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Fix and test-case for the bug #775: SELECT misses rows in indexed HEAP table columns.

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This commit is contained in:
ram@mysql.r18.ru
2003-07-03 18:21:59 +05:00
parent 3308f226ee
commit 726fca05f7
3 changed files with 29 additions and 3 deletions
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9
heap/hp_open.c
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@ -46,9 +46,12 @@ HP_INFO *heap_open(const char *name, int mode, uint keys, HP_KEYDEF *keydef,
for (j=length=0 ; j < keydef[i].keysegs; j++) for (j=length=0 ; j < keydef[i].keysegs; j++)
{ {
length+=keydef[i].seg[j].length; length+=keydef[i].seg[j].length;
if (keydef[i].seg[j].null_bit && if (keydef[i].seg[j].null_bit)
!(keydef[i].flag & HA_NULL_ARE_EQUAL)) {
keydef[i].flag |= HA_NULL_PART_KEY; length++;
if (!(keydef[i].flag & HA_NULL_ARE_EQUAL))
keydef[i].flag |= HA_NULL_PART_KEY;
}
} }
keydef[i].length=length; keydef[i].length=length;
if (length > max_length) if (length > max_length)

14
mysql-test/r/heap.result
View File

@ -197,6 +197,20 @@ a b
INSERT INTO t1 VALUES (1,3); INSERT INTO t1 VALUES (1,3);
Duplicate entry '3' for key 1 Duplicate entry '3' for key 1
DROP TABLE t1; DROP TABLE t1;
CREATE TABLE t1 (
a int default NULL,
key a (a)
) TYPE=HEAP;
INSERT INTO t1 VALUES (10), (10), (10);
EXPLAIN SELECT * FROM t1 WHERE a=10;
table type possible_keys key key_len ref rows Extra
t1 ref a a 5 const 10 Using where
SELECT * FROM t1 WHERE a=10;
a
10
10
10
DROP TABLE t1;
CREATE TABLE t1 (a int not null, primary key(a)) type=heap; CREATE TABLE t1 (a int not null, primary key(a)) type=heap;
INSERT into t1 values (1),(2),(3),(4),(5),(6),(7),(8),(9),(10),(11); INSERT into t1 values (1),(2),(3),(4),(5),(6),(7),(8),(9),(10),(11);
DELETE from t1 where a < 100; DELETE from t1 where a < 100;

9
mysql-test/t/heap.test
View File

@ -129,6 +129,15 @@ SELECT * FROM t1 WHERE b<=>NULL;
INSERT INTO t1 VALUES (1,3); INSERT INTO t1 VALUES (1,3);
DROP TABLE t1; DROP TABLE t1;
CREATE TABLE t1 (
a int default NULL,
key a (a)
) TYPE=HEAP;
INSERT INTO t1 VALUES (10), (10), (10);
EXPLAIN SELECT * FROM t1 WHERE a=10;
SELECT * FROM t1 WHERE a=10;
DROP TABLE t1;
# #
# Test when deleting all rows # Test when deleting all rows
# #