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			712 lines
		
	
	
	
		
			23 KiB
		
	
	
	
		
			Text
		
	
	
	
	
	
			
		
		
	
	
			712 lines
		
	
	
	
		
			23 KiB
		
	
	
	
		
			Text
		
	
	
	
	
	
set @@join_buffer_size=256*1024;
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create table t1 (a int, b int) engine=MyISAM;
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create table t2 (c int, d int) engine=MyISAM;
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insert into t1 values (1,1),(2,2);
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insert into t2 values (2,2),(3,3);
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(select a,b from t1) except (select c,d from t2);
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a	b
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1	1
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EXPLAIN (select a,b from t1) except (select c,d from t2);
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id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
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1	PRIMARY	t1	ALL	NULL	NULL	NULL	NULL	2	
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2	EXCEPT	t2	ALL	NULL	NULL	NULL	NULL	2	
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NULL	EXCEPT RESULT	<except1,2>	ALL	NULL	NULL	NULL	NULL	NULL	
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EXPLAIN extended (select a,b from t1) except (select c,d from t2);
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id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
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1	PRIMARY	t1	ALL	NULL	NULL	NULL	NULL	2	100.00	
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2	EXCEPT	t2	ALL	NULL	NULL	NULL	NULL	2	100.00	
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NULL	EXCEPT RESULT	<except1,2>	ALL	NULL	NULL	NULL	NULL	NULL	NULL	
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Warnings:
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Note	1003	(/* select#1 */ select `test`.`t1`.`a` AS `a`,`test`.`t1`.`b` AS `b` from `test`.`t1`) except (/* select#2 */ select `test`.`t2`.`c` AS `c`,`test`.`t2`.`d` AS `d` from `test`.`t2`)
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EXPLAIN extended select * from ((select a,b from t1) except (select c,d from t2)) a;
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id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
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1	PRIMARY	<derived2>	ALL	NULL	NULL	NULL	NULL	2	100.00	
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2	DERIVED	t1	ALL	NULL	NULL	NULL	NULL	2	100.00	
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3	EXCEPT	t2	ALL	NULL	NULL	NULL	NULL	2	100.00	
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NULL	EXCEPT RESULT	<except2,3>	ALL	NULL	NULL	NULL	NULL	NULL	NULL	
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Warnings:
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Note	1003	/* select#1 */ select `a`.`a` AS `a`,`a`.`b` AS `b` from ((/* select#2 */ select `test`.`t1`.`a` AS `a`,`test`.`t1`.`b` AS `b` from `test`.`t1`) except (/* select#3 */ select `test`.`t2`.`c` AS `c`,`test`.`t2`.`d` AS `d` from `test`.`t2`)) `a`
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EXPLAIN format=json (select a,b from t1) except (select c,d from t2);
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EXPLAIN
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{
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  "query_block": {
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    "union_result": {
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      "table_name": "<except1,2>",
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      "access_type": "ALL",
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      "query_specifications": [
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        {
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          "query_block": {
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            "select_id": 1,
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            "cost": "REPLACED",
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            "nested_loop": [
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              {
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                "table": {
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                  "table_name": "t1",
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                  "access_type": "ALL",
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                  "loops": 1,
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                  "rows": 2,
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                  "cost": "REPLACED",
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                  "filtered": 100
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                }
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              }
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            ]
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          }
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        },
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        {
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          "query_block": {
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            "select_id": 2,
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            "operation": "EXCEPT",
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            "cost": "REPLACED",
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            "nested_loop": [
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              {
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                "table": {
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                  "table_name": "t2",
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                  "access_type": "ALL",
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                  "loops": 1,
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                  "rows": 2,
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                  "cost": "REPLACED",
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                  "filtered": 100
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                }
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              }
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            ]
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          }
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        }
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      ]
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    }
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  }
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}
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ANALYZE format=json (select a,b from t1) except (select c,d from t2);
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ANALYZE
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{
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  "query_optimization": {
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    "r_total_time_ms": "REPLACED"
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  },
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  "query_block": {
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    "union_result": {
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      "table_name": "<except1,2>",
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      "access_type": "ALL",
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      "r_loops": 1,
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      "r_rows": 1,
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      "query_specifications": [
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        {
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          "query_block": {
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            "select_id": 1,
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            "cost": "REPLACED",
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            "r_loops": 1,
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            "r_total_time_ms": "REPLACED",
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            "nested_loop": [
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              {
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                "table": {
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                  "table_name": "t1",
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                  "access_type": "ALL",
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                  "loops": 1,
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                  "r_loops": 1,
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                  "rows": 2,
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                  "r_rows": 2,
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                  "cost": "REPLACED",
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                  "r_table_time_ms": "REPLACED",
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                  "r_other_time_ms": "REPLACED",
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                  "r_engine_stats": REPLACED,
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                  "filtered": 100,
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                  "r_filtered": 100
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                }
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              }
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            ]
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          }
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        },
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        {
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          "query_block": {
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            "select_id": 2,
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            "operation": "EXCEPT",
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            "cost": "REPLACED",
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            "r_loops": 1,
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            "r_total_time_ms": "REPLACED",
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            "nested_loop": [
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              {
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                "table": {
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                  "table_name": "t2",
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                  "access_type": "ALL",
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                  "loops": 1,
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                  "r_loops": 1,
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                  "rows": 2,
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                  "r_rows": 2,
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                  "cost": "REPLACED",
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                  "r_table_time_ms": "REPLACED",
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                  "r_other_time_ms": "REPLACED",
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                  "r_engine_stats": REPLACED,
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                  "filtered": 100,
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                  "r_filtered": 100
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                }
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              }
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            ]
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          }
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        }
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      ]
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    }
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  }
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}
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ANALYZE format=json select * from ((select a,b from t1) except (select c,d from t2)) a;
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ANALYZE
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{
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  "query_optimization": {
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    "r_total_time_ms": "REPLACED"
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  },
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  "query_block": {
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    "select_id": 1,
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    "cost": "REPLACED",
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    "r_loops": 1,
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    "r_total_time_ms": "REPLACED",
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    "nested_loop": [
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      {
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        "table": {
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          "table_name": "<derived2>",
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          "access_type": "ALL",
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          "loops": 1,
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          "r_loops": 1,
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          "rows": 2,
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          "r_rows": 1,
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          "cost": "REPLACED",
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          "r_table_time_ms": "REPLACED",
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          "r_other_time_ms": "REPLACED",
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          "filtered": 100,
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          "r_filtered": 100,
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          "materialized": {
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            "query_block": {
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              "union_result": {
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                "table_name": "<except2,3>",
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                "access_type": "ALL",
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                "r_loops": 1,
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                "r_rows": 1,
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                "query_specifications": [
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                  {
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                    "query_block": {
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                      "select_id": 2,
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                      "cost": "REPLACED",
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                      "r_loops": 1,
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                      "r_total_time_ms": "REPLACED",
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                      "nested_loop": [
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                        {
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                          "table": {
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                            "table_name": "t1",
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                            "access_type": "ALL",
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                            "loops": 1,
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                            "r_loops": 1,
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                            "rows": 2,
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                            "r_rows": 2,
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                            "cost": "REPLACED",
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                            "r_table_time_ms": "REPLACED",
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                            "r_other_time_ms": "REPLACED",
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                            "r_engine_stats": REPLACED,
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                            "filtered": 100,
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                            "r_filtered": 100
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                          }
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                        }
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                      ]
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                    }
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                  },
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                  {
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                    "query_block": {
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                      "select_id": 3,
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                      "operation": "EXCEPT",
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                      "cost": "REPLACED",
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                      "r_loops": 1,
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                      "r_total_time_ms": "REPLACED",
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                      "nested_loop": [
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                        {
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                          "table": {
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                            "table_name": "t2",
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                            "access_type": "ALL",
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                            "loops": 1,
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                            "r_loops": 1,
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                            "rows": 2,
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                            "r_rows": 2,
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                            "cost": "REPLACED",
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                            "r_table_time_ms": "REPLACED",
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                            "r_other_time_ms": "REPLACED",
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                            "r_engine_stats": REPLACED,
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                            "filtered": 100,
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                            "r_filtered": 100
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                          }
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                        }
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                      ]
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                    }
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                  }
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                ]
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              }
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            }
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          }
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        }
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      }
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    ]
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  }
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}
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select * from ((select a,b from t1) except (select c,d from t2)) a;
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a	b
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1	1
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prepare stmt from "(select a,b from t1) except (select c,d from t2)";
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execute stmt;
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a	b
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1	1
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execute stmt;
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a	b
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1	1
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prepare stmt from "select * from ((select a,b from t1) except (select c,d from t2)) a";
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execute stmt;
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a	b
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1	1
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execute stmt;
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a	b
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1	1
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drop tables t1,t2;
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create table t1 (a int, b int) engine=MyISAM;
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create table t2 (c int, d int) engine=MyISAM;
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create table t3 (e int, f int) engine=MyISAM;
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create table t4 (g int, h int) engine=MyISAM;
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insert into t1 values (1,1),(2,2);
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insert into t2 values (2,2),(3,3);
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insert into t3 values (4,4),(5,5);
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insert into t4 values (4,4),(7,7);
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(select a,b,e,f from t1,t3) except (select c,d,g,h from t2,t4);
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a	b	e	f
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1	1	4	4
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1	1	5	5
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2	2	5	5
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EXPLAIN (select a,b,e,f from t1,t3) except (select c,d,g,h from t2,t4);
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id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
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1	PRIMARY	t1	ALL	NULL	NULL	NULL	NULL	2	
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1	PRIMARY	t3	ALL	NULL	NULL	NULL	NULL	2	Using join buffer (flat, BNL join)
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2	EXCEPT	t2	ALL	NULL	NULL	NULL	NULL	2	
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2	EXCEPT	t4	ALL	NULL	NULL	NULL	NULL	2	Using join buffer (flat, BNL join)
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NULL	EXCEPT RESULT	<except1,2>	ALL	NULL	NULL	NULL	NULL	NULL	
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EXPLAIN (select a,b,e,f from t1,t3) except (select c,d,g,h from t2,t4);
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id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
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1	PRIMARY	t1	ALL	NULL	NULL	NULL	NULL	2	
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1	PRIMARY	t3	ALL	NULL	NULL	NULL	NULL	2	Using join buffer (flat, BNL join)
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2	EXCEPT	t2	ALL	NULL	NULL	NULL	NULL	2	
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2	EXCEPT	t4	ALL	NULL	NULL	NULL	NULL	2	Using join buffer (flat, BNL join)
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NULL	EXCEPT RESULT	<except1,2>	ALL	NULL	NULL	NULL	NULL	NULL	
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EXPLAIN extended select * from ((select a,b,e,f from t1,t3) except (select c,d,g,h from t2,t4)) a;
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id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
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1	PRIMARY	<derived2>	ALL	NULL	NULL	NULL	NULL	4	100.00	
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2	DERIVED	t1	ALL	NULL	NULL	NULL	NULL	2	100.00	
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2	DERIVED	t3	ALL	NULL	NULL	NULL	NULL	2	100.00	Using join buffer (flat, BNL join)
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3	EXCEPT	t2	ALL	NULL	NULL	NULL	NULL	2	100.00	
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3	EXCEPT	t4	ALL	NULL	NULL	NULL	NULL	2	100.00	Using join buffer (flat, BNL join)
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NULL	EXCEPT RESULT	<except2,3>	ALL	NULL	NULL	NULL	NULL	NULL	NULL	
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Warnings:
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Note	1003	/* select#1 */ select `a`.`a` AS `a`,`a`.`b` AS `b`,`a`.`e` AS `e`,`a`.`f` AS `f` from ((/* select#2 */ select `test`.`t1`.`a` AS `a`,`test`.`t1`.`b` AS `b`,`test`.`t3`.`e` AS `e`,`test`.`t3`.`f` AS `f` from `test`.`t1` join `test`.`t3`) except (/* select#3 */ select `test`.`t2`.`c` AS `c`,`test`.`t2`.`d` AS `d`,`test`.`t4`.`g` AS `g`,`test`.`t4`.`h` AS `h` from `test`.`t2` join `test`.`t4`)) `a`
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EXPLAIN format=json (select a,b,e,f from t1,t3) except (select c,d,g,h from t2,t4);
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EXPLAIN
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{
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  "query_block": {
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    "union_result": {
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      "table_name": "<except1,2>",
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      "access_type": "ALL",
 | 
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      "query_specifications": [
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        {
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          "query_block": {
 | 
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            "select_id": 1,
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            "cost": "REPLACED",
 | 
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            "nested_loop": [
 | 
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              {
 | 
						|
                "table": {
 | 
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                  "table_name": "t1",
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                  "access_type": "ALL",
 | 
						|
                  "loops": 1,
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						|
                  "rows": 2,
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						|
                  "cost": "REPLACED",
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                  "filtered": 100
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                }
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              },
 | 
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              {
 | 
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                "block-nl-join": {
 | 
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                  "table": {
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                    "table_name": "t3",
 | 
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                    "access_type": "ALL",
 | 
						|
                    "loops": 2,
 | 
						|
                    "rows": 2,
 | 
						|
                    "cost": "REPLACED",
 | 
						|
                    "filtered": 100
 | 
						|
                  },
 | 
						|
                  "buffer_type": "flat",
 | 
						|
                  "buffer_size": "119",
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						|
                  "join_type": "BNL"
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						|
                }
 | 
						|
              }
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						|
            ]
 | 
						|
          }
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						|
        },
 | 
						|
        {
 | 
						|
          "query_block": {
 | 
						|
            "select_id": 2,
 | 
						|
            "operation": "EXCEPT",
 | 
						|
            "cost": "REPLACED",
 | 
						|
            "nested_loop": [
 | 
						|
              {
 | 
						|
                "table": {
 | 
						|
                  "table_name": "t2",
 | 
						|
                  "access_type": "ALL",
 | 
						|
                  "loops": 1,
 | 
						|
                  "rows": 2,
 | 
						|
                  "cost": "REPLACED",
 | 
						|
                  "filtered": 100
 | 
						|
                }
 | 
						|
              },
 | 
						|
              {
 | 
						|
                "block-nl-join": {
 | 
						|
                  "table": {
 | 
						|
                    "table_name": "t4",
 | 
						|
                    "access_type": "ALL",
 | 
						|
                    "loops": 2,
 | 
						|
                    "rows": 2,
 | 
						|
                    "cost": "REPLACED",
 | 
						|
                    "filtered": 100
 | 
						|
                  },
 | 
						|
                  "buffer_type": "flat",
 | 
						|
                  "buffer_size": "119",
 | 
						|
                  "join_type": "BNL"
 | 
						|
                }
 | 
						|
              }
 | 
						|
            ]
 | 
						|
          }
 | 
						|
        }
 | 
						|
      ]
 | 
						|
    }
 | 
						|
  }
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}
 | 
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ANALYZE format=json (select a,b,e,f from t1,t3) except (select c,d,g,h from t2,t4);
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ANALYZE
 | 
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{
 | 
						|
  "query_optimization": {
 | 
						|
    "r_total_time_ms": "REPLACED"
 | 
						|
  },
 | 
						|
  "query_block": {
 | 
						|
    "union_result": {
 | 
						|
      "table_name": "<except1,2>",
 | 
						|
      "access_type": "ALL",
 | 
						|
      "r_loops": 1,
 | 
						|
      "r_rows": 3,
 | 
						|
      "query_specifications": [
 | 
						|
        {
 | 
						|
          "query_block": {
 | 
						|
            "select_id": 1,
 | 
						|
            "cost": "REPLACED",
 | 
						|
            "r_loops": 1,
 | 
						|
            "r_total_time_ms": "REPLACED",
 | 
						|
            "nested_loop": [
 | 
						|
              {
 | 
						|
                "table": {
 | 
						|
                  "table_name": "t1",
 | 
						|
                  "access_type": "ALL",
 | 
						|
                  "loops": 1,
 | 
						|
                  "r_loops": 1,
 | 
						|
                  "rows": 2,
 | 
						|
                  "r_rows": 2,
 | 
						|
                  "cost": "REPLACED",
 | 
						|
                  "r_table_time_ms": "REPLACED",
 | 
						|
                  "r_other_time_ms": "REPLACED",
 | 
						|
                  "r_engine_stats": REPLACED,
 | 
						|
                  "filtered": 100,
 | 
						|
                  "r_filtered": 100
 | 
						|
                }
 | 
						|
              },
 | 
						|
              {
 | 
						|
                "block-nl-join": {
 | 
						|
                  "table": {
 | 
						|
                    "table_name": "t3",
 | 
						|
                    "access_type": "ALL",
 | 
						|
                    "loops": 2,
 | 
						|
                    "r_loops": 1,
 | 
						|
                    "rows": 2,
 | 
						|
                    "r_rows": 2,
 | 
						|
                    "cost": "REPLACED",
 | 
						|
                    "r_table_time_ms": "REPLACED",
 | 
						|
                    "r_other_time_ms": "REPLACED",
 | 
						|
                    "r_engine_stats": REPLACED,
 | 
						|
                    "filtered": 100,
 | 
						|
                    "r_filtered": 100
 | 
						|
                  },
 | 
						|
                  "buffer_type": "flat",
 | 
						|
                  "buffer_size": "119",
 | 
						|
                  "join_type": "BNL",
 | 
						|
                  "r_loops": 2,
 | 
						|
                  "r_filtered": 100,
 | 
						|
                  "r_unpack_time_ms": "REPLACED",
 | 
						|
                  "r_other_time_ms": "REPLACED",
 | 
						|
                  "r_effective_rows": 2
 | 
						|
                }
 | 
						|
              }
 | 
						|
            ]
 | 
						|
          }
 | 
						|
        },
 | 
						|
        {
 | 
						|
          "query_block": {
 | 
						|
            "select_id": 2,
 | 
						|
            "operation": "EXCEPT",
 | 
						|
            "cost": "REPLACED",
 | 
						|
            "r_loops": 1,
 | 
						|
            "r_total_time_ms": "REPLACED",
 | 
						|
            "nested_loop": [
 | 
						|
              {
 | 
						|
                "table": {
 | 
						|
                  "table_name": "t2",
 | 
						|
                  "access_type": "ALL",
 | 
						|
                  "loops": 1,
 | 
						|
                  "r_loops": 1,
 | 
						|
                  "rows": 2,
 | 
						|
                  "r_rows": 2,
 | 
						|
                  "cost": "REPLACED",
 | 
						|
                  "r_table_time_ms": "REPLACED",
 | 
						|
                  "r_other_time_ms": "REPLACED",
 | 
						|
                  "r_engine_stats": REPLACED,
 | 
						|
                  "filtered": 100,
 | 
						|
                  "r_filtered": 100
 | 
						|
                }
 | 
						|
              },
 | 
						|
              {
 | 
						|
                "block-nl-join": {
 | 
						|
                  "table": {
 | 
						|
                    "table_name": "t4",
 | 
						|
                    "access_type": "ALL",
 | 
						|
                    "loops": 2,
 | 
						|
                    "r_loops": 1,
 | 
						|
                    "rows": 2,
 | 
						|
                    "r_rows": 2,
 | 
						|
                    "cost": "REPLACED",
 | 
						|
                    "r_table_time_ms": "REPLACED",
 | 
						|
                    "r_other_time_ms": "REPLACED",
 | 
						|
                    "r_engine_stats": REPLACED,
 | 
						|
                    "filtered": 100,
 | 
						|
                    "r_filtered": 100
 | 
						|
                  },
 | 
						|
                  "buffer_type": "flat",
 | 
						|
                  "buffer_size": "119",
 | 
						|
                  "join_type": "BNL",
 | 
						|
                  "r_loops": 2,
 | 
						|
                  "r_filtered": 100,
 | 
						|
                  "r_unpack_time_ms": "REPLACED",
 | 
						|
                  "r_other_time_ms": "REPLACED",
 | 
						|
                  "r_effective_rows": 2
 | 
						|
                }
 | 
						|
              }
 | 
						|
            ]
 | 
						|
          }
 | 
						|
        }
 | 
						|
      ]
 | 
						|
    }
 | 
						|
  }
 | 
						|
}
 | 
						|
ANALYZE format=json select * from ((select a,b,e,f from t1,t3) except
 | 
						|
(select c,d,g,h from t2,t4)) a;
 | 
						|
ANALYZE
 | 
						|
{
 | 
						|
  "query_optimization": {
 | 
						|
    "r_total_time_ms": "REPLACED"
 | 
						|
  },
 | 
						|
  "query_block": {
 | 
						|
    "select_id": 1,
 | 
						|
    "cost": "REPLACED",
 | 
						|
    "r_loops": 1,
 | 
						|
    "r_total_time_ms": "REPLACED",
 | 
						|
    "nested_loop": [
 | 
						|
      {
 | 
						|
        "table": {
 | 
						|
          "table_name": "<derived2>",
 | 
						|
          "access_type": "ALL",
 | 
						|
          "loops": 1,
 | 
						|
          "r_loops": 1,
 | 
						|
          "rows": 4,
 | 
						|
          "r_rows": 3,
 | 
						|
          "cost": "REPLACED",
 | 
						|
          "r_table_time_ms": "REPLACED",
 | 
						|
          "r_other_time_ms": "REPLACED",
 | 
						|
          "filtered": 100,
 | 
						|
          "r_filtered": 100,
 | 
						|
          "materialized": {
 | 
						|
            "query_block": {
 | 
						|
              "union_result": {
 | 
						|
                "table_name": "<except2,3>",
 | 
						|
                "access_type": "ALL",
 | 
						|
                "r_loops": 1,
 | 
						|
                "r_rows": 3,
 | 
						|
                "query_specifications": [
 | 
						|
                  {
 | 
						|
                    "query_block": {
 | 
						|
                      "select_id": 2,
 | 
						|
                      "cost": "REPLACED",
 | 
						|
                      "r_loops": 1,
 | 
						|
                      "r_total_time_ms": "REPLACED",
 | 
						|
                      "nested_loop": [
 | 
						|
                        {
 | 
						|
                          "table": {
 | 
						|
                            "table_name": "t1",
 | 
						|
                            "access_type": "ALL",
 | 
						|
                            "loops": 1,
 | 
						|
                            "r_loops": 1,
 | 
						|
                            "rows": 2,
 | 
						|
                            "r_rows": 2,
 | 
						|
                            "cost": "REPLACED",
 | 
						|
                            "r_table_time_ms": "REPLACED",
 | 
						|
                            "r_other_time_ms": "REPLACED",
 | 
						|
                            "r_engine_stats": REPLACED,
 | 
						|
                            "filtered": 100,
 | 
						|
                            "r_filtered": 100
 | 
						|
                          }
 | 
						|
                        },
 | 
						|
                        {
 | 
						|
                          "block-nl-join": {
 | 
						|
                            "table": {
 | 
						|
                              "table_name": "t3",
 | 
						|
                              "access_type": "ALL",
 | 
						|
                              "loops": 2,
 | 
						|
                              "r_loops": 1,
 | 
						|
                              "rows": 2,
 | 
						|
                              "r_rows": 2,
 | 
						|
                              "cost": "REPLACED",
 | 
						|
                              "r_table_time_ms": "REPLACED",
 | 
						|
                              "r_other_time_ms": "REPLACED",
 | 
						|
                              "r_engine_stats": REPLACED,
 | 
						|
                              "filtered": 100,
 | 
						|
                              "r_filtered": 100
 | 
						|
                            },
 | 
						|
                            "buffer_type": "flat",
 | 
						|
                            "buffer_size": "119",
 | 
						|
                            "join_type": "BNL",
 | 
						|
                            "r_loops": 2,
 | 
						|
                            "r_filtered": 100,
 | 
						|
                            "r_unpack_time_ms": "REPLACED",
 | 
						|
                            "r_other_time_ms": "REPLACED",
 | 
						|
                            "r_effective_rows": 2
 | 
						|
                          }
 | 
						|
                        }
 | 
						|
                      ]
 | 
						|
                    }
 | 
						|
                  },
 | 
						|
                  {
 | 
						|
                    "query_block": {
 | 
						|
                      "select_id": 3,
 | 
						|
                      "operation": "EXCEPT",
 | 
						|
                      "cost": "REPLACED",
 | 
						|
                      "r_loops": 1,
 | 
						|
                      "r_total_time_ms": "REPLACED",
 | 
						|
                      "nested_loop": [
 | 
						|
                        {
 | 
						|
                          "table": {
 | 
						|
                            "table_name": "t2",
 | 
						|
                            "access_type": "ALL",
 | 
						|
                            "loops": 1,
 | 
						|
                            "r_loops": 1,
 | 
						|
                            "rows": 2,
 | 
						|
                            "r_rows": 2,
 | 
						|
                            "cost": "REPLACED",
 | 
						|
                            "r_table_time_ms": "REPLACED",
 | 
						|
                            "r_other_time_ms": "REPLACED",
 | 
						|
                            "r_engine_stats": REPLACED,
 | 
						|
                            "filtered": 100,
 | 
						|
                            "r_filtered": 100
 | 
						|
                          }
 | 
						|
                        },
 | 
						|
                        {
 | 
						|
                          "block-nl-join": {
 | 
						|
                            "table": {
 | 
						|
                              "table_name": "t4",
 | 
						|
                              "access_type": "ALL",
 | 
						|
                              "loops": 2,
 | 
						|
                              "r_loops": 1,
 | 
						|
                              "rows": 2,
 | 
						|
                              "r_rows": 2,
 | 
						|
                              "cost": "REPLACED",
 | 
						|
                              "r_table_time_ms": "REPLACED",
 | 
						|
                              "r_other_time_ms": "REPLACED",
 | 
						|
                              "r_engine_stats": REPLACED,
 | 
						|
                              "filtered": 100,
 | 
						|
                              "r_filtered": 100
 | 
						|
                            },
 | 
						|
                            "buffer_type": "flat",
 | 
						|
                            "buffer_size": "119",
 | 
						|
                            "join_type": "BNL",
 | 
						|
                            "r_loops": 2,
 | 
						|
                            "r_filtered": 100,
 | 
						|
                            "r_unpack_time_ms": "REPLACED",
 | 
						|
                            "r_other_time_ms": "REPLACED",
 | 
						|
                            "r_effective_rows": 2
 | 
						|
                          }
 | 
						|
                        }
 | 
						|
                      ]
 | 
						|
                    }
 | 
						|
                  }
 | 
						|
                ]
 | 
						|
              }
 | 
						|
            }
 | 
						|
          }
 | 
						|
        }
 | 
						|
      }
 | 
						|
    ]
 | 
						|
  }
 | 
						|
}
 | 
						|
select * from ((select a,b,e,f from t1,t3) except (select c,d,g,h from t2,t4)) a;
 | 
						|
a	b	e	f
 | 
						|
1	1	4	4
 | 
						|
1	1	5	5
 | 
						|
2	2	5	5
 | 
						|
prepare stmt from "(select a,b,e,f from t1,t3) except (select c,d,g,h from t2,t4)";
 | 
						|
execute stmt;
 | 
						|
a	b	e	f
 | 
						|
1	1	4	4
 | 
						|
1	1	5	5
 | 
						|
2	2	5	5
 | 
						|
execute stmt;
 | 
						|
a	b	e	f
 | 
						|
1	1	4	4
 | 
						|
1	1	5	5
 | 
						|
2	2	5	5
 | 
						|
prepare stmt from "select * from ((select a,b,e,f from t1,t3) except (select c,d,g,h from t2,t4)) a";
 | 
						|
execute stmt;
 | 
						|
a	b	e	f
 | 
						|
1	1	4	4
 | 
						|
1	1	5	5
 | 
						|
2	2	5	5
 | 
						|
execute stmt;
 | 
						|
a	b	e	f
 | 
						|
1	1	4	4
 | 
						|
1	1	5	5
 | 
						|
2	2	5	5
 | 
						|
drop tables t1,t2,t3,t4;
 | 
						|
select 1 as a from dual except select 1 from dual;
 | 
						|
a
 | 
						|
(select 1 from dual) except (select 1 from dual);
 | 
						|
1
 | 
						|
(select 1 from dual into @v) except (select 1 from dual);
 | 
						|
ERROR 42000: You have an error in your SQL syntax; check the manual that corresponds to your MariaDB server version for the right syntax to use near 'into @v) except (select 1 from dual)' at line 1
 | 
						|
select 1 from dual ORDER BY 1 except select 1 from dual;
 | 
						|
ERROR 42000: You have an error in your SQL syntax; check the manual that corresponds to your MariaDB server version for the right syntax to use near 'except select 1 from dual' at line 1
 | 
						|
select 1 as a from dual union all select 1 from dual;
 | 
						|
a
 | 
						|
1
 | 
						|
1
 | 
						|
create table t1 (a int, b blob, a1 int, b1 blob) engine=MyISAM;
 | 
						|
create table t2 (c int, d blob, c1 int, d1 blob) engine=MyISAM;
 | 
						|
insert into t1 values (1,"ddd", 1, "sdfrrwwww"),(2, "fgh", 2, "dffggtt");
 | 
						|
insert into t2 values (2, "fgh", 2, "dffggtt"),(3, "ffggddd", 3, "dfgg");
 | 
						|
(select a,b,b1 from t1) except (select c,d,d1 from t2);
 | 
						|
a	b	b1
 | 
						|
1	ddd	sdfrrwwww
 | 
						|
create table t3 (select a,b,b1 from t1) except (select c,d,d1 from t2);
 | 
						|
show create table t3;
 | 
						|
Table	Create Table
 | 
						|
t3	CREATE TABLE `t3` (
 | 
						|
  `a` int(11) DEFAULT NULL,
 | 
						|
  `b` blob DEFAULT NULL,
 | 
						|
  `b1` blob DEFAULT NULL
 | 
						|
) ENGINE=MyISAM DEFAULT CHARSET=latin1 COLLATE=latin1_swedish_ci
 | 
						|
drop tables t1,t2,t3;
 | 
						|
#
 | 
						|
# MDEV-13723: Server crashes in ha_heap::find_unique_row or
 | 
						|
# Assertion `0' failed in st_select_lex_unit::optimize with INTERSECT
 | 
						|
#
 | 
						|
CREATE TABLE t (i INT);
 | 
						|
INSERT INTO t VALUES (1),(2);
 | 
						|
SELECT * FROM t WHERE i != ANY ( SELECT 3 EXCEPT SELECT 3 );
 | 
						|
i
 | 
						|
drop table t;
 | 
						|
# End of 10.3 tests
 |