentityColumnString() return "generated by default as identity (start with 1)"; //not null is implicit
public java.lang.String	getIdentityInsertString() return "null";
public java.lang.String	getIdentitySelectString() return "call identity()";
public java.lang.String	getLimitString(java.lang.String sql, boolean hasOffset) return new StringBuffer( sql.length() + 10 ) .append( sql ) .insert( sql.toLowerCase().indexOf( "select" ) + 6, hasOffset ? " limit ? ?" : " top ?" ) .toString();
public org.hibernate.dialect.lock.LockingStrategy	getLockingStrategy(org.hibernate.persister.entity.Lockable lockable, org.hibernate.LockMode lockMode) // HSQLDB only supports READ_UNCOMMITTED transaction isolation return new ReadUncommittedLockingStrategy( lockable, lockMode );
public java.lang.String	getQuerySequencesString() if ( schemaSupport ) { return "select sequence_name from information_schema.system_sequences"; } else { return "select sequence_name from system_sequences"; }
public java.lang.String	getSelectSequenceNextValString(java.lang.String sequenceName) return "next value for " + sequenceName;
public java.lang.String	getSequenceNextValString(java.lang.String sequenceName) return "select next value for " + sequenceName + " from dual_" + sequenceName;
public org.hibernate.exception.ViolatedConstraintNameExtracter	getViolatedConstraintNameExtracter() return EXTRACTER;
public boolean	supportsColumnCheck() return false;
public boolean	supportsCurrentTimestampSelection() return false;
public boolean	supportsEmptyInList() return false;
public boolean	supportsIdentityColumns() return true;
public boolean	supportsIfExistsAfterTableName() return true;
public boolean	supportsLimit() return true;
public boolean	supportsLobValueChangePropogation() return false;
public boolean	supportsPooledSequences() return true;
public boolean	supportsSequences() return true;
public boolean	supportsTemporaryTables() HSQL does not really support temp tables; just take advantage of the fact that it is a single user db... return true;
public boolean	supportsUnique() return false;