org.jpox.store.expression
Class TableExprAsSubquery

java.lang.Object
  org.jpox.store.expression.LogicSetExpression
      org.jpox.store.expression.TableExprAsSubquery

public class TableExprAsSubquery
extends LogicSetExpression

A SQL table expression that joins superclass tables by constructing a parenthesized sub-SELECT statement.

Version:

$Revision: 1.17 $

See Also:

QueryExpression

Field Summary

protected java.util.ArrayList	columns
protected boolean	multipleTablesReferenced

Fields inherited from class org.jpox.store.expression.LogicSetExpression

embeddedFieldMappings, LOCALISER, mainRangeVar, mainTable, qs, sqlText, storeMgr

Constructor Summary

TableExprAsSubquery(QueryExpression qs, DatastoreContainerObject mainTable, DatastoreIdentifier mainRangeVar)

Method Summary

java.lang.String	referenceColumn(DatastoreField col) Return an identifier/reference to the datastore field/column.
java.lang.String	toString()

Methods inherited from class org.jpox.store.expression.LogicSetExpression

assertNotFrozen, equals, getMainTable, getRangeVariable, hashCode, newFieldExpression

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Field Detail

columns

protected final java.util.ArrayList columns

multipleTablesReferenced

protected boolean multipleTablesReferenced

Constructor Detail

TableExprAsSubquery

public TableExprAsSubquery(QueryExpression qs,
                           DatastoreContainerObject mainTable,
                           DatastoreIdentifier mainRangeVar)

Parameters:

qs - the QueryExpression

mainTable - the main table in the query

mainRangeVar - The alias/identifier of the table in the query

Method Detail

referenceColumn

public java.lang.String referenceColumn(DatastoreField col)

Description copied from class: LogicSetExpression

Return an identifier/reference to the datastore field/column.

Specified by:

referenceColumn in class LogicSetExpression

Parameters:

col - the column to have a reference

Returns:

identifier or fully qualified identifier

toString

public java.lang.String toString()

Specified by:

toString in class LogicSetExpression