# Information Schema INNODB\_SYS\_TABLES Table
The [Information Schema](/docs/server/reference/system-tables/information-schema.md) `INNODB_SYS_TABLES` table contains information about InnoDB tables.
The `PROCESS` [privilege](/docs/server/reference/sql-statements/account-management-sql-statements/grant.md) is required to view the table.
It has the following columns:
| Field | Type | Null | Default | Description |
| --------------- | ---------------------------------------------------------------------------------------------------- | ---- | ------- | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
| TABLE\_ID | bigint(21) unsigned | NO | 0 | Unique InnoDB table identifier. |
| NAME | varchar(655) | NO | | Database and table name, or the uppercase InnoDB system table name. |
| FLAG | int(11) | NO | 0 | See [Flag](#flag) below |
| N\_COLS | int(11) unsigned (>= MariaDB 10.5) int(11) (<= MariaDB 10.4) | NO | 0 | Number of columns in the table. The count includes two or three hidden InnoDB system columns, appended to the end of the column list: DB\_ROW\_ID (if there is no primary key or unique index on NOT NULL columns), DB\_TRX\_ID, DB\_ROLL\_PTR. |
| SPACE | int(11) unsigned (>= MariaDB 10.5) int(11) (<= MariaDB 10.4) | NO | 0 | Tablespace identifier where the index resides. 0 represents the InnoDB system tablespace, while any other value represents a table created in file-per-table mode (see the [innodb\_file\_per\_table](/docs/server/server-usage/storage-engines/innodb/innodb-system-variables.md#innodb_file_per_table) system variable). Remains unchanged after a [TRUNCATE TABLE](/docs/server/reference/sql-statements/table-statements/truncate-table.md) statement. |
| FILE\_FORMAT | varchar(10) | YES | NULL | [InnoDB file format](/docs/server/server-usage/storage-engines/innodb/innodb-file-format.md) (Antelope or Barracuda). |
| ROW\_FORMAT | enum('Redundant', 'Compact', 'Compressed', 'Dynamic') (>= MariaDB 10.5)varchar(12) (<= MariaDB 10.4) | YES | NULL | [InnoDB storage format](/docs/server/server-usage/storage-engines/innodb/innodb-row-formats/innodb-row-formats-overview.md) (Compact, Redundant, Dynamic, or Compressed). |
| ZIP\_PAGE\_SIZE | int(11) unsigned | NO | 0 | For Compressed tables, the zipped page size. |
| SPACE\_TYPE | enum('Single','System') (>= MariaDB 10.5)varchar(10) (<= MariaDB 10.4) | YES | NULL | |
## Flag
The flag field returns the dict\_table\_t::flags that correspond to the data dictionary record.
| Bit | Description |
| ------- | ---------------------------------------------------------------------------------------------------------------- |
| 0 | Set if ROW\_FORMAT is not REDUNDANT. |
| 1 to 4 | 0, except for ROW\_FORMAT=COMPRESSED, where they will determine the KEY\_BLOCK\_SIZE (the compressed page size). |
| 5 | Set for ROW\_FORMAT=DYNAMIC or ROW\_FORMAT=COMPRESSED. |
| 6 | Set if the DATA DIRECTORY attribute was present when the table was originally created. |
| 7 | Set if the page\_compressed attribute is present. |
| 8 to 11 | Determine the page\_compression\_level. |
| 12 13 | Normally `00`, but `11` for "no-rollback tables". |
Note that the table flags returned here are not the same as tablespace flags (FSP\_SPACE\_FLAGS).
## Example
```sql
SELECT * FROM information_schema.INNODB_SYS_TABLES LIMIT 2\G
*************************** 1. row ***************************
TABLE_ID: 14
NAME: SYS_DATAFILES
FLAG: 0
N_COLS: 5
SPACE: 0
ROW_FORMAT: Redundant
ZIP_PAGE_SIZE: 0
SPACE_TYPE: System
*************************** 2. row ***************************
TABLE_ID: 11
NAME: SYS_FOREIGN
FLAG: 0
N_COLS: 7
SPACE: 0
ROW_FORMAT: Redundant
ZIP_PAGE_SIZE: 0
SPACE_TYPE: System
2 rows in set (0.00 sec)
```
## See Also
* [InnoDB Data Dictionary Troubleshooting](/docs/server/server-usage/storage-engines/innodb/innodb-troubleshooting/innodb-data-dictionary-troubleshooting.md)
*This page is licensed: CC BY-SA / Gnu FDL*
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