mariadb

Tree: 1009832c13

Author	SHA1	Message	Date
Igor Babaev	1009832c13	Added histogams for table columns.	13 years ago
Igor Babaev	2447bc4c81	Addressed the following issue from the review of the patch for engine-independent statistics. When the primary key was dropped or changed statistics on secondary indexes for the prefixes that included components of the primary key was not removed from the table mysql.index_stats. Also fixed: in the some cases when a column was changed statistics on the indexes that included this column was not removed from the table mysql.index_stats. Also disabled the test mdev-504 for --ps-protocol.	13 years ago
Igor Babaev	dd119466c3	Addressed the following issues from the review of the patch: 1. The PERSISTENT FOR clause of the ANALYZE command overrides the setting of the system variable use_stat_tables: with this clause ANALYZE unconditionally collects persistent statistics. 2. ANALYZE collects persistent statistics only for tables of the USER category. So it never collects persistent statistics for system tables.	13 years ago
Igor Babaev	b110132516	Changed the names of the system tables for statistical data: table_stat -> table_stats column_stat -> column_stats index_stat -> index_stats to be in line with the names of innodb statistical tables from mysql-5.6: innodb_table_stats and innodb_index_stats.	13 years ago
Igor Babaev	fd7059d208	Fixed the following problem: the syntax of the ANALYZE command did not returned an error if the list of the specified index names contained the name 'primary'.	13 years ago
Igor Babaev	cb0a5c84b6	Made the output of the newly added test cases from statistics.test platform independent. Adjusted results of funcs_1.is_columns_mysql_embedded.	13 years ago
Igor Babaev	47fae7f08f	Added procedures to delete records by keys from statistical tables. Now when a table is dropped the statistics on the table is removed from the statistical tables. If the table is altered in such a way that a column is dropped or the type of the column is changed then statistics on the column is removed from the table column_stat. It also triggers removal of the statistics on the indexes who use this column as its component. Added procedures that changes the names of the tables or columns in the statistical tables for. These procedures are used when tables/columns are renamed. Also partly re-factored the code that introduced the persistent statistical tables. Added test cases into statistics.test to cover the new code.	13 years ago
Igor Babaev	4ff6fd34da	Changed the type of all double columns in the system statistical tables mysql.column_stat, mysql.table_stat for the type DECIMAL(12,4). When cached the values from these columns are multiplied by factor 10^5 and stored as ulong numbers now.	14 years ago
Igor Babaev	f549f495f7	Removed the server option --stat-tables. Renamed the system variable optimizer_use_stat_tables to use_stat_tables. This variable now has only 3 possible values: 'never', 'complementary', 'preferably'. If the server has been launched with --use-stat-tables='complementary'\|'preferably' then the statictics tables can be employed by the optimizer and by the ANALYZE command.	14 years ago
Igor Babaev	055477ae52	Support of the extended syntax for ANALYZE.	14 years ago
Igor Babaev	d0dc6e07f6	Made statistics.test platform independent.	14 years ago
Igor Babaev	7895f510a4	In statistics.test: Saved at the very beginning and restored at the very end the value of optimizer_use_stat_tables.	14 years ago
Igor Babaev	e8497370b9	The main patch for the MWL#248 back-ported from lp:~igorb-seattle/mysql-server/mysql-azalea-wl4777.	14 years ago

13 Commits (1009832c13380365c03f77fcabd0fda470b73390)