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MDEV-24653 Assertion block->page.id.page_no() == index->page failed in innobase_add_instant_try()

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We may end up with an empty leaf page (containing only an ADD COLUMN
metadata record) that is not the root page.

innobase_add_instant_try(): Disable an optimization for a non-canonical
empty table that contains a metadata record somewhere else than in
the root page.

btr_pcur_store_position(): Tolerate a non-canonical empty table.
This commit is contained in:
Marko Mäkelä
2021-01-25 10:24:35 +02:00
parent 0e10d7ea14
commit eaeb8ec4b8
4 changed files with 61 additions and 10 deletions
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19
mysql-test/suite/innodb/r/instant_alter_debug.result
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@ -263,7 +263,6 @@ a b vb
4 NULL NULL
5 NULL NULL
DROP TABLE t1;
SET GLOBAL innodb_purge_rseg_truncate_frequency = @save_frequency;
#
# MDEV-21045 AddressSanitizer: use-after-poison in mem_heap_dup / row_log_table_get_pk_col
#
@ -282,3 +281,21 @@ connection default;
SET DEBUG_SYNC='RESET';
disconnect con2;
DROP TABLE t1;
#
# MDEV-24653 Assertion block->page.id.page_no() == index->page failed
# in innobase_add_instant_try()
#
SET @saved_limit = @@GLOBAL.innodb_limit_optimistic_insert_debug;
SET GLOBAL innodb_limit_optimistic_insert_debug = 2;
CREATE TABLE t1 (a INT PRIMARY KEY) ENGINE=InnoDB;
INSERT INTO t1 VALUES (1),(2),(3),(4);
ALTER TABLE t1 ADD COLUMN b INT;
DELETE FROM t1;
InnoDB 0 transactions not purged
ALTER TABLE t1 ADD COLUMN c INT;
SELECT * FROM t1;
a b c
DROP TABLE t1;
SET GLOBAL innodb_limit_optimistic_insert_debug = @saved_limit;
# End of 10.3 tests
SET GLOBAL innodb_purge_rseg_truncate_frequency = @save_frequency;