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authorTom Lane <tgl@sss.pgh.pa.us>2022-09-20 12:04:37 -0400
committerTom Lane <tgl@sss.pgh.pa.us>2022-09-20 12:04:37 -0400
commit2e124d857a64a91d2b70afdbed6156d753089771 (patch)
treef6f303985abd59954e6050417447f4b6717f67bf /src/backend/utils/adt/array_typanalyze.c
parent382cc68007784623e365ec033468ec69535afbaf (diff)
downloadpostgresql-2e124d857a64a91d2b70afdbed6156d753089771.tar.gz
postgresql-2e124d857a64a91d2b70afdbed6156d753089771.zip
Suppress variable-set-but-not-used warnings from clang 15.
clang 15+ will issue a set-but-not-used warning when the only use of a variable is in autoincrements (e.g., "foo++;"). That's perfectly sensible, but it detects a few more cases that we'd not noticed before. Silence the warnings with our usual methods, such as PG_USED_FOR_ASSERTS_ONLY, or in one case by actually removing a useless variable. One thing that we can't nicely get rid of is that with %pure-parser, Bison emits "yynerrs" as a local variable that falls foul of this warning. To silence those, I inserted "(void) yynerrs;" in the top-level productions of affected grammars. Per recently-established project policy, this is a candidate for back-patching into out-of-support branches: it suppresses annoying compiler warnings but changes no behavior. Hence, back-patch to 9.5, which is as far as these patches go without issues. (A preliminary check shows that the prior branches need some other set-but-not-used cleanups too, so I'll leave them for another day.) Discussion: https://postgr.es/m/514615.1663615243@sss.pgh.pa.us
Diffstat (limited to 'src/backend/utils/adt/array_typanalyze.c')
-rw-r--r--src/backend/utils/adt/array_typanalyze.c4
1 files changed, 1 insertions, 3 deletions
diff --git a/src/backend/utils/adt/array_typanalyze.c b/src/backend/utils/adt/array_typanalyze.c
index e873d228592..8993d23e18b 100644
--- a/src/backend/utils/adt/array_typanalyze.c
+++ b/src/backend/utils/adt/array_typanalyze.c
@@ -218,7 +218,6 @@ compute_array_stats(VacAttrStats *stats, AnalyzeAttrFetchFunc fetchfunc,
{
ArrayAnalyzeExtraData *extra_data;
int num_mcelem;
- int null_cnt = 0;
int null_elem_cnt = 0;
int analyzed_rows = 0;
@@ -320,8 +319,7 @@ compute_array_stats(VacAttrStats *stats, AnalyzeAttrFetchFunc fetchfunc,
value = fetchfunc(stats, array_no, &isnull);
if (isnull)
{
- /* array is null, just count that */
- null_cnt++;
+ /* ignore arrays that are null overall */
continue;
}