column_stats
This page is part of MariaDB's MariaDB Documentation.
The parent of this page is: System Tables for MariaDB Enterprise Server
Topics on this page:
Overview
Statistics on Columns
See also: System Tables for MariaDB Enterprise Server 10.6, in 10.5 ES, in 10.4 ES, in 10.3 ES, in 10.2 ES, in 10.6 CS, in 10.5 CS, in 10.4 CS, in 10.3 CS, and in 10.2 CS
See also: System Tables for MariaDB Enterprise Server 10.6, in 10.5 ES, and in 10.4 ES
DETAILS
SCHEMA
CREATE TABLE `column_stats` (
`db_name` varchar(64) NOT NULL,
`table_name` varchar(64) NOT NULL,
`column_name` varchar(64) NOT NULL,
`min_value` varbinary(255) DEFAULT NULL,
`max_value` varbinary(255) DEFAULT NULL,
`nulls_ratio` decimal(12,4) DEFAULT NULL,
`avg_length` decimal(12,4) DEFAULT NULL,
`avg_frequency` decimal(12,4) DEFAULT NULL,
`hist_size` tinyint(3) unsigned DEFAULT NULL,
`hist_type` enum('SINGLE_PREC_HB','DOUBLE_PREC_HB') DEFAULT NULL,
`histogram` varbinary(255) DEFAULT NULL,
PRIMARY KEY (`db_name`,`table_name`,`column_name`)
)
CHANGE HISTORY
Release Series | History |
---|---|
10.6 Enterprise |
|
10.6 Community |
|
10.5 Enterprise |
|
10.5 Community |
|
10.4 Enterprise |
|
10.4 Community |
|
10.3 Enterprise |
|
10.3 Community |
|
10.2 Enterprise |
|
10.2 Community |
|
Release Series | History |
---|---|
10.6 Enterprise |
|
10.5 Enterprise |
|
10.4 Enterprise |
|
EXTERNAL REFERENCES
Additional information on this topic may be found in the MariaDB Public Knowledge Base.