ALTER DEFAULT SINGLE TABLE RULE 语法用于修改默认的单表规则
AlterDefaultSingleTableRule ::=
'ALTER' 'DEFAULT' 'SINGLE' 'TABLE' 'RULE' singleTableDefinition
singleTableDefinition ::=
'RESOURCE' '=' resourceName
resourceName ::=
identifier
RESOURCE 需使用 RDL 管理的数据源资源。ALTER DEFAULT SINGLE TABLE RULE RESOURCE = ds_0;
ALTER、SHARDING、SINGLE、TABLE、RULE、RESOURCE
