Movatterモバイル変換

[0]ホーム
URL:

Skip to content

Navigation Menu

Sign in
Appearance settings

Search code, repositories, users, issues, pull requests...

Provide feedback

We read every piece of feedback, and take your input very seriously.

Saved searches

Use saved searches to filter your results more quickly

 Sign up
Appearance settings

Commit62a91a1

Browse files
committed
Fix failure to detect some cases of improperly-nested aggregates.
check_agg_arguments_walker() supposed that it needn't descend intothe arguments of a lower-level aggregate function, but this isjust wrong in the presence of multiple levels of sub-select. Theoversight would lead to executor failures on queries that shouldbe rejected. (Prior to v11, they actually were rejected, thanksto a "redundant" execution-time check.)Per bug #17835 from Anban Company. Back-patch to all supportedbranches.Discussion:https://postgr.es/m/17835-4f29f3098b2d0ba4@postgresql.org
1 parent2bc36a5 commit62a91a1

File tree

3 files changed

+10
-2
lines changed

3 files changed

+10
-2
lines changed

‎src/backend/parser/parse_agg.c‎

Lines changed: 1 addition & 2 deletions
Original file line numberDiff line numberDiff line change
@@ -717,8 +717,7 @@ check_agg_arguments_walker(Node *node,
717717
context->min_agglevel>agglevelsup)
718718
context->min_agglevel=agglevelsup;
719719
}
720-
/* no need to examine args of the inner aggregate */
721-
return false;
720+
/* Continue and descend into subtree */
722721
}
723722
if (IsA(node,GroupingFunc))
724723
{

‎src/test/regress/expected/aggregates.out‎

Lines changed: 6 additions & 0 deletions
Original file line numberDiff line numberDiff line change
@@ -1187,6 +1187,12 @@ select (select max(min(unique1)) from int8_tbl) from tenk1;
11871187
ERROR: aggregate function calls cannot be nested
11881188
LINE 1: select (select max(min(unique1)) from int8_tbl) from tenk1;
11891189
^
1190+
select avg((select avg(a1.col1 order by (select avg(a2.col2) from tenk1 a3))
1191+
from tenk1 a1(col1)))
1192+
from tenk1 a2(col2);
1193+
ERROR: aggregate function calls cannot be nested
1194+
LINE 1: select avg((select avg(a1.col1 order by (select avg(a2.col2)...
1195+
^
11901196
--
11911197
-- Test removal of redundant GROUP BY columns
11921198
--

‎src/test/regress/sql/aggregates.sql‎

Lines changed: 3 additions & 0 deletions
Original file line numberDiff line numberDiff line change
@@ -397,6 +397,9 @@ drop table minmaxtest cascade;
397397
-- check for correct detection of nested-aggregate errors
398398
selectmax(min(unique1))from tenk1;
399399
select (selectmax(min(unique1))from int8_tbl)from tenk1;
400+
selectavg((selectavg(a1.col1order by (selectavg(a2.col2)from tenk1 a3))
401+
from tenk1 a1(col1)))
402+
from tenk1 a2(col2);
400403

401404
--
402405
-- Test removal of redundant GROUP BY columns

0 commit comments

Comments
 (0)
[8]ページ先頭
©2009-2025 Movatter.jp