diff options
Diffstat (limited to '')
| -rw-r--r-- | src/backend/access/index/indexam.c | 49 |
1 files changed, 43 insertions, 6 deletions
diff --git a/src/backend/access/index/indexam.c b/src/backend/access/index/indexam.c index fe80b8b..cd5f07f 100644 --- a/src/backend/access/index/indexam.c +++ b/src/backend/access/index/indexam.c @@ -107,6 +107,7 @@ do { \ static IndexScanDesc index_beginscan_internal(Relation indexRelation, int nkeys, int norderbys, Snapshot snapshot, ParallelIndexScanDesc pscan, bool temp_snap); +static inline void validate_relation_kind(Relation r); /* ---------------------------------------------------------------- @@ -135,12 +136,30 @@ index_open(Oid relationId, LOCKMODE lockmode) r = relation_open(relationId, lockmode); - if (r->rd_rel->relkind != RELKIND_INDEX && - r->rd_rel->relkind != RELKIND_PARTITIONED_INDEX) - ereport(ERROR, - (errcode(ERRCODE_WRONG_OBJECT_TYPE), - errmsg("\"%s\" is not an index", - RelationGetRelationName(r)))); + validate_relation_kind(r); + + return r; +} + +/* ---------------- + * try_index_open - open a index relation by relation OID + * + * Same as index_open, except return NULL instead of failing + * if the relation does not exist. + * ---------------- + */ +Relation +try_index_open(Oid relationId, LOCKMODE lockmode) +{ + Relation r; + + r = try_relation_open(relationId, lockmode); + + /* leave if index does not exist */ + if (!r) + return NULL; + + validate_relation_kind(r); return r; } @@ -169,6 +188,24 @@ index_close(Relation relation, LOCKMODE lockmode) } /* ---------------- + * validate_relation_kind - check the relation's kind + * + * Make sure relkind is an index or a partitioned index. + * ---------------- + */ +static inline void +validate_relation_kind(Relation r) +{ + if (r->rd_rel->relkind != RELKIND_INDEX && + r->rd_rel->relkind != RELKIND_PARTITIONED_INDEX) + ereport(ERROR, + (errcode(ERRCODE_WRONG_OBJECT_TYPE), + errmsg("\"%s\" is not an index", + RelationGetRelationName(r)))); +} + + +/* ---------------- * index_insert - insert an index tuple into a relation * ---------------- */ |