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SHOW DATABASES
Shows the list of databases that exist on this MemSQL instance.
Syntax
SHOW DATABASES [EXTENDED]
[LIKE 'pattern']
Remarks
- The
EXTENDEDsuffix is a MemSQL-only extension that displays extra information about each database. - This command must be run on the master aggregator or a child aggregator node (see Node Requirements for MemSQL Commands).
Output (EXTENDED option)
| Column | Description |
|---|---|
Database |
Name of a database in the MemSQL instance |
Commits |
Number of committed transactions |
Role |
Database replication role |
State |
Current state (Database States) |
Position |
Current position in the transaction log, formatted as <LogFileId>:<ByteOffsetInLogFile> |
Details |
Optional message about the current state |
AsyncSlaves |
Number of currently attached asynchronous replicas |
SyncSlaves |
Number of currently attached synchronous replicas |
Examples
memsql> SHOW DATABASES;
+--------------------+
| Database |
+--------------------+
| information_schema |
| memsql |
| test |
+--------------------+
3 rows in set (0.00 sec)
memsql> SHOW DATABASES EXTENDED;
+--------------------+---------+-------------+---------------------+----------+-------------------------+-------------+------------+
| Database | Commits | Role | State | Position | Details | AsyncSlaves | SyncSlaves |
+--------------------+---------+-------------+---------------------+----------+-------------------------+-------------+------------+
| information_schema | NULL | NULL | NULL | NULL | NULL | NULL | NULL |
| memsql | 3 | master | online | 0:183 | NULL | 0 | 0 |
| foo | 112 | master | online | 1:202 | NULL | 1 | 0 |
| bar | NULL | master | recovering snapshot | 2:89123 | Recovery progress 17.2% | 0 | 1 |
| example_slave | 37 | async slave | replicating | 0:8870 | NULL | 0 | 0 |
+--------------------+---------+-------------+---------------------+----------+-------------------------+-------------+------------+
