database/mariadb-columnstore-engine
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MCOL-2061 Add upgrade path to rebuild FRM files

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A major upgrade (1.1 -> 1.2 for example) may have issues due to stale
FRM table IDs. This commit adds a stored procedure that changes the
table comment to empty on every ColumnStore table to repair the IDs.

The user should run this as part of the upgrade procedure between major
versions.
This commit is contained in:
Andrew Hutchings
2019-04-04 15:32:38 +01:00
parent 7b1f461dde
commit 6f15c97591
2 changed files with 21 additions and 1 deletions
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19
dbcon/mysql/columnstore_info.sql
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@ -98,4 +98,23 @@ BEGIN
SELECT CONCAT((SELECT SUM(data_size) FROM information_schema.columnstore_extents ce left join information_schema.columnstore_columns cc on ce.object_id = cc.object_id where compression_type='Snappy') / (SELECT SUM(compressed_data_size) FROM information_schema.columnstore_files WHERE compressed_data_size IS NOT NULL), ':1') COMPRESSION_RATIO;
END //
create procedure columnstore_upgrade()
`columnstore_upgrade`: BEGIN
DECLARE done INTEGER DEFAULT 0;
DECLARE schema_table VARCHAR(100) DEFAULT "";
DECLARE table_list CURSOR FOR select concat('`', table_schema,'`.`',table_name,'`') from information_schema.tables where engine='columnstore';
DECLARE CONTINUE HANDLER FOR NOT FOUND SET done = 1;
OPEN table_list;
tlist: LOOP
FETCH table_list INTO schema_table;
IF done = 1 THEN LEAVE tlist;
END IF;
SET @sql_query = concat('ALTER TABLE ', schema_table, ' COMMENT=\'\'');
PREPARE stmt FROM @sql_query;
EXECUTE stmt;
DEALLOCATE PREPARE stmt;
END LOOP;
END //
delimiter ;
DELIMITER ;