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MDEV-13227: Assertion failure len < 16384 in file rem0rec.cc line 1285

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Crashes with innodb_page_size=64K. Does not crash at <= 32K.

Problem was that when blob record that was earlier < 16k is
enlarged at update wo that length > 16K it should be stored
externally. However, that was not enforced when page-size = 64K
(note that 16K+1 < 64K/2 i.e. half of the btree leaf page).

btr_cur_optimistic_update: limit max record size to 16K
or in REDUNDANT row format to 16K-1.
This commit is contained in:
Jan Lindström
2017-07-20 11:24:01 +03:00
parent f58142f644
commit d1b3e428d4
5 changed files with 102 additions and 8 deletions
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38
mysql-test/suite/innodb/r/innodb-enlarge-blob.result Normal file
View File

@ -0,0 +1,38 @@
CREATE TABLE t1 (a LONGTEXT) ENGINE=INNODB DEFAULT CHARSET=UTF8 ROW_FORMAT=DYNAMIC;
SHOW WARNINGS;
Level Code Message
INSERT INTO t1 SELECT CONCAT('A', SPACE(4087), 'B');
INSERT INTO t1 SELECT CONCAT('A', SPACE(4087), 'B') FROM t1;
INSERT INTO t1 SELECT CONCAT('A', SPACE(4087), 'B') FROM t1;
INSERT INTO t1 SELECT CONCAT('A', SPACE(4087), 'B') FROM t1;
INSERT INTO t1 SELECT CONCAT('A', SPACE(4087), 'B') FROM t1;
INSERT INTO t1 SELECT CONCAT('A', SPACE(4087), 'B') FROM t1;
INSERT INTO t1 SELECT CONCAT('A', SPACE(4087), 'B') FROM t1;
INSERT INTO t1 SELECT CONCAT('A', SPACE(4087), 'B') FROM t1;
INSERT INTO t1 SELECT CONCAT('A', SPACE(4087), 'B') FROM t1;
INSERT INTO t1 SELECT CONCAT('A', SPACE(4087), 'B') FROM t1;
INSERT INTO t1 SELECT CONCAT('A', SPACE(4087), 'B') FROM t1;
UPDATE t1 SET a=CONCAT(a, RAND(), a);
UPDATE t1 SET a=CONCAT(a, RAND(), a);
UPDATE t1 SET a=CONCAT(a, RAND(), a);
SELECT * from t1;
DROP TABLE t1;
CREATE TABLE t1 (a LONGTEXT) ENGINE=INNODB DEFAULT CHARSET=UTF8 ROW_FORMAT=REDUNDANT;
SHOW WARNINGS;
Level Code Message
INSERT INTO t1 SELECT CONCAT('A', SPACE(4087), 'B');
INSERT INTO t1 SELECT CONCAT('A', SPACE(4087), 'B') FROM t1;
INSERT INTO t1 SELECT CONCAT('A', SPACE(4087), 'B') FROM t1;
INSERT INTO t1 SELECT CONCAT('A', SPACE(4087), 'B') FROM t1;
INSERT INTO t1 SELECT CONCAT('A', SPACE(4087), 'B') FROM t1;
INSERT INTO t1 SELECT CONCAT('A', SPACE(4087), 'B') FROM t1;
INSERT INTO t1 SELECT CONCAT('A', SPACE(4087), 'B') FROM t1;
INSERT INTO t1 SELECT CONCAT('A', SPACE(4087), 'B') FROM t1;
INSERT INTO t1 SELECT CONCAT('A', SPACE(4087), 'B') FROM t1;
INSERT INTO t1 SELECT CONCAT('A', SPACE(4087), 'B') FROM t1;
INSERT INTO t1 SELECT CONCAT('A', SPACE(4087), 'B') FROM t1;
UPDATE t1 SET a=CONCAT(a, RAND(), a);
UPDATE t1 SET a=CONCAT(a, RAND(), a);
UPDATE t1 SET a=CONCAT(a, RAND(), a);
SELECT * from t1;
DROP TABLE t1;