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Commit123b0d1

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Diagnose !indisvalid in more SQL functions.
pgstatindex failed with ERRCODE_DATA_CORRUPTED, of the "can't-happen"class XX. The other functions succeeded on an empty index; they mighthave malfunctioned if the failed index build left torn I/O or othercomplex state. Report an ERROR in statistics functions pgstatindex,pgstatginindex, pgstathashindex, and pgstattuple. Report DEBUG1 andskip all index I/O in maintenance functions brin_desummarize_range,brin_summarize_new_values, brin_summarize_range, andgin_clean_pending_list. Back-patch to v11 (all supported versions).Discussion:https://postgr.es/m/20231001195309.a3@google.com
1 parentf31ccb5 commit123b0d1

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4 files changed

+74
-9
lines changed

4 files changed

+74
-9
lines changed

‎contrib/pgstattuple/pgstatindex.c

Lines changed: 26 additions & 0 deletions
Original file line numberDiff line numberDiff line change
@@ -237,6 +237,18 @@ pgstatindex_impl(Relation rel, FunctionCallInfo fcinfo)
237237
(errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
238238
errmsg("cannot access temporary tables of other sessions")));
239239

240+
/*
241+
* A !indisready index could lead to ERRCODE_DATA_CORRUPTED later, so exit
242+
* early. We're capable of assessing an indisready&&!indisvalid index,
243+
* but the results could be confusing. For example, the index's size
244+
* could be too low for a valid index of the table.
245+
*/
246+
if (!rel->rd_index->indisvalid)
247+
ereport(ERROR,
248+
(errcode(ERRCODE_OBJECT_NOT_IN_PREREQUISITE_STATE),
249+
errmsg("index \"%s\" is not valid",
250+
RelationGetRelationName(rel))));
251+
240252
/*
241253
* Read metapage
242254
*/
@@ -538,6 +550,13 @@ pgstatginindex_internal(Oid relid, FunctionCallInfo fcinfo)
538550
(errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
539551
errmsg("cannot access temporary indexes of other sessions")));
540552

553+
/* see pgstatindex_impl */
554+
if (!rel->rd_index->indisvalid)
555+
ereport(ERROR,
556+
(errcode(ERRCODE_OBJECT_NOT_IN_PREREQUISITE_STATE),
557+
errmsg("index \"%s\" is not valid",
558+
RelationGetRelationName(rel))));
559+
541560
/*
542561
* Read metapage
543562
*/
@@ -615,6 +634,13 @@ pgstathashindex(PG_FUNCTION_ARGS)
615634
(errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
616635
errmsg("cannot access temporary indexes of other sessions")));
617636

637+
/* see pgstatindex_impl */
638+
if (!rel->rd_index->indisvalid)
639+
ereport(ERROR,
640+
(errcode(ERRCODE_OBJECT_NOT_IN_PREREQUISITE_STATE),
641+
errmsg("index \"%s\" is not valid",
642+
RelationGetRelationName(rel))));
643+
618644
/* Get the information we need from the metapage. */
619645
memset(&stats,0,sizeof(stats));
620646
metabuf=_hash_getbuf(rel,HASH_METAPAGE,HASH_READ,LH_META_PAGE);

‎contrib/pgstattuple/pgstattuple.c

Lines changed: 7 additions & 0 deletions
Original file line numberDiff line numberDiff line change
@@ -260,6 +260,13 @@ pgstat_relation(Relation rel, FunctionCallInfo fcinfo)
260260
caseRELKIND_SEQUENCE:
261261
returnpgstat_heap(rel,fcinfo);
262262
caseRELKIND_INDEX:
263+
/* see pgstatindex_impl */
264+
if (!rel->rd_index->indisvalid)
265+
ereport(ERROR,
266+
(errcode(ERRCODE_OBJECT_NOT_IN_PREREQUISITE_STATE),
267+
errmsg("index \"%s\" is not valid",
268+
RelationGetRelationName(rel))));
269+
263270
switch (rel->rd_rel->relam)
264271
{
265272
caseBTREE_AM_OID:

‎src/backend/access/brin/brin.c

Lines changed: 21 additions & 6 deletions
Original file line numberDiff line numberDiff line change
@@ -1031,8 +1031,14 @@ brin_summarize_range(PG_FUNCTION_ARGS)
10311031
errmsg("could not open parent table of index %s",
10321032
RelationGetRelationName(indexRel))));
10331033

1034-
/* OK, do it */
1035-
brinsummarize(indexRel,heapRel,heapBlk, true,&numSummarized,NULL);
1034+
/* see gin_clean_pending_list() */
1035+
if (indexRel->rd_index->indisvalid)
1036+
brinsummarize(indexRel,heapRel,heapBlk, true,&numSummarized,NULL);
1037+
else
1038+
ereport(DEBUG1,
1039+
(errcode(ERRCODE_OBJECT_NOT_IN_PREREQUISITE_STATE),
1040+
errmsg("index \"%s\" is not valid",
1041+
RelationGetRelationName(indexRel))));
10361042

10371043
/* Roll back any GUC changes executed by index functions */
10381044
AtEOXact_GUC(false,save_nestlevel);
@@ -1117,12 +1123,21 @@ brin_desummarize_range(PG_FUNCTION_ARGS)
11171123
errmsg("could not open parent table of index %s",
11181124
RelationGetRelationName(indexRel))));
11191125

1120-
/*the revmap does the hard work */
1121-
do
1126+
/*see gin_clean_pending_list() */
1127+
if (indexRel->rd_index->indisvalid)
11221128
{
1123-
done=brinRevmapDesummarizeRange(indexRel,heapBlk);
1129+
/* the revmap does the hard work */
1130+
do
1131+
{
1132+
done=brinRevmapDesummarizeRange(indexRel,heapBlk);
1133+
}
1134+
while (!done);
11241135
}
1125-
while (!done);
1136+
else
1137+
ereport(DEBUG1,
1138+
(errcode(ERRCODE_OBJECT_NOT_IN_PREREQUISITE_STATE),
1139+
errmsg("index \"%s\" is not valid",
1140+
RelationGetRelationName(indexRel))));
11261141

11271142
relation_close(indexRel,ShareUpdateExclusiveLock);
11281143
relation_close(heapRel,ShareUpdateExclusiveLock);

‎src/backend/access/gin/ginfast.c

Lines changed: 20 additions & 3 deletions
Original file line numberDiff line numberDiff line change
@@ -1035,7 +1035,6 @@ gin_clean_pending_list(PG_FUNCTION_ARGS)
10351035
Oidindexoid=PG_GETARG_OID(0);
10361036
RelationindexRel=index_open(indexoid,RowExclusiveLock);
10371037
IndexBulkDeleteResultstats;
1038-
GinStateginstate;
10391038

10401039
if (RecoveryInProgress())
10411040
ereport(ERROR,
@@ -1067,8 +1066,26 @@ gin_clean_pending_list(PG_FUNCTION_ARGS)
10671066
RelationGetRelationName(indexRel));
10681067

10691068
memset(&stats,0,sizeof(stats));
1070-
initGinState(&ginstate,indexRel);
1071-
ginInsertCleanup(&ginstate, true, true, true,&stats);
1069+
1070+
/*
1071+
* Can't assume anything about the content of an !indisready index. Make
1072+
* those a no-op, not an error, so users can just run this function on all
1073+
* indexes of the access method. Since an indisready&&!indisvalid index
1074+
* is merely awaiting missed aminsert calls, we're capable of processing
1075+
* it. Decline to do so, out of an abundance of caution.
1076+
*/
1077+
if (indexRel->rd_index->indisvalid)
1078+
{
1079+
GinStateginstate;
1080+
1081+
initGinState(&ginstate,indexRel);
1082+
ginInsertCleanup(&ginstate, true, true, true,&stats);
1083+
}
1084+
else
1085+
ereport(DEBUG1,
1086+
(errcode(ERRCODE_OBJECT_NOT_IN_PREREQUISITE_STATE),
1087+
errmsg("index \"%s\" is not valid",
1088+
RelationGetRelationName(indexRel))));
10721089

10731090
index_close(indexRel,RowExclusiveLock);
10741091

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