Added verbose debug output to the SUbqueryExpression
debug output correction
Added EXISTS to the explain subquery string
Introduced SubqueryExpression.SUBQUERY_TAG to replace hardcoding in two places
compilation error fix
Allow IN?EXISTS test cases
Avoid isOrderDeterministicInSpiteOfUnorderedSubqueries call for DML
IN expression support
IN expression support
Subquery with set ops support
Subquery cache results
Copy only params that have changed since the last invocation
Copy only params that have changed since the last invocation
NULL tuples work in progress
TRUE/FALSE/NULL comparisons for IN subquery
 ste vector expression type to VOLTTYPE for IN expressions
Make subquery expression aware whether it's IN or EXISTS expression to use three way (T/F/N) or two way (T/F) comparison
EXISTS simplification
GROUP BY needs to staty
Eliminate unnecessary call to parseHavingExpression