diff options
Diffstat (limited to 'src/backend/access/table/table.c')
| -rw-r--r-- | src/backend/access/table/table.c | 34 |
1 files changed, 34 insertions, 0 deletions
diff --git a/src/backend/access/table/table.c b/src/backend/access/table/table.c index 1aa01a54b34..7c29091e6c1 100644 --- a/src/backend/access/table/table.c +++ b/src/backend/access/table/table.c @@ -57,6 +57,40 @@ table_open(Oid relationId, LOCKMODE lockmode) return r; } + +/* ---------------- + * try_table_open - open a table relation by relation OID + * + * Same as table_open, except return NULL instead of failing + * if the relation does not exist. + * ---------------- + */ +Relation +try_table_open(Oid relationId, LOCKMODE lockmode) +{ + Relation r; + + r = try_relation_open(relationId, lockmode); + + /* leave if table does not exist */ + if (!r) + return NULL; + + if (r->rd_rel->relkind == RELKIND_INDEX || + r->rd_rel->relkind == RELKIND_PARTITIONED_INDEX) + ereport(ERROR, + (errcode(ERRCODE_WRONG_OBJECT_TYPE), + errmsg("\"%s\" is an index", + RelationGetRelationName(r)))); + else if (r->rd_rel->relkind == RELKIND_COMPOSITE_TYPE) + ereport(ERROR, + (errcode(ERRCODE_WRONG_OBJECT_TYPE), + errmsg("\"%s\" is a composite type", + RelationGetRelationName(r)))); + + return r; +} + /* ---------------- * table_openrv - open a table relation specified * by a RangeVar node |