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Commit31f9d41

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Fix updates of indisvalid for partitioned indexes
indisvalid is switched to true for partitioned indexes when all itspartitions have valid indexes when attaching a new partition, up to thetop-most parent if all its leaves are themselves valid when dealing withmultiple layers of partitions.The copy of the tuple from pg_index used to switch indisvalid to truecame from the relation cache, which is incorrect. Particularly, in thecase reported by Shruthi Gowda, executing a series of commands in asingle transaction would cause the validation of partitioned indexes touse an incorrect version of a pg_index tuple, as indexes are reloadedafter an invalidation request with RelationReloadIndexInfo(), a muchfaster version than a full index cache rebuild. In this case, thelimited information updated in the cache leads to an incorrect versionof the tuple used. One of the symptoms reported was the followingerror, with a replica identity update, for instance:"ERROR: attempted to update invisible tuple"This is incorrect since8b08f7d, so backpatch all the way down.Reported-by: Shruthi GowdaAuthor: Michael PaquierReviewed-by: Shruthi Gowda, Dilip KumarDiscussion:https://postgr.es/m/CAASxf_PBcxax0wW-3gErUyftZ0XrCs3Lrpuhq4-Z3Fak1DoW7Q@mail.gmail.comBackpatch-through: 11
1 parenta4b4cc1 commit31f9d41

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3 files changed

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3 files changed

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‎src/backend/commands/tablecmds.c

Lines changed: 11 additions & 4 deletions
Original file line numberDiff line numberDiff line change
@@ -19174,17 +19174,24 @@ validatePartitionedIndex(Relation partedIdx, Relation partedTbl)
1917419174
if (tuples == RelationGetPartitionDesc(partedTbl, true)->nparts)
1917519175
{
1917619176
RelationidxRel;
19177-
HeapTuplenewtup;
19177+
HeapTupleindTup;
19178+
Form_pg_index indexForm;
1917819179

1917919180
idxRel = table_open(IndexRelationId, RowExclusiveLock);
19181+
indTup = SearchSysCacheCopy1(INDEXRELID,
19182+
ObjectIdGetDatum(RelationGetRelid(partedIdx)));
19183+
if (!HeapTupleIsValid(indTup))
19184+
elog(ERROR, "cache lookup failed for index %u",
19185+
RelationGetRelid(partedIdx));
19186+
indexForm = (Form_pg_index) GETSTRUCT(indTup);
1918019187

19181-
newtup = heap_copytuple(partedIdx->rd_indextuple);
19182-
((Form_pg_index) GETSTRUCT(newtup))->indisvalid = true;
19188+
indexForm->indisvalid = true;
1918319189
updated = true;
1918419190

19185-
CatalogTupleUpdate(idxRel, &partedIdx->rd_indextuple->t_self,newtup);
19191+
CatalogTupleUpdate(idxRel, &indTup->t_self,indTup);
1918619192

1918719193
table_close(idxRel, RowExclusiveLock);
19194+
heap_freetuple(indTup);
1918819195
}
1918919196

1919019197
/*

‎src/test/regress/expected/indexing.out

Lines changed: 63 additions & 0 deletions
Original file line numberDiff line numberDiff line change
@@ -1486,3 +1486,66 @@ select indexrelid::regclass, indisvalid,
14861486
(5 rows)
14871487

14881488
drop table parted_isvalid_tab;
1489+
-- Check state of replica indexes when attaching a partition.
1490+
begin;
1491+
create table parted_replica_tab (id int not null) partition by range (id);
1492+
create table parted_replica_tab_1 partition of parted_replica_tab
1493+
for values from (1) to (10) partition by range (id);
1494+
create table parted_replica_tab_11 partition of parted_replica_tab_1
1495+
for values from (1) to (5);
1496+
create unique index parted_replica_idx
1497+
on only parted_replica_tab using btree (id);
1498+
create unique index parted_replica_idx_1
1499+
on only parted_replica_tab_1 using btree (id);
1500+
-- This triggers an update of pg_index.indisreplident for parted_replica_idx.
1501+
alter table only parted_replica_tab_1 replica identity
1502+
using index parted_replica_idx_1;
1503+
create unique index parted_replica_idx_11 on parted_replica_tab_11 USING btree (id);
1504+
select indexrelid::regclass, indisvalid, indisreplident,
1505+
indrelid::regclass, inhparent::regclass
1506+
from pg_index idx left join
1507+
pg_inherits inh on (idx.indexrelid = inh.inhrelid)
1508+
where indexrelid::regclass::text like 'parted_replica%'
1509+
order by indexrelid::regclass::text collate "C";
1510+
indexrelid | indisvalid | indisreplident | indrelid | inhparent
1511+
-----------------------+------------+----------------+-----------------------+-----------
1512+
parted_replica_idx | f | f | parted_replica_tab |
1513+
parted_replica_idx_1 | f | t | parted_replica_tab_1 |
1514+
parted_replica_idx_11 | t | f | parted_replica_tab_11 |
1515+
(3 rows)
1516+
1517+
-- parted_replica_idx is not valid yet here, because parted_replica_idx_1
1518+
-- is not valid.
1519+
alter index parted_replica_idx ATTACH PARTITION parted_replica_idx_1;
1520+
select indexrelid::regclass, indisvalid, indisreplident,
1521+
indrelid::regclass, inhparent::regclass
1522+
from pg_index idx left join
1523+
pg_inherits inh on (idx.indexrelid = inh.inhrelid)
1524+
where indexrelid::regclass::text like 'parted_replica%'
1525+
order by indexrelid::regclass::text collate "C";
1526+
indexrelid | indisvalid | indisreplident | indrelid | inhparent
1527+
-----------------------+------------+----------------+-----------------------+--------------------
1528+
parted_replica_idx | f | f | parted_replica_tab |
1529+
parted_replica_idx_1 | f | t | parted_replica_tab_1 | parted_replica_idx
1530+
parted_replica_idx_11 | t | f | parted_replica_tab_11 |
1531+
(3 rows)
1532+
1533+
-- parted_replica_idx becomes valid here.
1534+
alter index parted_replica_idx_1 ATTACH PARTITION parted_replica_idx_11;
1535+
alter table only parted_replica_tab_1 replica identity
1536+
using index parted_replica_idx_1;
1537+
commit;
1538+
select indexrelid::regclass, indisvalid, indisreplident,
1539+
indrelid::regclass, inhparent::regclass
1540+
from pg_index idx left join
1541+
pg_inherits inh on (idx.indexrelid = inh.inhrelid)
1542+
where indexrelid::regclass::text like 'parted_replica%'
1543+
order by indexrelid::regclass::text collate "C";
1544+
indexrelid | indisvalid | indisreplident | indrelid | inhparent
1545+
-----------------------+------------+----------------+-----------------------+----------------------
1546+
parted_replica_idx | t | f | parted_replica_tab |
1547+
parted_replica_idx_1 | t | t | parted_replica_tab_1 | parted_replica_idx
1548+
parted_replica_idx_11 | t | f | parted_replica_tab_11 | parted_replica_idx_1
1549+
(3 rows)
1550+
1551+
drop table parted_replica_tab;

‎src/test/regress/sql/indexing.sql

Lines changed: 43 additions & 0 deletions
Original file line numberDiff line numberDiff line change
@@ -808,3 +808,46 @@ select indexrelid::regclass, indisvalid,
808808
where indexrelid::regclass::textlike'parted_isvalid%'
809809
order by indexrelid::regclass::text collate"C";
810810
droptable parted_isvalid_tab;
811+
812+
-- Check state of replica indexes when attaching a partition.
813+
begin;
814+
createtableparted_replica_tab (idintnot null) partition by range (id);
815+
createtableparted_replica_tab_1 partition of parted_replica_tab
816+
forvaluesfrom (1) to (10) partition by range (id);
817+
createtableparted_replica_tab_11 partition of parted_replica_tab_1
818+
forvaluesfrom (1) to (5);
819+
createunique indexparted_replica_idx
820+
on only parted_replica_tab using btree (id);
821+
createunique indexparted_replica_idx_1
822+
on only parted_replica_tab_1 using btree (id);
823+
-- This triggers an update of pg_index.indisreplident for parted_replica_idx.
824+
altertable only parted_replica_tab_1 replica identity
825+
using index parted_replica_idx_1;
826+
createunique indexparted_replica_idx_11on parted_replica_tab_11 USING btree (id);
827+
select indexrelid::regclass, indisvalid, indisreplident,
828+
indrelid::regclass, inhparent::regclass
829+
from pg_index idxleft join
830+
pg_inherits inhon (idx.indexrelid=inh.inhrelid)
831+
where indexrelid::regclass::textlike'parted_replica%'
832+
order by indexrelid::regclass::text collate"C";
833+
-- parted_replica_idx is not valid yet here, because parted_replica_idx_1
834+
-- is not valid.
835+
alterindex parted_replica_idx ATTACH PARTITION parted_replica_idx_1;
836+
select indexrelid::regclass, indisvalid, indisreplident,
837+
indrelid::regclass, inhparent::regclass
838+
from pg_index idxleft join
839+
pg_inherits inhon (idx.indexrelid=inh.inhrelid)
840+
where indexrelid::regclass::textlike'parted_replica%'
841+
order by indexrelid::regclass::text collate"C";
842+
-- parted_replica_idx becomes valid here.
843+
alterindex parted_replica_idx_1 ATTACH PARTITION parted_replica_idx_11;
844+
altertable only parted_replica_tab_1 replica identity
845+
using index parted_replica_idx_1;
846+
commit;
847+
select indexrelid::regclass, indisvalid, indisreplident,
848+
indrelid::regclass, inhparent::regclass
849+
from pg_index idxleft join
850+
pg_inherits inhon (idx.indexrelid=inh.inhrelid)
851+
where indexrelid::regclass::textlike'parted_replica%'
852+
order by indexrelid::regclass::text collate"C";
853+
droptable parted_replica_tab;

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