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| author | Peter Eisentraut <peter@eisentraut.org> | 2024-01-19 15:41:44 +0100 |
|---|---|---|
| committer | Peter Eisentraut <peter@eisentraut.org> | 2024-01-19 15:42:13 +0100 |
| commit | 6db4598fcb82a87a683c4572707e522504830a2b (patch) | |
| tree | 0a1b90ad4c3919e95cc72ba9a6754c6e39a8ef9d /contrib/btree_gist/btree_gist.c | |
| parent | b725b7eec431f7394d63abe621170efe3fcdcda4 (diff) | |
| download | postgresql-6db4598fcb82a87a683c4572707e522504830a2b.tar.gz postgresql-6db4598fcb82a87a683c4572707e522504830a2b.zip | |
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.
Author: Paul A. Jungwirth <pj@illuminatedcomputing.com>
Reviewed-by: Peter Eisentraut <peter@eisentraut.org>
Reviewed-by: jian he <jian.universality@gmail.com>
Discussion: https://www.postgresql.org/message-id/flat/CA+renyUApHgSZF9-nd-a0+OPGharLQLO=mDHcY4_qQ0+noCUVg@mail.gmail.com
Diffstat (limited to 'contrib/btree_gist/btree_gist.c')
| -rw-r--r-- | contrib/btree_gist/btree_gist.c | 27 |
1 files changed, 27 insertions, 0 deletions
diff --git a/contrib/btree_gist/btree_gist.c b/contrib/btree_gist/btree_gist.c index 92520aedae1..c4fc094c652 100644 --- a/contrib/btree_gist/btree_gist.c +++ b/contrib/btree_gist/btree_gist.c @@ -3,6 +3,7 @@ */ #include "postgres.h" +#include "access/stratnum.h" #include "utils/builtins.h" PG_MODULE_MAGIC; @@ -10,6 +11,7 @@ PG_MODULE_MAGIC; PG_FUNCTION_INFO_V1(gbt_decompress); PG_FUNCTION_INFO_V1(gbtreekey_in); PG_FUNCTION_INFO_V1(gbtreekey_out); +PG_FUNCTION_INFO_V1(gist_stratnum_btree); /************************************************** * In/Out for keys @@ -51,3 +53,28 @@ gbt_decompress(PG_FUNCTION_ARGS) { PG_RETURN_POINTER(PG_GETARG_POINTER(0)); } + +/* + * Returns the btree number for equals, otherwise invalid. + */ +Datum +gist_stratnum_btree(PG_FUNCTION_ARGS) +{ + StrategyNumber strat = PG_GETARG_UINT16(0); + + switch (strat) + { + case RTEqualStrategyNumber: + PG_RETURN_UINT16(BTEqualStrategyNumber); + case RTLessStrategyNumber: + PG_RETURN_UINT16(BTLessStrategyNumber); + case RTLessEqualStrategyNumber: + PG_RETURN_UINT16(BTLessEqualStrategyNumber); + case RTGreaterStrategyNumber: + PG_RETURN_UINT16(BTGreaterStrategyNumber); + case RTGreaterEqualStrategyNumber: + PG_RETURN_UINT16(BTGreaterEqualStrategyNumber); + default: + PG_RETURN_UINT16(InvalidStrategy); + } +} |