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Diffstat (limited to 'src/backend/optimizer/util/var.c')
| -rw-r--r-- | src/backend/optimizer/util/var.c | 24 |
1 files changed, 24 insertions, 0 deletions
diff --git a/src/backend/optimizer/util/var.c b/src/backend/optimizer/util/var.c index 8f864323611..0f25539d124 100644 --- a/src/backend/optimizer/util/var.c +++ b/src/backend/optimizer/util/var.c @@ -564,6 +564,30 @@ pull_var_clause_walker(Node *node, pull_var_clause_context *context) break; } } + else if (IsA(node, GroupingFunc)) + { + if (((GroupingFunc *) node)->agglevelsup != 0) + elog(ERROR, "Upper-level GROUPING found where not expected"); + switch (context->aggbehavior) + { + case PVC_REJECT_AGGREGATES: + elog(ERROR, "GROUPING found where not expected"); + break; + case PVC_INCLUDE_AGGREGATES: + context->varlist = lappend(context->varlist, node); + /* we do NOT descend into the contained expression */ + return false; + case PVC_RECURSE_AGGREGATES: + /* + * we do NOT descend into the contained expression, + * even if the caller asked for it, because we never + * actually evaluate it - the result is driven entirely + * off the associated GROUP BY clause, so we never need + * to extract the actual Vars here. + */ + return false; + } + } else if (IsA(node, PlaceHolderVar)) { if (((PlaceHolderVar *) node)->phlevelsup != 0) |