diff options
| author | Peter Eisentraut | 2024-09-17 08:19:26 +0000 |
|---|---|---|
| committer | Peter Eisentraut | 2024-09-17 09:29:29 +0000 |
| commit | 7406ab623fee1addcb21c881afecbe638a0d56e9 (patch) | |
| tree | 6c75a0f795ecec184e0cb9dcd05ed74bd324a6c6 /src/backend/access/gist/gistutil.c | |
| parent | 95d6e9af07d2e5af2fdd272e72b5b552bad3ea0a (diff) | |
Add stratnum GiST support function
This is support function 12 for the GiST AM and translates
"well-known" RT*StrategyNumber values into whatever strategy number is
used by the opclass (since no particular numbers are actually
required). We will use this to support temporal PRIMARY
KEY/UNIQUE/FOREIGN KEY/FOR PORTION OF functionality.
This commit adds two implementations, one for internal GiST opclasses
(just an identity function) and another for btree_gist opclasses. It
updates btree_gist from 1.7 to 1.8, adding the support function for
all its opclasses.
(previously committed as 6db4598fcb8, reverted by 8aee330af55; this is
essentially unchanged from those)
Author: Paul A. Jungwirth <[email protected]>
Reviewed-by: Peter Eisentraut <[email protected]>
Reviewed-by: jian he <[email protected]>
Discussion: https://www.postgresql.org/message-id/flat/CA+renyUApHgSZF9-nd-a0+OPGharLQLO=mDHcY4_qQ0+noCUVg@mail.gmail.com
Diffstat (limited to 'src/backend/access/gist/gistutil.c')
| -rw-r--r-- | src/backend/access/gist/gistutil.c | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/src/backend/access/gist/gistutil.c b/src/backend/access/gist/gistutil.c index 78e98d68b15..8686735f234 100644 --- a/src/backend/access/gist/gistutil.c +++ b/src/backend/access/gist/gistutil.c @@ -21,6 +21,7 @@ #include "common/pg_prng.h" #include "storage/indexfsm.h" #include "utils/float.h" +#include "utils/fmgrprotos.h" #include "utils/lsyscache.h" #include "utils/rel.h" #include "utils/snapmgr.h" @@ -1055,3 +1056,16 @@ gistGetFakeLSN(Relation rel) return GetFakeLSNForUnloggedRel(); } } + +/* + * Returns the same number that was received. + * + * This is for GiST opclasses that use the RT*StrategyNumber constants. + */ +Datum +gist_stratnum_identity(PG_FUNCTION_ARGS) +{ + StrategyNumber strat = PG_GETARG_UINT16(0); + + PG_RETURN_UINT16(strat); +} |