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Re-allow SRFs and window functions within sub-selects within aggregates.

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check_agg_arguments_walker threw an error upon seeing a SRF or window
function, but that is too aggressive: if the function is within a
sub-select then it's perfectly fine.  I broke the SRF case in commit
0436f6bde by copying the logic for window functions ... but that was
broken too, and had been since commit eaccfded9.

Repair both cases in HEAD, and the window function case back to 9.3.
9.2 gets this right.
This commit is contained in:
Tom Lane
2017-06-27 17:51:11 -04:00
parent df31a9fc66
commit 3a7bd59c44
1 changed files with 1 additions and 1 deletions
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2
src/backend/parser/parse_agg.c
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@ -700,7 +700,7 @@ check_agg_arguments_walker(Node *node,
/* Continue and descend into subtree */
}
/* We can throw error on sight for a window function */
if (IsA(node, WindowFunc))
if (IsA(node, WindowFunc) && context->sublevels_up == 0)
ereport(ERROR,
(errcode(ERRCODE_GROUPING_ERROR),
errmsg("aggregate function calls cannot contain window function calls"),