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| author | Peter Eisentraut <peter@eisentraut.org> | 2020-03-13 11:28:11 +0100 |
|---|---|---|
| committer | Peter Eisentraut <peter@eisentraut.org> | 2020-03-13 13:21:05 +0100 |
| commit | 2f0dd9d93efe0d2e41585f804a38b2db5b7f429d (patch) | |
| tree | 4da87bdee644c4354ca94476205a4b70273e4730 /src/backend/utils | |
| parent | 4e8cad2da36adff877c81d8c336d7c28ed19ebae (diff) | |
Preserve replica identity index across ALTER TABLE rewrite
If an index was explicitly set as replica identity index, this setting
was lost when a table was rewritten by ALTER TABLE. Because this
setting is part of pg_index but actually controlled by ALTER
TABLE (not part of CREATE INDEX, say), we have to do some extra work
to restore it.
Based-on-patch-by: Quan Zongliang <quanzongliang@gmail.com>
Reviewed-by: Euler Taveira <euler.taveira@2ndquadrant.com>
Discussion: https://www.postgresql.org/message-id/flat/c70fcab2-4866-0d9f-1d01-e75e189db342@gmail.com
Diffstat (limited to 'src/backend/utils')
| -rw-r--r-- | src/backend/utils/cache/lsyscache.c | 25 |
1 files changed, 25 insertions, 0 deletions
diff --git a/src/backend/utils/cache/lsyscache.c b/src/backend/utils/cache/lsyscache.c index e39c1d45cd1..5cf32e01785 100644 --- a/src/backend/utils/cache/lsyscache.c +++ b/src/backend/utils/cache/lsyscache.c @@ -3088,3 +3088,28 @@ get_range_collation(Oid rangeOid) else return InvalidOid; } + +/* ---------- PG_INDEX CACHE ---------- */ + +/* + * get_index_isreplident + * + * Given the index OID, return pg_index.indisreplident. + */ +bool +get_index_isreplident(Oid index_oid) +{ + HeapTuple tuple; + Form_pg_index rd_index; + bool result; + + tuple = SearchSysCache1(INDEXRELID, ObjectIdGetDatum(index_oid)); + if (!HeapTupleIsValid(tuple)) + return false; + + rd_index = (Form_pg_index) GETSTRUCT(tuple); + result = rd_index->indisreplident; + ReleaseSysCache(tuple); + + return result; +} |