Information Schema INNODB_SYS_COLUMNS Table
The Information Schema INNODB_SYS_COLUMNS table contains information about InnoDB fields.
The PROCESS privilege is required to view the table.
It has the following columns:
| Column | Description |
|---|---|
TABLE_ID | Table identifier, matching the value from INNODB_SYS_TABLES.TABLE_ID. |
NAME | Column name. |
POS | Ordinal position of the column in the table, starting from 0. This value is adjusted when columns are added or removed. |
MTYPE | Numeric column type identifier, (see the table below for an explanation of its values). |
PRTYPE | Binary value of the InnoDB precise type, representing the data type, character set code and nullability. |
LEN | Column length. For multi-byte character sets, represents the length in bytes. |
The column MTYPE uses a numeric column type identifier, which has the following values:
| Column Type Identifier | Description |
|---|---|
1 | VARCHAR |
2 | CHAR |
3 | FIXBINARY |
4 | BINARY |
5 | BLOB |
6 | INT |
7 | SYS_CHILD |
8 | SYS |
9 | FLOAT |
10 | DOUBLE |
11 | DECIMAL |
12 | VARMYSQL |
13 | MYSQL |
Example
SELECT * FROM information_schema.INNODB_SYS_COLUMNS LIMIT 3\G
*************************** 1. row ***************************
TABLE_ID: 11
NAME: ID
POS: 0
MTYPE: 1
PRTYPE: 524292
LEN: 0
*************************** 2. row ***************************
TABLE_ID: 11
NAME: FOR_NAME
POS: 0
MTYPE: 1
PRTYPE: 524292
LEN: 0
*************************** 3. row ***************************
TABLE_ID: 11
NAME: REF_NAME
POS: 0
MTYPE: 1
PRTYPE: 524292
LEN: 0
3 rows in set (0.00 sec)
Content reproduced on this site is the property of its respective owners,
and this content is not reviewed in advance by MariaDB. The views, information and opinions
expressed by this content do not necessarily represent those of MariaDB or any other party.
