21.30.23 The INFORMATION_SCHEMA INNODB_SYS_TABLESPACES Table

The INNODB_SYS_TABLESPACES table provides metadata about InnoDB tablespaces, equivalent to the information in the SYS_TABLESPACES table in the InnoDB data dictionary.

For related usage information and examples, see Section 14.15.3, “InnoDB INFORMATION_SCHEMA System Tables”.

The INNODB_SYS_TABLESPACES table has these columns:

• SPACE

  The tablespace ID.

• NAME

  The schema (database) and table name.

• FLAG

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

• FILE_FORMAT

  The tablespace file format (for example, Antelope or Barracuda). The data in this field is interpreted from the tablespace flags information that resides in the .ibd file. For more information about InnoDB file formats, see Section 14.10, “InnoDB File-Format Management”.

• ROW_FORMAT

  The tablespace row format (Compact or Redundant, Dynamic, or Compressed). The data in this column is interpreted from the tablespace flags information that resides in the .ibd file.

• PAGE_SIZE

  The tablespace page size. The data in this column is interpreted from the tablespace flags information that resides in the .ibd file.

• ZIP_PAGE_SIZE

  The tablespace zip page size. The data in this column is interpreted from the tablespace flags information that resides in the .ibd file.

Example

mysql> SELECT * FROM INFORMATION_SCHEMA.INNODB_SYS_TABLESPACES WHERE SPACE = 57\G
*************************** 1. row ***************************
        SPACE: 57
         NAME: test/t1
         FLAG: 0
  FILE_FORMAT: Antelope
   ROW_FORMAT: Compact or Redundant
    PAGE_SIZE: 16384
ZIP_PAGE_SIZE: 0

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.

• Because tablespace flags are always zero for all Antelope file formats (unlike table flags), there is no way to determine from this flag integer if the tablespace row format is Redundant or Compact. As a result, the possible values for the ROW_FORMAT field are “Compact or Redundant”, “Compressed”, or “Dynamic.”