org.exolab.castor.jdo.drivers
Class HsqlQueryExpression

java.lang.Object
  org.exolab.castor.jdo.drivers.JDBCQueryExpression
      org.exolab.castor.jdo.drivers.HsqlQueryExpression

All Implemented Interfaces:

QueryExpression

public final class HsqlQueryExpression

extends JDBCQueryExpression

QueryExpression for MySQL.

Version:

$Revision: 7116 $ $Date: 2005-07-05 07:25:41 -0600 (Tue, 05 Jul 2005) $

Author:

Oleg Nitz

Nested Class Summary

Nested classes inherited from class org.exolab.castor.jdo.drivers.JDBCQueryExpression

JDBCQueryExpression.Join

Field Summary

Fields inherited from class org.exolab.castor.jdo.drivers.JDBCQueryExpression

_dbInfo, _distinct, _factory, _joins, _limit, _offset, _order, _select, _tables

Fields inherited from interface org.exolab.castor.persist.spi.QueryExpression

OP_BETWEEN, OP_BETWEEN_AND, OP_EQUALS, OP_GREATER, OP_GREATER_EQUALS, OP_LESS, OP_LESS_EQUALS, OP_LIKE, OP_NOT_EQUALS, OP_NOT_LIKE

Constructor Summary

HsqlQueryExpression(PersistenceFactory factory)

Method Summary

protected java.lang.StringBuffer	getStandardStatement(boolean lock, boolean oj) Helper method.
java.lang.String	getStatement(boolean lock) Creates a SQL statement.
boolean	isLimitClauseSupported() Provides an implementation of QueryExpression#isLimitClauseSupported().
boolean	isOffsetClauseSupported() Provides an implementation of QueryExpression#isOffsetClauseSupported().

Methods inherited from class org.exolab.castor.jdo.drivers.JDBCQueryExpression

addColumn, addCondition, addInnerJoin, addInnerJoin, addInnerJoin, addInnerJoin, addLimitClause, addOffsetClause, addOrderClause, addOuterJoin, addOuterJoin, addOuterJoin, addOuterJoin, addParameter, addSelect, addTable, addTable, addWhereClause, addWhereClause, clone, encodeColumn, getColumnList, setDbMetaInfo, setDistinct, toString

Methods inherited from class java.lang.Object

equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Constructor Detail

HsqlQueryExpression

public HsqlQueryExpression(PersistenceFactory factory)

Method Detail

getStatement

public java.lang.String getStatement(boolean lock)

Description copied from class: JDBCQueryExpression

Creates a SQL statement. In general, for a RDBMS/JDBC driver with a full support of the SQL standard/JDBC specification, this will return a valid SQL statement. For some features, a particular RDBMS might indicate that it does not support this feature by throwing a SyntaxNotSupportedException.

Specified by:

getStatement in interface QueryExpression

Overrides:

getStatement in class JDBCQueryExpression

getStandardStatement

protected java.lang.StringBuffer getStandardStatement(boolean lock,
                                                      boolean oj)

Helper method. Can be used in two cases: 1) for JDBC drivers which support "{oj ...OUTER JOIN ...}" notation (in accordance with JDBC specification); 2) for the databases which support "... OUTER JOIN ..." notation (in accordance with SQL-92 standard); .

Overrides:

getStandardStatement in class JDBCQueryExpression

Parameters:

lock - whether to lock selected tables

oj - true in the first case above, false in the second case.

isLimitClauseSupported

public boolean isLimitClauseSupported()

Provides an implementation of QueryExpression#isLimitClauseSupported().

Specified by:

isLimitClauseSupported in interface QueryExpression

Overrides:

isLimitClauseSupported in class JDBCQueryExpression

Returns:

true to indicate that this feature is supported by mySQL.

See Also:

QueryExpression.isLimitClauseSupported()

isOffsetClauseSupported

public boolean isOffsetClauseSupported()

Provides an implementation of QueryExpression#isOffsetClauseSupported().

Specified by:

isOffsetClauseSupported in interface QueryExpression

Overrides:

isOffsetClauseSupported in class JDBCQueryExpression

Returns:

true to indicate that this feature is supported by mySQL.

See Also:

QueryExpression.isOffsetClauseSupported()