column_stats

Overview

Statistics on Columns

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) COLLATE utf8mb3_bin NOT NULL,
  `table_name` varchar(64) COLLATE utf8mb3_bin NOT NULL,
  `column_name` varchar(64) COLLATE utf8mb3_bin 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') COLLATE utf8mb3_bin DEFAULT NULL,
  `histogram` varbinary(255) DEFAULT NULL,
  PRIMARY KEY (`db_name`,`table_name`,`column_name`)
)

CHANGE HISTORY

Release Series

History

10.6 Enterprise

  • Schema changed in MariaDB Enterprise Server 10.6.4-1: ...

10.5 Enterprise

  • Present starting in MariaDB Enterprise Server 10.5.3-1.

10.4 Enterprise

  • Present starting in MariaDB Enterprise Server 10.4.6-1.

EXTERNAL REFERENCES