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MDEV-20149 innodb.innodb-system-table-view fails with wrong result

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The test occasionally fails with different table reference count
due to purge activity after INSERT operations (MDEV-12288).
Wait for purge before accessing dict_table_t::n_ref_count.
This commit is contained in:
Marko Mäkelä
2019-08-29 18:25:24 +03:00
parent d4246e25e5
commit d58437d195
2 changed files with 12 additions and 0 deletions
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5
mysql-test/suite/innodb/r/innodb-system-table-view.result
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@ -1,3 +1,5 @@
SET @save_frequency=@@GLOBAL.innodb_purge_rseg_truncate_frequency;
SET GLOBAL innodb_purge_rseg_truncate_frequency=1;
SELECT table_id INTO @table_stats_id FROM information_schema.innodb_sys_tables
WHERE name = 'mysql/innodb_table_stats';
SELECT table_id INTO @index_stats_id FROM information_schema.innodb_sys_tables
@ -108,6 +110,7 @@ SELECT * FROM INFORMATION_SCHEMA.INNODB_SYS_FOREIGN_COLS;
ID FOR_COL_NAME REF_COL_NAME POS
test/constraint_test parent_id id 0
INSERT INTO parent VALUES(1);
InnoDB 0 transactions not purged
SELECT name, num_rows, ref_count
FROM INFORMATION_SCHEMA.INNODB_SYS_TABLESTATS
WHERE name LIKE "%parent";
@ -169,6 +172,7 @@ INSERT INTO parent VALUES(1, 9);
SELECT * FROM parent WHERE id IN (SELECT id FROM parent);
id newid
1 9
InnoDB 0 transactions not purged
SELECT name, num_rows, ref_count
FROM INFORMATION_SCHEMA.INNODB_SYS_TABLESTATS
WHERE name LIKE "%parent";
@ -176,3 +180,4 @@ name num_rows ref_count
test/parent 1 2
DROP TABLE child;
DROP TABLE parent;
SET GLOBAL innodb_purge_rseg_truncate_frequency=@save_frequency;