No cache version.

Caching disabled. Default setting for this page:enabled (code DEF204)
If the display is too slow, you can disable the user mode to view the cached version.

Rechercher dans le manuel MySQL

25.39.24 The INFORMATION_SCHEMA INNODB_TABLES Table

Contents

The INNODB_TABLES table provides metadata about InnoDB tables.

For related usage information and examples, see Section 15.14.3, “InnoDB INFORMATION_SCHEMA Schema Object Tables”.

The INNODB_TABLES table has these columns:

  • TABLE_ID

    An identifier for the InnoDB table. This value is unique across all databases in the instance.

  • NAME

    The name of the table, preceded by the schema (database) name where appropriate (for example, test/t1). Names of databases and user tables are in the same case as they were originally defined, possibly influenced by the lower_case_table_names setting.

  • FLAG

    A numeric value that represents bit-level information about table format and storage characteristics.

  • N_COLS

    The number of columns in the table. The number reported includes three hidden columns that are created by InnoDB (DB_ROW_ID, DB_TRX_ID, and DB_ROLL_PTR). The number reported also includes virtual generated columns, if present.

  • SPACE

    An identifier for the tablespace where the table resides. 0 means the InnoDB system tablespace. Any other number represents either a file-per-table tablespace or a general tablespace. This identifier stays the same after a TRUNCATE TABLE statement. For file-per-table tablespaces, this identifier is unique for tables across all databases in the instance.

  • ROW_FORMAT

    The table's row format (Compact, Redundant, Dynamic, or Compressed).

  • ZIP_PAGE_SIZE

    The zip page size. Applies only to tables with a row format of Compressed.

  • SPACE_TYPE

    The type of tablespace to which the table belongs. Possible values include System for the system tablespace, General for general tablespaces, and Single for file-per-table tablespaces. Tables assigned to the system tablespace using CREATE TABLE or ALTER TABLE TABLESPACE=innodb_system have a SPACE_TYPE of General. For more information, see CREATE TABLESPACE.

  • INSTANT_COLS

    The number of columns in the table prior to adding the first instant column using ALTER TABLE ... ADD COLUMN with ALGORITHM=INSTANT.

Example

  1. mysql> SELECT * FROM INFORMATION_SCHEMA.INNODB_TABLES WHERE TABLE_ID = 214\G
  2. *************************** 1. row ***************************
  3.      TABLE_ID: 214
  4.          NAME: test/t1
  5.          FLAG: 129
  6.        N_COLS: 4
  7.         SPACE: 233
  8.    ROW_FORMAT: Compact
  9. ZIP_PAGE_SIZE: 0
  10.    SPACE_TYPE: General
  11.  INSTANT_COLS: 0

Contents Haut

Notes

  • You must have the PROCESS privilege to query this table.

  • Use the INFORMATION_SCHEMA COLUMNS table or the SHOW COLUMNS statement to view additional information about the columns of this table, including data types and default values.


Find a PHP function

Document created the 26/06/2006, last modified the 26/10/2018
Source of the printed document:https://www.gaudry.be/en/mysql-rf-innodb-tables-table.html/.html

The infobrol is a personal site whose content is my sole responsibility. The text is available under CreativeCommons license (BY-NC-SA). More info on the terms of use and the author.

References

  1. View the html document Language of the document:en Manuel MySQL : https://dev.mysql.com/

These references and links indicate documents consulted during the writing of this page, or which may provide additional information, but the authors of these sources can not be held responsible for the content of this page.
The author This site is solely responsible for the way in which the various concepts, and the freedoms that are taken with the reference works, are presented here. Remember that you must cross multiple source information to reduce the risk of errors.

Contents Haut