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SHOW DB_DISCOVERY RULE

Description

The SHOW DB_DISCOVERY RULE syntax is used to query specified database discovery rules for specified database.

Syntax

ShowDatabaseDiscoveryRule::=
  'SHOW' 'DB_DISCOVERY' ('RULE' ruleName | 'RULES') ('FROM' databaseName)?

ruleName ::=
  identifier

databaseName ::=
  identifier

Supplement

  • When databaseName is not specified, the default is the currently used DATABASE. If DATABASE is not used, No database selected will be prompted.

Return value description

Column Description
group_name Database discovery Rule name
data_source_names Data source name list
primary_data_source_name Primary data source name
discovery_type Database discovery service type
discovery_heartbeat Database discovery service heartbeat

Example

  • Query database discovery rules for specified database.
SHOW DB_DISCOVERY RULES FROM discovery_db;

mysql> SHOW DB_DISCOVERY RULES FROM discovery_db;
+------------+-------------------+--------------------------+---------------------------------------------------------------------------------------------------+-----------------------------------------------------------------+
| group_name | data_source_names | primary_data_source_name | discovery_type                                                                                    | discovery_heartbeat                                             |
+------------+-------------------+--------------------------+---------------------------------------------------------------------------------------------------+-----------------------------------------------------------------+
| group_0    | ds_0,ds_1,ds_2    | ds_0                     | {name=group_0_MySQL.MGR, type=MySQL.MGR, props={group-name=558edd3c-02ec-11ea-9bb3-080027e39bd2}} | {name=group_0_heartbeat, props={keep-alive-cron=0/5 * * * * ?}} |
+------------+-------------------+--------------------------+---------------------------------------------------------------------------------------------------+-----------------------------------------------------------------+
1 row in set (0.01 sec)
  • Query database discovery rules for current database.
SHOW DB_DISCOVERY RULES;

mysql> SHOW DB_DISCOVERY RULES;
+------------+-------------------+--------------------------+---------------------------------------------------------------------------------------------------+-----------------------------------------------------------------+
| group_name | data_source_names | primary_data_source_name | discovery_type                                                                                    | discovery_heartbeat                                             |
+------------+-------------------+--------------------------+---------------------------------------------------------------------------------------------------+-----------------------------------------------------------------+
| group_0    | ds_0,ds_1,ds_2    | ds_0                     | {name=group_0_MySQL.MGR, type=MySQL.MGR, props={group-name=558edd3c-02ec-11ea-9bb3-080027e39bd2}} | {name=group_0_heartbeat, props={keep-alive-cron=0/5 * * * * ?}} |
+------------+-------------------+--------------------------+---------------------------------------------------------------------------------------------------+-----------------------------------------------------------------+
1 row in set (0.03 sec)
  • Query specified database discovery rule for specified database.
SHOW DB_DISCOVERY RULE group_0 FROM discovery_db;

mysql> SHOW DB_DISCOVERY RULE group_0 FROM discovery_db;
+------------+-------------------+--------------------------+---------------------------------------------------------------------------------------------------+-----------------------------------------------------------------+
| group_name | data_source_names | primary_data_source_name | discovery_type                                                                                    | discovery_heartbeat                                             |
+------------+-------------------+--------------------------+---------------------------------------------------------------------------------------------------+-----------------------------------------------------------------+
| group_0    | ds_0,ds_1,ds_2    | ds_0                     | {name=group_0_MySQL.MGR, type=MySQL.MGR, props={group-name=558edd3c-02ec-11ea-9bb3-080027e39bd2}} | {name=group_0_heartbeat, props={keep-alive-cron=0/5 * * * * ?}} |
+------------+-------------------+--------------------------+---------------------------------------------------------------------------------------------------+-----------------------------------------------------------------+
1 row in set (0.01 sec)
  • Query specified database discovery rule for current database.
SHOW DB_DISCOVERY RULE group_0;

mysql> SHOW DB_DISCOVERY RULE group_0;
+------------+-------------------+--------------------------+---------------------------------------------------------------------------------------------------+-----------------------------------------------------------------+
| group_name | data_source_names | primary_data_source_name | discovery_type                                                                                    | discovery_heartbeat                                             |
+------------+-------------------+--------------------------+---------------------------------------------------------------------------------------------------+-----------------------------------------------------------------+
| group_0    | ds_0,ds_1,ds_2    | ds_0                     | {name=group_0_MySQL.MGR, type=MySQL.MGR, props={group-name=558edd3c-02ec-11ea-9bb3-080027e39bd2}} | {name=group_0_heartbeat, props={keep-alive-cron=0/5 * * * * ?}} |
+------------+-------------------+--------------------------+---------------------------------------------------------------------------------------------------+-----------------------------------------------------------------+
1 row in set (0.03 sec)

Reserved word

SHOW, DB_DISCOVERY, RULE, RULES, FROM