database/mariadb
1
0
Fork 0
mirror of https://github.com/MariaDB/server.git synced 2025-07-27 18:02:13 +03:00
Code Activity

MDEV-34474 InnoDB: Failing assertion: stat_n_leaf_pages > 0 in ha_innobase::estimate_rows_upper_bound

Browse Source 
- Column stat_value and sample_size in mysql.innodb_index_stats
table is declared as BIGINT UNSIGNED without any check constraint.
user manually updates the value of stat_value and sample_size
to zero. InnoDB aborts the server while reading the statistics
information because InnoDB expects at least one leaf
page to exist for the index.

- To fix this issue, InnoDB should interpret the value of
stat_n_leaf_pages, stat_index_size in innodb_index_stats
stat_clustered_index_size, stat_sum_of_other_index_sizes
in innodb_table_stats as valid one even though user
mentioned it as 0.
This commit is contained in:
Thirunarayanan Balathandayuthapani
2024-07-10 11:43:03 +05:30
parent d0a2d4e755
commit 60125a77b7
3 changed files with 43 additions and 9 deletions
Download Patch File Download Diff File Expand all files Collapse all files

10
mysql-test/suite/innodb/r/innodb_stats_fetch.result
View File

@ -174,3 +174,13 @@ SELECT * FROM INFORMATION_SCHEMA.INNODB_SYS_VIRTUAL LIMIT ROWS EXAMINED 5;
SELECT * FROM INFORMATION_SCHEMA.INNODB_SYS_FOREIGN LIMIT ROWS EXAMINED 5;
SELECT * FROM INFORMATION_SCHEMA.INNODB_SYS_FOREIGN_COLS LIMIT ROWS EXAMINED 5;
DROP TABLE t1;
#
# MDEV-34474 InnoDB: Failing assertion: stat_n_leaf_pages > 0
# in ha_innobase::estimate_rows_upper_bound
#
CREATE TABLE t (c1 INT,c2 INT,
INDEX(c1))STATS_PERSISTENT=1 ENGINE=INNODB;
UPDATE mysql.innodb_index_stats SET stat_value=0 WHERE database_name like "test" and table_name like 't';
UPDATE mysql.innodb_table_stats SET clustered_index_size= 0, sum_of_other_index_sizes=0 WHERE database_name like "test" and table_name like 't';
UPDATE t SET c1=+1 ORDER BY c2;
DROP TABLE t;