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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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7
heap/hp_open.c
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@ -46,10 +46,13 @@ HP_INFO *heap_open(const char *name, int mode, uint keys, HP_KEYDEF *keydef,
for (j=length=0 ; j < keydef[i].keysegs; j++)
{
length+=keydef[i].seg[j].length;
if (keydef[i].seg[j].null_bit &&
!(keydef[i].flag & HA_NULL_ARE_EQUAL))
if (keydef[i].seg[j].null_bit)
{
length++;
if (!(keydef[i].flag & HA_NULL_ARE_EQUAL))
keydef[i].flag |= HA_NULL_PART_KEY;
}
}
keydef[i].length=length;
if (length > max_length)
max_length=length;

14
mysql-test/r/heap.result
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@ -197,6 +197,20 @@ a b
INSERT INTO t1 VALUES (1,3);
Duplicate entry '3' for key 1
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;
INSERT into t1 values (1),(2),(3),(4),(5),(6),(7),(8),(9),(10),(11);
DELETE from t1 where a < 100;

9
mysql-test/t/heap.test
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@ -129,6 +129,15 @@ SELECT * FROM t1 WHERE b<=>NULL;
INSERT INTO t1 VALUES (1,3);
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
#