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Add bool GiST opclass to btree_gist 

Adds bool opclass to btree_gist extension, to allow creating GiST
indexes on bool columns. GiST indexes on a single bool column don't seem
particularly useful, but this allows defining exclusion constraings
involving a bool column, for example.

Author: Emre Hasegeli
Reviewed-by: Andrey Borodin
Discussion: https://postgr.es/m/CAE2gYzyDKJBZngssR84VGZEN=Ux=V9FV23QfPgo+7-yYnKKg4g@mail.gmail.com
This commit is contained in:
Tomas Vondra 2021-11-06 17:00:43 +01:00
parent dafcf887da
commit 57e3c5160b
8 changed files with 382 additions and 3 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

5
contrib/btree_gist/Makefile
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@ -5,6 +5,7 @@ MODULE_big = btree_gist
OBJS = \
$(WIN32RES) \
btree_bit.o \
btree_bool.o \
btree_bytea.o \
btree_cash.o \
btree_date.o \
@ -32,12 +33,12 @@ EXTENSION = btree_gist
DATA = btree_gist--1.0--1.1.sql \
btree_gist--1.1--1.2.sql btree_gist--1.2.sql btree_gist--1.2--1.3.sql \
btree_gist--1.3--1.4.sql btree_gist--1.4--1.5.sql \
btree_gist--1.5--1.6.sql
btree_gist--1.5--1.6.sql btree_gist--1.6--1.7.sql
PGFILEDESC = "btree_gist - B-tree equivalent GiST operator classes"
REGRESS = init int2 int4 int8 float4 float8 cash oid timestamp timestamptz \
time timetz date interval macaddr macaddr8 inet cidr text varchar char \
bytea bit varbit numeric uuid not_equal enum
bytea bit varbit numeric uuid not_equal enum bool
SHLIB_LINK += $(filter -lm, $(LIBS))

169
contrib/btree_gist/btree_bool.c Normal file
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@ -0,0 +1,169 @@
/*
* contrib/btree_gist/btree_bool.c
*/
#include "postgres.h"
#include "btree_gist.h"
#include "btree_utils_num.h"
#include "common/int.h"
typedef struct boolkey
{
bool lower;
bool upper;
} boolKEY;
/*
** bool ops
*/
PG_FUNCTION_INFO_V1(gbt_bool_compress);
PG_FUNCTION_INFO_V1(gbt_bool_fetch);
PG_FUNCTION_INFO_V1(gbt_bool_union);
PG_FUNCTION_INFO_V1(gbt_bool_picksplit);
PG_FUNCTION_INFO_V1(gbt_bool_consistent);
PG_FUNCTION_INFO_V1(gbt_bool_penalty);
PG_FUNCTION_INFO_V1(gbt_bool_same);
static bool
gbt_boolgt(const void *a, const void *b, FmgrInfo *flinfo)
{
return (*((const bool *) a) > *((const bool *) b));
}
static bool
gbt_boolge(const void *a, const void *b, FmgrInfo *flinfo)
{
return (*((const bool *) a) >= *((const bool *) b));
}
static bool
gbt_booleq(const void *a, const void *b, FmgrInfo *flinfo)
{
return (*((const bool *) a) == *((const bool *) b));
}
static bool
gbt_boolle(const void *a, const void *b, FmgrInfo *flinfo)
{
return (*((const bool *) a) <= *((const bool *) b));
}
static bool
gbt_boollt(const void *a, const void *b, FmgrInfo *flinfo)
{
return (*((const bool *) a) < *((const bool *) b));
}
static int
gbt_boolkey_cmp(const void *a, const void *b, FmgrInfo *flinfo)
{
boolKEY *ia = (boolKEY *) (((const Nsrt *) a)->t);
boolKEY *ib = (boolKEY *) (((const Nsrt *) b)->t);
if (ia->lower == ib->lower)
{
if (ia->upper == ib->upper)
return 0;
return (ia->upper > ib->upper) ? 1 : -1;
}
return (ia->lower > ib->lower) ? 1 : -1;
}
static const gbtree_ninfo tinfo =
{
gbt_t_bool,
sizeof(bool),
4, /* sizeof(gbtreekey4) */
gbt_boolgt,
gbt_boolge,
gbt_booleq,
gbt_boolle,
gbt_boollt,
gbt_boolkey_cmp,
};
/**************************************************
* bool ops
**************************************************/
Datum
gbt_bool_compress(PG_FUNCTION_ARGS)
{
GISTENTRY *entry = (GISTENTRY *) PG_GETARG_POINTER(0);
PG_RETURN_POINTER(gbt_num_compress(entry, &tinfo));
}
Datum
gbt_bool_fetch(PG_FUNCTION_ARGS)
{
GISTENTRY *entry = (GISTENTRY *) PG_GETARG_POINTER(0);
PG_RETURN_POINTER(gbt_num_fetch(entry, &tinfo));
}
Datum
gbt_bool_consistent(PG_FUNCTION_ARGS)
{
GISTENTRY *entry = (GISTENTRY *) PG_GETARG_POINTER(0);
bool query = PG_GETARG_INT16(1);
StrategyNumber strategy = (StrategyNumber) PG_GETARG_UINT16(2);
/* Oid subtype = PG_GETARG_OID(3); */
bool *recheck = (bool *) PG_GETARG_POINTER(4);
boolKEY *kkk = (boolKEY *) DatumGetPointer(entry->key);
GBT_NUMKEY_R key;
/* All cases served by this function are exact */
*recheck = false;
key.lower = (GBT_NUMKEY *) &kkk->lower;
key.upper = (GBT_NUMKEY *) &kkk->upper;
PG_RETURN_BOOL(gbt_num_consistent(&key, (void *) &query, &strategy,
GIST_LEAF(entry), &tinfo, fcinfo->flinfo));
}
Datum
gbt_bool_union(PG_FUNCTION_ARGS)
{
GistEntryVector *entryvec = (GistEntryVector *) PG_GETARG_POINTER(0);
void *out = palloc(sizeof(boolKEY));
*(int *) PG_GETARG_POINTER(1) = sizeof(boolKEY);
PG_RETURN_POINTER(gbt_num_union((void *) out, entryvec, &tinfo, fcinfo->flinfo));
}
Datum
gbt_bool_penalty(PG_FUNCTION_ARGS)
{
boolKEY *origentry = (boolKEY *) DatumGetPointer(((GISTENTRY *) PG_GETARG_POINTER(0))->key);
boolKEY *newentry = (boolKEY *) DatumGetPointer(((GISTENTRY *) PG_GETARG_POINTER(1))->key);
float *result = (float *) PG_GETARG_POINTER(2);
penalty_num(result, origentry->lower, origentry->upper, newentry->lower, newentry->upper);
PG_RETURN_POINTER(result);
}
Datum
gbt_bool_picksplit(PG_FUNCTION_ARGS)
{
PG_RETURN_POINTER(gbt_num_picksplit((GistEntryVector *) PG_GETARG_POINTER(0),
(GIST_SPLITVEC *) PG_GETARG_POINTER(1),
&tinfo, fcinfo->flinfo));
}
Datum
gbt_bool_same(PG_FUNCTION_ARGS)
{
boolKEY *b1 = (boolKEY *) PG_GETARG_POINTER(0);
boolKEY *b2 = (boolKEY *) PG_GETARG_POINTER(1);
bool *result = (bool *) PG_GETARG_POINTER(2);
*result = gbt_num_same((void *) b1, (void *) b2, &tinfo, fcinfo->flinfo);
PG_RETURN_POINTER(result);
}

62
contrib/btree_gist/btree_gist--1.6--1.7.sql Normal file
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@ -0,0 +1,62 @@
/* contrib/btree_gist/btree_gist--1.6--1.7.sql */
-- complain if script is sourced in psql, rather than via CREATE EXTENSION
\echo Use "ALTER EXTENSION btree_gist UPDATE TO '1.7'" to load this file. \quit
-- This upgrade scripts add support for bool.
-- Define the GiST support methods
CREATE FUNCTION gbt_bool_consistent(internal,bool,int2,oid,internal)
RETURNS bool
AS 'MODULE_PATHNAME'
LANGUAGE C IMMUTABLE STRICT;
CREATE FUNCTION gbt_bool_compress(internal)
RETURNS internal
AS 'MODULE_PATHNAME'
LANGUAGE C IMMUTABLE STRICT;
CREATE FUNCTION gbt_bool_fetch(internal)
RETURNS internal
AS 'MODULE_PATHNAME'
LANGUAGE C IMMUTABLE STRICT;
CREATE FUNCTION gbt_bool_penalty(internal,internal,internal)
RETURNS internal
AS 'MODULE_PATHNAME'
LANGUAGE C IMMUTABLE STRICT;
CREATE FUNCTION gbt_bool_picksplit(internal, internal)
RETURNS internal
AS 'MODULE_PATHNAME'
LANGUAGE C IMMUTABLE STRICT;
CREATE FUNCTION gbt_bool_union(internal, internal)
RETURNS gbtreekey8
AS 'MODULE_PATHNAME'
LANGUAGE C IMMUTABLE STRICT;
CREATE FUNCTION gbt_bool_same(gbtreekey8, gbtreekey8, internal)
RETURNS internal
AS 'MODULE_PATHNAME'
LANGUAGE C IMMUTABLE STRICT;
-- Create the operator class
CREATE OPERATOR CLASS gist_bool_ops
DEFAULT FOR TYPE bool USING gist
AS
OPERATOR 1 < ,
OPERATOR 2 <= ,
OPERATOR 3 = ,
OPERATOR 4 >= ,
OPERATOR 5 > ,
OPERATOR 6 <> ,
FUNCTION 1 gbt_bool_consistent (internal, bool, int2, oid, internal),
FUNCTION 2 gbt_bool_union (internal, internal),
FUNCTION 3 gbt_bool_compress (internal),
FUNCTION 4 gbt_decompress (internal),
FUNCTION 5 gbt_bool_penalty (internal, internal, internal),
FUNCTION 6 gbt_bool_picksplit (internal, internal),
FUNCTION 7 gbt_bool_same (gbtreekey8, gbtreekey8, internal),
FUNCTION 9 gbt_bool_fetch (internal),
STORAGE gbtreekey8;

2
contrib/btree_gist/btree_gist.control
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@ -1,6 +1,6 @@
# btree_gist extension
comment = 'support for indexing common datatypes in GiST'
default_version = '1.6'
default_version = '1.7'
module_pathname = '$libdir/btree_gist'
relocatable = true
trusted = true

1
contrib/btree_gist/btree_gist.h
View File

@ -32,6 +32,7 @@ enum gbtree_type
gbt_t_bpchar,
gbt_t_bytea,
gbt_t_bit,
gbt_t_bool,
gbt_t_inet,
gbt_t_uuid,
gbt_t_enum

8
contrib/btree_gist/btree_utils_num.c
View File

@ -19,6 +19,7 @@ gbt_num_compress(GISTENTRY *entry, const gbtree_ninfo *tinfo)
{
union
{
bool bo;
int16 i2;
int32 i4;
int64 i8;
@ -35,6 +36,10 @@ gbt_num_compress(GISTENTRY *entry, const gbtree_ninfo *tinfo)
switch (tinfo->t)
{
case gbt_t_bool:
v.bo = DatumGetBool(entry->key);
leaf = &v.bo;
break;
case gbt_t_int2:
v.i2 = DatumGetInt16(entry->key);
leaf = &v.i2;
@ -113,6 +118,9 @@ gbt_num_fetch(GISTENTRY *entry, const gbtree_ninfo *tinfo)
*/
switch (tinfo->t)
{
case gbt_t_bool:
datum = BoolGetDatum(*(bool *) entry->key);
break;
case gbt_t_int2:
datum = Int16GetDatum(*(int16 *) entry->key);
break;

96
contrib/btree_gist/expected/bool.out Normal file
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@ -0,0 +1,96 @@
-- bool check
CREATE TABLE booltmp (a bool);
INSERT INTO booltmp VALUES (false), (true);
SET enable_seqscan=on;
SELECT count(*) FROM booltmp WHERE a < true;
count
-------
1
(1 row)
SELECT count(*) FROM booltmp WHERE a <= true;
count
-------
2
(1 row)
SELECT count(*) FROM booltmp WHERE a = true;
count
-------
1
(1 row)
SELECT count(*) FROM booltmp WHERE a >= true;
count
-------
1
(1 row)
SELECT count(*) FROM booltmp WHERE a > true;
count
-------
0
(1 row)
CREATE INDEX boolidx ON booltmp USING gist ( a );
SET enable_seqscan=off;
SELECT count(*) FROM booltmp WHERE a < true;
count
-------
1
(1 row)
SELECT count(*) FROM booltmp WHERE a <= true;
count
-------
2
(1 row)
SELECT count(*) FROM booltmp WHERE a = true;
count
-------
1
(1 row)
SELECT count(*) FROM booltmp WHERE a >= true;
count
-------
1
(1 row)
SELECT count(*) FROM booltmp WHERE a > true;
count
-------
0
(1 row)
-- Test index-only scans
SET enable_bitmapscan=off;
EXPLAIN (COSTS OFF)
SELECT * FROM booltmp WHERE a;
QUERY PLAN
------------------------------------------
Index Only Scan using boolidx on booltmp
Filter: a
(2 rows)
SELECT * FROM booltmp WHERE a;
a
---
t
(1 row)
EXPLAIN (COSTS OFF)
SELECT * FROM booltmp WHERE NOT a;
QUERY PLAN
------------------------------------------
Index Only Scan using boolidx on booltmp
Filter: (NOT a)
(2 rows)
SELECT * FROM booltmp WHERE NOT a;
a
---
f
(1 row)

42
contrib/btree_gist/sql/bool.sql Normal file
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@ -0,0 +1,42 @@
-- bool check
CREATE TABLE booltmp (a bool);
INSERT INTO booltmp VALUES (false), (true);
SET enable_seqscan=on;
SELECT count(*) FROM booltmp WHERE a < true;
SELECT count(*) FROM booltmp WHERE a <= true;
SELECT count(*) FROM booltmp WHERE a = true;
SELECT count(*) FROM booltmp WHERE a >= true;
SELECT count(*) FROM booltmp WHERE a > true;
CREATE INDEX boolidx ON booltmp USING gist ( a );
SET enable_seqscan=off;
SELECT count(*) FROM booltmp WHERE a < true;
SELECT count(*) FROM booltmp WHERE a <= true;
SELECT count(*) FROM booltmp WHERE a = true;
SELECT count(*) FROM booltmp WHERE a >= true;
SELECT count(*) FROM booltmp WHERE a > true;
-- Test index-only scans
SET enable_bitmapscan=off;
EXPLAIN (COSTS OFF)
SELECT * FROM booltmp WHERE a;
SELECT * FROM booltmp WHERE a;
EXPLAIN (COSTS OFF)
SELECT * FROM booltmp WHERE NOT a;
SELECT * FROM booltmp WHERE NOT a;