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MDEV-19526 heap number overflow on innodb_page_size=64k

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InnoDB only reserves 13 bits for the heap number in the record header,
limiting the heap number to be at most 8191. But, when using
innodb_page_size=64k and secondary index records of 7 bytes each,
it is possible to exceed the maximum heap number.

btr_cur_optimistic_insert(): Let the operation fail if the
maximum number of records would be exceeded.

page_mem_alloc_heap(): Move to the same compilation unit with the
only caller, and let the operation fail if the maximum heap number
has been allocated already.
This commit is contained in:
Marko Mäkelä
2020-08-12 18:21:53 +03:00
parent 7ad4709a3b
commit efd8af535a
10 changed files with 139 additions and 122 deletions
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7
mysql-test/suite/innodb/r/innodb-64k.result
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@@ -1084,3 +1084,10 @@ update t2 set col145=@b;
COMMIT;
drop table t2;
DROP TABLE t1;
#
# MDEV-19526 heap number overflow
#
CREATE TABLE t1(a SMALLINT NOT NULL UNIQUE AUTO_INCREMENT, KEY(a))
ENGINE=InnoDB;
INSERT INTO t1 (a) SELECT seq FROM seq_1_to_8191;
DROP TABLE t1;