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Adjust the APIs for GIN opclass support functions to allow the extractQuery()

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method to pass extra data to the consistent() and comparePartial() methods.
This is the core infrastructure needed to support the soon-to-appear
contrib/btree_gin module.  The APIs are still upward compatible with the
definitions used in 8.3 and before, although *not* with the previous 8.4devel
function definitions.

catversion bump for changes in pg_proc entries (although these are just
cosmetic, since GIN doesn't actually look at the function signature before
calling it...)

Teodor Sigaev and Oleg Bartunov
This commit is contained in:
Tom Lane
2009-03-25 22:19:02 +00:00
parent 050a78dd3d
commit 87b8db3774
18 changed files with 210 additions and 148 deletions
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12
contrib/pg_trgm/pg_trgm.sql.in
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@@ -1,4 +1,4 @@
/* $PostgreSQL: pgsql/contrib/pg_trgm/pg_trgm.sql.in,v 1.8 2008/04/14 17:05:32 tgl Exp $ */
/* $PostgreSQL: pgsql/contrib/pg_trgm/pg_trgm.sql.in,v 1.9 2009/03/25 22:19:01 tgl Exp $ */
-- Adjust this setting to control where the objects get created.
SET search_path = public;
@@ -110,13 +110,13 @@ RETURNS internal
AS 'MODULE_PATHNAME'
LANGUAGE C IMMUTABLE;
CREATE OR REPLACE FUNCTION gin_extract_trgm(text, internal, internal)
CREATE OR REPLACE FUNCTION gin_extract_trgm(text, internal, int2, internal, internal)
RETURNS internal
AS 'MODULE_PATHNAME'
LANGUAGE C IMMUTABLE;
CREATE OR REPLACE FUNCTION gin_trgm_consistent(internal, int2, text, internal)
RETURNS internal
CREATE OR REPLACE FUNCTION gin_trgm_consistent(internal, int2, text, int4, internal, internal)
RETURNS bool
AS 'MODULE_PATHNAME'
LANGUAGE C IMMUTABLE;
@@ -127,6 +127,6 @@ AS
OPERATOR 1 % (text, text),
FUNCTION 1 btint4cmp (int4, int4),
FUNCTION 2 gin_extract_trgm (text, internal),
FUNCTION 3 gin_extract_trgm (text, internal, internal),
FUNCTION 4 gin_trgm_consistent (internal, int2, text, internal),
FUNCTION 3 gin_extract_trgm (text, internal, int2, internal, internal),
FUNCTION 4 gin_trgm_consistent (internal, int2, text, int4, internal, internal),
STORAGE int4;

47
contrib/pg_trgm/trgm_gin.c
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@@ -1,5 +1,5 @@
/*
* $PostgreSQL: pgsql/contrib/pg_trgm/trgm_gin.c,v 1.6 2008/11/12 13:43:54 teodor Exp $
* $PostgreSQL: pgsql/contrib/pg_trgm/trgm_gin.c,v 1.7 2009/03/25 22:19:01 tgl Exp $
*/
#include "trgm.h"
@@ -47,53 +47,40 @@ gin_extract_trgm(PG_FUNCTION_ARGS)
ptr++;
}
if (PG_NARGS() > 4)
{
/*
* Function called from query extracting
*/
Pointer **extra_data = (Pointer **) PG_GETARG_POINTER(4);
*extra_data = (Pointer*) palloc0(sizeof(Pointer)*(*nentries));
*(int32*)(*extra_data) = trglen;
}
}
PG_RETURN_POINTER(entries);
}
/*
* Per call strage for consistent functions to
* cache computed value from query
*/
typedef struct PerCallConsistentStorage {
int trglen;
text data[1]; /* query */
} PerCallConsistentStorage;
#define PCCSHDR_SZ offsetof(PerCallConsistentStorage, data)
Datum
gin_trgm_consistent(PG_FUNCTION_ARGS)
{
bool *check = (bool *) PG_GETARG_POINTER(0);
/* StrategyNumber strategy = PG_GETARG_UINT16(1); */
text *query = PG_GETARG_TEXT_P(2);
bool *recheck = (bool *) PG_GETARG_POINTER(3);
/* text *query = PG_GETARG_TEXT_P(2); */
/* int32 nkeys = PG_GETARG_INT32(3); */
Pointer *extra_data = (Pointer *) PG_GETARG_POINTER(4);
bool *recheck = (bool *) PG_GETARG_POINTER(5);
bool res = FALSE;
int4 i,
trglen,
ntrue = 0;
PerCallConsistentStorage *pccs = (PerCallConsistentStorage*) fcinfo->flinfo->fn_extra;
/* All cases served by this function are inexact */
*recheck = true;
if ( pccs == NULL || VARSIZE(pccs->data) != VARSIZE(query) || memcmp( pccs->data, query, VARSIZE(query) ) !=0 )
{
TRGM *trg = generate_trgm(VARDATA(query), VARSIZE(query) - VARHDRSZ);
if ( pccs )
pfree(pccs);
fcinfo->flinfo->fn_extra = MemoryContextAlloc(fcinfo->flinfo->fn_mcxt,
VARSIZE(query) + PCCSHDR_SZ);
pccs = (PerCallConsistentStorage*) fcinfo->flinfo->fn_extra;
pccs->trglen = ARRNELEM(trg);
memcpy( pccs->data, query, VARSIZE(query) );
}
trglen = pccs->trglen;
trglen = *(int32*)extra_data;
for (i = 0; i < trglen; i++)
if (check[i])

6
contrib/pg_trgm/uninstall_pg_trgm.sql
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@@ -1,4 +1,4 @@
/* $PostgreSQL: pgsql/contrib/pg_trgm/uninstall_pg_trgm.sql,v 1.6 2008/04/14 17:05:32 tgl Exp $ */
/* $PostgreSQL: pgsql/contrib/pg_trgm/uninstall_pg_trgm.sql,v 1.7 2009/03/25 22:19:01 tgl Exp $ */
-- Adjust this setting to control where the objects get dropped.
SET search_path = public;
@@ -25,9 +25,9 @@ DROP OPERATOR CLASS gin_trgm_ops USING gin;
DROP FUNCTION gin_extract_trgm(text, internal);
DROP FUNCTION gin_extract_trgm(text, internal, internal);
DROP FUNCTION gin_extract_trgm(text, internal, int2, internal, internal);
DROP FUNCTION gin_trgm_consistent(internal, int2, text, internal);
DROP FUNCTION gin_trgm_consistent(internal, int2, text, int4, internal, internal);
DROP OPERATOR % (text, text);