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Commit971007c

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Hash opclass for spoint
Besides hash indexes on spoint, this enables "select distinct spointfrom tbl" queries.Close#101.
1 parent81939cf commit971007c

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6 files changed

+94
-2
lines changed

6 files changed

+94
-2
lines changed

‎Makefile‎

Lines changed: 2 additions & 2 deletions
Original file line numberDiff line numberDiff line change
@@ -55,7 +55,7 @@ CRUSH_TESTS = init_extended circle_extended
5555
PGS_SQL = pgs_types.sql pgs_point.sql pgs_euler.sql pgs_circle.sql\
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pgs_line.sql pgs_ellipse.sql pgs_polygon.sql pgs_path.sql\
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pgs_box.sql pgs_contains_ops.sql pgs_contains_ops_compat.sql\
58-
pgs_gist.sql gnomo.sql pgs_brin.sql pgs_circle_sel.sql
58+
pgs_gist.sql gnomo.sql pgs_brin.sql pgs_circle_sel.sql pgs_hash.sql
5959

6060
ifneq ($(USE_HEALPIX),0)
6161
TESTS += healpix moc moc1 moc100 mocautocast
@@ -199,7 +199,7 @@ ifeq ($(has_index_options),y)
199199
pg_sphere--1.3.1--1.3.2.sql: pgs_moc_options.sql.in
200200
endif
201201
endif
202-
pg_sphere--1.3.1--1.3.2.sql: pgs_circle_sel.sql.in
202+
pg_sphere--1.3.1--1.3.2.sql: pgs_circle_sel.sql.in pgs_hash.sql.in
203203
cat upgrade_scripts/$@.in$^>$@
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# end of local stuff

‎expected/index.out‎

Lines changed: 36 additions & 0 deletions
Original file line numberDiff line numberDiff line change
@@ -195,3 +195,39 @@ EXPLAIN (COSTS OFF) SELECT count(*) FROM spheretmp1b WHERE p = spoint '(3.09 , 1
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4
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(1 row)
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-- test hash opclass
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CREATE TABLE spheretmp1c AS TABLE spheretmp1;
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SELECT p FROM spheretmp1c WHERE p <@ scircle '<(1,1),0.2>' ORDER BY p::text;
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p
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---------------
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(0.67 , 0.97)
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(0.67 , 0.97)
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(0.67 , 0.97)
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(0.67 , 0.97)
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(1.07 , 1.09)
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(1.07 , 1.09)
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(1.07 , 1.09)
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(1.07 , 1.09)
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(1.24 , 0.95)
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(1.24 , 0.95)
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(1.24 , 0.95)
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(1.24 , 0.95)
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(12 rows)
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WITH points AS (SELECT DISTINCT p FROM spheretmp1c WHERE p <@ scircle '<(1,1),0.2>')
218+
SELECT p FROM points ORDER BY p::text;
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p
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---------------
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(0.67 , 0.97)
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(1.07 , 1.09)
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(1.24 , 0.95)
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(3 rows)
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CREATE INDEX spheretmp1c_hash_idx ON spheretmp1c USING hash(p);
227+
EXPLAIN (COSTS OFF) SELECT * FROM spheretmp1c WHERE p = '(0.67 , 0.97)';
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QUERY PLAN
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------------------------------------------------------
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Index Scan using spheretmp1c_hash_idx on spheretmp1c
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Index Cond: (p = '(0.67 , 0.97)'::spoint)
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(2 rows)
233+

‎pgs_hash.sql.in‎

Lines changed: 19 additions & 0 deletions
Original file line numberDiff line numberDiff line change
@@ -0,0 +1,19 @@
1+
CREATE FUNCTION spoint_hash32 (spoint)
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RETURNS int
3+
IMMUTABLE STRICT
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PARALLEL SAFE
5+
LANGUAGE C
6+
AS 'MODULE_PATHNAME', 'spherepoint_hash32';
7+
8+
UPDATE pg_operator
9+
SET oprcanhash = true
10+
WHERE oprname = '=' AND
11+
oprleft = 'spoint'::regtype AND oprright = 'spoint'::regtype;
12+
13+
/* PG17: ALTER OPERATOR = (spoint, spoint) SET (HASHES); */
14+
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CREATE OPERATOR CLASS spoint_hash_ops
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DEFAULT FOR TYPE spoint USING hash
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AS
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OPERATOR 1 = (spoint, spoint),
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FUNCTION 1 spoint_hash32(spoint);

‎sql/index.sql‎

Lines changed: 11 additions & 0 deletions
Original file line numberDiff line numberDiff line change
@@ -76,3 +76,14 @@ EXPLAIN (COSTS OFF) SELECT count(*) FROM spheretmp1b WHERE p <@ scircle '<(1,1),
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SELECTcount(*)FROM spheretmp1bWHERE p<@ scircle'<(1,1),0.3>';
7777
EXPLAIN (COSTS OFF)SELECTcount(*)FROM spheretmp1bWHERE p= spoint'(3.09 , 1.25)';
7878
SELECTcount(*)FROM spheretmp1bWHERE p= spoint'(3.09 , 1.25)';
79+
80+
-- test hash opclass
81+
82+
CREATETABLEspheretmp1cAS TABLE spheretmp1;
83+
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SELECT pFROM spheretmp1cWHERE p<@ scircle'<(1,1),0.2>'ORDER BY p::text;
85+
WITH pointsAS (SELECT DISTINCT pFROM spheretmp1cWHERE p<@ scircle'<(1,1),0.2>')
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SELECT pFROM pointsORDER BY p::text;
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88+
CREATEINDEXspheretmp1c_hash_idxON spheretmp1c USING hash(p);
89+
EXPLAIN (COSTS OFF)SELECT*FROM spheretmp1cWHERE p='(0.67 , 0.97)';

‎src/point.c‎

Lines changed: 21 additions & 0 deletions
Original file line numberDiff line numberDiff line change
@@ -16,6 +16,7 @@ PG_FUNCTION_INFO_V1(spherepoint_y);
1616
PG_FUNCTION_INFO_V1(spherepoint_z);
1717
PG_FUNCTION_INFO_V1(spherepoint_xyz);
1818
PG_FUNCTION_INFO_V1(spherepoint_equal);
19+
PG_FUNCTION_INFO_V1(spherepoint_hash32);
1920

2021
staticOidpoint_id=InvalidOid;
2122

@@ -309,3 +310,23 @@ spherepoint_equal(PG_FUNCTION_ARGS)
309310

310311
PG_RETURN_BOOL(spoint_eq(p1,p2));
311312
}
313+
314+
Datum
315+
spherepoint_hash32(PG_FUNCTION_ARGS)
316+
{
317+
SPoint*p1= (SPoint*)PG_GETARG_POINTER(0);
318+
319+
unionspoint_int32 {
320+
SPointp;
321+
struct {
322+
int32f1,f2,f3,f4;
323+
};
324+
}u;
325+
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int32res;
327+
328+
u.p=*p1;
329+
res=u.f1 ^u.f2 ^u.f3 ^u.f4;
330+
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PG_RETURN_INT32(res);
332+
}

‎src/point.h‎

Lines changed: 5 additions & 0 deletions
Original file line numberDiff line numberDiff line change
@@ -102,4 +102,9 @@ Datumspherepoint_xyz(PG_FUNCTION_ARGS);
102102
*/
103103
Datumspherepoint_equal(PG_FUNCTION_ARGS);
104104

105+
/*
106+
* Compute a 32-bit hash value of a point.
107+
*/
108+
Datumspherepoint_hash32(PG_FUNCTION_ARGS);
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105110
#endif

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