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Diffstat (limited to 'src/backend/utils/cache/lsyscache.c')
| -rw-r--r-- | src/backend/utils/cache/lsyscache.c | 35 |
1 files changed, 35 insertions, 0 deletions
diff --git a/src/backend/utils/cache/lsyscache.c b/src/backend/utils/cache/lsyscache.c index 27bbb58f564..0a6db0d478e 100644 --- a/src/backend/utils/cache/lsyscache.c +++ b/src/backend/utils/cache/lsyscache.c @@ -909,6 +909,41 @@ get_atttypetypmodcoll(Oid relid, AttrNumber attnum, ReleaseSysCache(tp); } +/* + * get_attoptions + * + * Given the relation id and the attribute number, + * return the attribute options text[] datum, if any. + */ +Datum +get_attoptions(Oid relid, int16 attnum) +{ + HeapTuple tuple; + Datum attopts; + Datum result; + bool isnull; + + tuple = SearchSysCache2(ATTNUM, + ObjectIdGetDatum(relid), + Int16GetDatum(attnum)); + + if (!HeapTupleIsValid(tuple)) + elog(ERROR, "cache lookup failed for attribute %d of relation %u", + attnum, relid); + + attopts = SysCacheGetAttr(ATTNAME, tuple, Anum_pg_attribute_attoptions, + &isnull); + + if (isnull) + result = (Datum) 0; + else + result = datumCopy(attopts, false, -1); /* text[] */ + + ReleaseSysCache(tuple); + + return result; +} + /* ---------- PG_CAST CACHE ---------- */ /* |