com.triactive.jdo.store.sql.expr
Class TableExpression

java.lang.Object
  com.triactive.jdo.store.sql.expr.TableExpression

Direct Known Subclasses:

TableExprAsJoins, TableExprAsSubjoins, TableExprAsSubquery

public abstract class TableExpression

extends java.lang.Object

Represents a SQL table expression as might be listed in the FROM clause of a SELECT statement. A table expression is a fragment of a larger containing QueryStatement.

A table expression has a base "main" table. If that table serves as backing for a Java class, and that class has persistence-capable superclasses, then the table expression may include joins to superclass tables, or may cause such joins to occur in its surrounding QueryStatement.

Author:

Mike Martin

See Also:

QueryStatement

Field Summary

protected CorrelationName	mainRangeVar
protected Table	mainTable
protected java.util.Set	outerJoinedOn
protected QueryStatement	qs
protected java.lang.String	sqlText

Constructor Summary

protected

TableExpression(QueryStatement qs, Table mainTable, CorrelationName mainRangeVar)

Method Summary

protected void	assertNotFrozen()
QueryStatement.QueryColumn	getColumn(Column col)
QueryStatement.QueryColumn[]	getColumns(Column[] cols)
QueryStatement	getQueryStatement()
boolean	isOuterJoined()
CorrelationName	mainRangeVariable()
Table	mainTable()
java.util.Set	outerJoinedOn()
abstract java.lang.String	toString()

Methods inherited from class java.lang.Object

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

Field Detail

qs

protected final QueryStatement qs

mainTable

protected final Table mainTable

mainRangeVar

protected final CorrelationName mainRangeVar

sqlText

protected java.lang.String sqlText

outerJoinedOn

protected java.util.Set outerJoinedOn

Constructor Detail

TableExpression

protected TableExpression(QueryStatement qs,
                          Table mainTable,
                          CorrelationName mainRangeVar)

Method Detail

assertNotFrozen

protected void assertNotFrozen()

getQueryStatement

public final QueryStatement getQueryStatement()

mainTable

public final Table mainTable()

mainRangeVariable

public final CorrelationName mainRangeVariable()

getColumn

public QueryStatement.QueryColumn getColumn(Column col)

getColumns

public QueryStatement.QueryColumn[] getColumns(Column[] cols)

isOuterJoined

public boolean isOuterJoined()

outerJoinedOn

public java.util.Set outerJoinedOn()

toString

public abstract java.lang.String toString()