[GitHub] [shardingsphere] 448700174 commented on issue #12315: left join result in cross table merge

[GitBox <gi...@apache.org>]

448700174 commented on issue #12315:
URL: https://github.com/apache/shardingsphere/issues/12315#issuecomment-915997997


   the actual sql is :
   select i.id,i.operate_time,i.operator_name,group_concat("{\"k\":\"",d.option_name,"\",\"v\":\"",d.option_value, "\"}") options 
   		from care_task_12 t,care_task_item_12 i left join care_task_detail_21 d on d.task_item_id = i.id and d.tenant_id = ?
   		where i.task_id = t.id and t.enabled = 1 and t.done_count > 0 and i.enabled  = 1
   		and t.tenant_id = ?
   		and i.tenant_id = ?
   
   select i.id,i.operate_time,i.operator_name,group_concat("{\"k\":\"",d.option_name,"\",\"v\":\"",d.option_value, "\"}") options 
   		from care_task_12 t,care_task_item_12 i left join care_task_detail_22 d on d.task_item_id = i.id and d.tenant_id = ?
   		where i.task_id = t.id and t.enabled = 1 and t.done_count > 0 and i.enabled  = 1
   		and t.tenant_id = ?
   		and i.tenant_id = ?
   
   ...


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