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Bug #30825: Problems when putting a non-spatial index on a GIS column

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Fixed the usage of spatial data (and Point in specific) with 
 non-spatial indexes.
 Several problems :
   - The length of the Point class was not updated to include the 
     spatial reference system identifier. Fixed by increasing with 4 
     bytes.
   - The storage length of the spatial columns was not accounting for
     the length that is prepended to it. Fixed by treating the 
     spatial data columns as blobs (and thus increasing the storage
     length)
   - When creating the key image for comparison in index read wrong
     key image was created (the one needed for and r-tree search,
     not the one for b-tree/other search). Fixed by treating the
     spatial data columns as blobs (and creating the correct kind of
     image based on the index type).
This commit is contained in:
gkodinov/kgeorge@magare.gmz
2007-10-10 16:26:02 +03:00
parent 20ec6605d3
commit e971b18f06
14 changed files with 181 additions and 39 deletions
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39
mysql-test/r/gis.result
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@ -894,4 +894,43 @@ drop table t1, t2;
SELECT 1;
1
1
CREATE TABLE t1 (p POINT);
CREATE TABLE t2 (p POINT, INDEX(p));
INSERT INTO t1 VALUES (POINTFROMTEXT('POINT(1 2)'));
INSERT INTO t2 VALUES (POINTFROMTEXT('POINT(1 2)'));
SELECT COUNT(*) FROM t1 WHERE p=POINTFROMTEXT('POINT(1 2)');
COUNT(*)
1
EXPLAIN
SELECT COUNT(*) FROM t2 WHERE p=POINTFROMTEXT('POINT(1 2)');
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t2 system p NULL NULL NULL 1
SELECT COUNT(*) FROM t2 WHERE p=POINTFROMTEXT('POINT(1 2)');
COUNT(*)
1
INSERT INTO t1 VALUES (POINTFROMTEXT('POINT(1 2)'));
INSERT INTO t2 VALUES (POINTFROMTEXT('POINT(1 2)'));
EXPLAIN
SELECT COUNT(*) FROM t1 WHERE p=POINTFROMTEXT('POINT(1 2)');
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 ALL NULL NULL NULL NULL 2 Using where
SELECT COUNT(*) FROM t1 WHERE p=POINTFROMTEXT('POINT(1 2)');
COUNT(*)
2
EXPLAIN
SELECT COUNT(*) FROM t2 WHERE p=POINTFROMTEXT('POINT(1 2)');
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t2 ref p p 28 const 1 Using where
SELECT COUNT(*) FROM t2 WHERE p=POINTFROMTEXT('POINT(1 2)');
COUNT(*)
2
EXPLAIN
SELECT COUNT(*) FROM t2 IGNORE INDEX(p) WHERE p=POINTFROMTEXT('POINT(1 2)');
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t2 ALL NULL NULL NULL NULL 2 Using where
SELECT COUNT(*) FROM t2 IGNORE INDEX(p) WHERE p=POINTFROMTEXT('POINT(1 2)');
COUNT(*)
2
DROP TABLE t1, t2;
End of 5.0 tests
End of 5.0 tests