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BUG#51866 - crash with repair by sort and fulltext keys

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Repairing MyISAM table with fulltext indexes and low
myisam_sort_buffer_size may crash the server.

Estimation of number of index entries was done incorrectly,
causing further assertion failure or server crash.

Docs note: min value for myisam_sort_buffer_size has been
changed from 4 to 4096.
This commit is contained in:
Sergey Vojtovich
2010-03-25 16:08:21 +04:00
parent 9ecdd588c5
commit 3f641968fc
8 changed files with 70 additions and 33 deletions
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4
mysql-test/r/myisam.result
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@ -2313,6 +2313,8 @@ INSERT INTO t1 SELECT a+1280,b FROM t1;
INSERT INTO t1 SELECT a+2560,b FROM t1;
INSERT INTO t1 SELECT a+5120,b FROM t1;
SET myisam_sort_buffer_size=4;
Warnings:
Warning 1292 Truncated incorrect myisam_sort_buffer_size value: '4'
REPAIR TABLE t1;
Table Op Msg_type Msg_text
test.t1 repair error myisam_sort_buffer_size is too small
@ -2363,6 +2365,8 @@ CREATE TABLE t1(a CHAR(255), KEY(a));
SELECT * FROM t1, t1 AS a1;
a a
SET myisam_sort_buffer_size=4;
Warnings:
Warning 1292 Truncated incorrect myisam_sort_buffer_size value: '4'
INSERT INTO t1 VALUES
('0'),('0'),('0'),('0'),('0'),('0'),('0'),('0'),('0'),('0'),
('0'),('0'),('0'),('0'),('0'),('0'),('0'),('0'),('0'),('0'),