The COUNT READWRITE_SPLITTING RULE syntax is used to query the number of readwrite splitting rules for specified database.
CountReadwriteSplittingRule::=
'COUNT' 'READWRITE_SPLITTING' '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 READWRITE_SPLITTING RULE FROM readwrite_splitting_db;
mysql> COUNT READWRITE_SPLITTING RULE FROM readwrite_splitting_db;
+---------------------+---------------------------+-------+
| rule_name | database | count |
+---------------------+---------------------------+-------+
| readwrite_splitting | readwrite_splitting_db | 1 |
+---------------------+---------------------------+-------+
1 row in set (0.02 sec)
COUNT READWRITE_SPLITTING RULE;
mysql> COUNT READWRITE_SPLITTING RULE;
+---------------------+---------------------------+-------+
| rule_name | database | count |
+---------------------+---------------------------+-------+
| readwrite_splitting | readwrite_splitting_db | 1 |
+---------------------+---------------------------+-------+
1 row in set (0.00 sec)
COUNT, READWRITE_SPLITTING, RULE, FROM