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: 1.10 $ $Date: 2005/07/05 13:25:41 $
- Author:
- Oleg Nitz
Fields inherited from class org.exolab.castor.jdo.drivers.JDBCQueryExpression |
_cols, _conds, _dbInfo, _distinct, _factory, _joins, _limit, _offset, _order, _select, _tables, _where |
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 |
HsqlQueryExpression
public HsqlQueryExpression(PersistenceFactory factory)
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 .
- Specified by:
getStatement
in interface QueryExpression
- Overrides:
getStatement
in class JDBCQueryExpression
- Parameters:
lock
- True if a write lock is required
- Returns:
- The SQL statement
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 tablesoj
- 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()
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