internal static bool CanLift(SqlSource source, HashSet<SqlAlias> aliasesForLifting, HashSet<SqlExpression> liftedExpressions)
{
Diagnostics.Debug.Assert(source != null);
Diagnostics.Debug.Assert(aliasesForLifting != null);
PredicateLifter v = new PredicateLifter(false, aliasesForLifting, liftedExpressions);
v.VisitSource(source);
return v.CanLiftAll;
}
internal static SqlExpression Lift(SqlSource source, HashSet<SqlAlias> aliasesForLifting)
{
Diagnostics.Debug.Assert(source != null);
Diagnostics.Debug.Assert(aliasesForLifting != null);
PredicateLifter v = new PredicateLifter(true, aliasesForLifting, null);
v.VisitSource(source);
return v.Lifted;
}