public TupleValueExpression getOutputExpression ( int index ) { SchemaColumn schemaCol = getSchemaColumn ( index ) ; TupleValueExpression tve = new TupleValueExpression ( getTableAlias ( ) , getTableAlias ( ) , schemaCol . getColumnAlias ( ) , schemaCol . getColumnAlias ( ) , index ) ; return tve ; }
Produce a tuple value expression for a column produced by this subquery