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Diffstat (limited to 'src/backend/utils/cache/lsyscache.c')
| -rw-r--r-- | src/backend/utils/cache/lsyscache.c | 26 |
1 files changed, 26 insertions, 0 deletions
diff --git a/src/backend/utils/cache/lsyscache.c b/src/backend/utils/cache/lsyscache.c index 1e3e6d3a7e7..fb0599f7f13 100644 --- a/src/backend/utils/cache/lsyscache.c +++ b/src/backend/utils/cache/lsyscache.c @@ -3150,6 +3150,32 @@ get_range_subtype(Oid rangeOid) return InvalidOid; } +/* + * get_range_collation + * Returns the collation of a given range type + * + * Returns InvalidOid if the type is not a range type, + * or if its subtype is not collatable. + */ +Oid +get_range_collation(Oid rangeOid) +{ + HeapTuple tp; + + tp = SearchSysCache1(RANGETYPE, ObjectIdGetDatum(rangeOid)); + if (HeapTupleIsValid(tp)) + { + Form_pg_range rngtup = (Form_pg_range) GETSTRUCT(tp); + Oid result; + + result = rngtup->rngcollation; + ReleaseSysCache(tp); + return result; + } + else + return InvalidOid; +} + /* ---------- PG_INDEX CACHE ---------- */ /* |