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25.39.28 The INFORMATION_SCHEMA INNODB_TEMP_TABLE_INFO Table
The INNODB_TEMP_TABLE_INFO
table
provides information about user-created InnoDB
temporary tables that are active in an InnoDB
instance. It does not provide information about internal
InnoDB
temporary tables used by the optimizer.
The INNODB_TEMP_TABLE_INFO
table is
created when first queried, exists only in memory, and is not
persisted to disk.
For usage information and examples, see Section 15.14.7, “InnoDB INFORMATION_SCHEMA Temporary Table Info Table”.
The INNODB_TEMP_TABLE_INFO
table has
these columns:
TABLE_ID
The table ID of the temporary table.
NAME
The name of the temporary table.
N_COLS
The number of columns in the temporary table. The number includes three hidden columns created by
InnoDB
(DB_ROW_ID
,DB_TRX_ID
, andDB_ROLL_PTR
).SPACE
The ID of the temporary tablespace where the temporary table resides.
Example
- *************************** 1. row ***************************
- TABLE_ID: 97
- NAME: #sql8c88_43_0
- N_COLS: 4
- SPACE: 76
Notes
This table is useful primarily for expert-level monitoring.
You must have the
PROCESS
privilege to query this table.Use the
INFORMATION_SCHEMA
COLUMNS
table or theSHOW COLUMNS
statement to view additional information about the columns of this table, including data types and default values.
Document created the 26/06/2006, last modified the 26/10/2018
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