Skip to main content
Version: nightly

SCHEMATA

The SCHEMATA table provides information about databases. The table data is equivalent to the result of the SHOW DATABASES statement.

USE INFORMATION_SCHEMA;
DESC SCHEMATA;

The output is as follows:

+----------------------------+--------+------+------+---------+---------------+
| Column | Type | Key | Null | Default | Semantic Type |
+----------------------------+--------+------+------+---------+---------------+
| catalog_name | String | | NO | | FIELD |
| schema_name | String | | NO | | FIELD |
| default_character_set_name | String | | NO | | FIELD |
| default_collation_name | String | | NO | | FIELD |
| sql_path | String | | YES | | FIELD |
| options | String | | YES | | FIELD |
+----------------------------+--------+------+------+---------+---------------+
SELECT * FROM SCHEMATA;
+--------------+--------------------+----------------------------+------------------------+----------+-------------+
| catalog_name | schema_name | default_character_set_name | default_collation_name | sql_path | options |
+--------------+--------------------+----------------------------+------------------------+----------+-------------+
| greptime | greptime_private | utf8 | utf8_bin | NULL | |
| greptime | information_schema | utf8 | utf8_bin | NULL | |
| greptime | public | utf8 | utf8_bin | NULL | |
| greptime | test | utf8 | utf8_bin | NULL | ttl='7days' |
+--------------+--------------------+----------------------------+------------------------+----------+-------------+

Fields in the SCHEMATA table are described as follows:

  • catalog_name: The catalog to which the database belongs.
  • schema_name: The name of the database.
  • default_character_set_name: The default character set of the database.
  • default_collation_name: The default collation of the database.
  • sql_path: The value of this item is always NULL.
  • options: Extending column in GreptimeDB. The database options.