The COUNT BROADCAST RULE
syntax is used to query the number of broadcast table rules for specified database.
CountBroadcastRule::=
'COUNT' 'BROADCAST' 'RULE' ('FROM' databaseName)?
databaseName ::=
identifier
databaseName
is not specified, the default is the currently used DATABASE
. If DATABASE
is not used, No database selected
will be prompted.Column | Description |
---|---|
rule_name | rule type |
database | the database to which the rule belongs |
count | the number of the rule |
COUNT BROADCAST RULE FROM sharding_db;
mysql> COUNT BROADCAST RULE FROM sharding_db;
+--------------------------+----------------+-------+
| rule_name | database | count |
+--------------------------+----------------+-------+
| broadcast_table | sharding_db | 0 |
+--------------------------+----------------+-------+
1 rows in set (0.00 sec)
COUNT BROADCAST RULE;
mysql> COUNT BROADCAST RULE;
+--------------------------+----------------+-------+
| rule_name | database | count |
+--------------------------+----------------+-------+
| broadcast_table | sharding_db | 0 |
+--------------------------+----------------+-------+
1 rows in set (0.00 sec)
COUNT
, BROADCAST
, RULE
, FROM