Discussion on '_query_plan' as if there is no return value for empty tables and be clusters

[aoyuEra]

I encountered an error when accessing the Doris empty table using Spark Doris Connector, and found that it was a query table execution plan error. Later testing found that the "_query_plan" API returned the same error when querying empty tables and Doris be clusters after they all failed. This makes it difficult to distinguish whether the table has no values or if there is a problem with be?

POST http://FE_IP:HTTP_PORT/api/db_test/test_table/_query_plan
{"sql": "select * from db_test.test_table;"}

{
	"msg": "success",
	"code": 0,
	"data": {
		"exception": "only support single table filter-prune-scan, but found [ select * from db_test.test_table]",
		"status": 400
	},
	"count": 0
}