create table t1 (a int, b int);
create table t2 (c int, d int);
insert into t1 values (1,1),(2,2);
insert into t2 values (2,2),(3,3);
(select a,b from t1) intersect (select c,d from t2);
a	b
2	2
drop tables t1,t2;
create table t1 (a int, b int) engine=MyISAM;
create table t2 (c int, d int) engine=MyISAM;
create table t3 (e int, f int) engine=MyISAM;
insert into t1 values (1,1),(2,2),(3,3);
insert into t2 values (2,2),(3,3),(4,4);
insert into t3 values (1,1),(2,2),(5,5);
(select a,b from t1) intersect (select c,d from t2) intersect (select e,f from t3);
a	b
2	2
EXPLAIN (select a,b from t1) intersect (select c,d from t2) intersect (select e,f from t3);
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	PRIMARY	t1	ALL	NULL	NULL	NULL	NULL	3	
2	INTERSECT	t2	ALL	NULL	NULL	NULL	NULL	3	
3	INTERSECT	t3	ALL	NULL	NULL	NULL	NULL	3	
NULL	INTERSECT RESULT	<intersect1,2,3>	ALL	NULL	NULL	NULL	NULL	NULL	
EXPLAIN extended (select a,b from t1) intersect (select c,d from t2) intersect (select e,f from t3);
id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
1	PRIMARY	t1	ALL	NULL	NULL	NULL	NULL	3	100.00	
2	INTERSECT	t2	ALL	NULL	NULL	NULL	NULL	3	100.00	
3	INTERSECT	t3	ALL	NULL	NULL	NULL	NULL	3	100.00	
NULL	INTERSECT RESULT	<intersect1,2,3>	ALL	NULL	NULL	NULL	NULL	NULL	NULL	
Warnings:
Note	1003	(/* select#1 */ select `test`.`t1`.`a` AS `a`,`test`.`t1`.`b` AS `b` from `test`.`t1`) intersect (/* select#2 */ select `test`.`t2`.`c` AS `c`,`test`.`t2`.`d` AS `d` from `test`.`t2`) intersect (/* select#3 */ select `test`.`t3`.`e` AS `e`,`test`.`t3`.`f` AS `f` from `test`.`t3`)
EXPLAIN extended select * from ((select a,b from t1) intersect (select c,d from t2) intersect (select e,f from t3)) a;
id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
1	PRIMARY	<derived2>	ALL	NULL	NULL	NULL	NULL	3	100.00	
2	DERIVED	t1	ALL	NULL	NULL	NULL	NULL	3	100.00	
3	INTERSECT	t2	ALL	NULL	NULL	NULL	NULL	3	100.00	
4	INTERSECT	t3	ALL	NULL	NULL	NULL	NULL	3	100.00	
NULL	INTERSECT RESULT	<intersect2,3,4>	ALL	NULL	NULL	NULL	NULL	NULL	NULL	
Warnings:
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`) intersect (/* select#3 */ select `test`.`t2`.`c` AS `c`,`test`.`t2`.`d` AS `d` from `test`.`t2`) intersect (/* select#4 */ select `test`.`t3`.`e` AS `e`,`test`.`t3`.`f` AS `f` from `test`.`t3`)) `a`
EXPLAIN format=json (select a,b from t1) intersect (select c,d from t2) intersect (select e,f from t3);
EXPLAIN
{
  "query_block": {
    "union_result": {
      "table_name": "<intersect1,2,3>",
      "access_type": "ALL",
      "query_specifications": [
        {
          "query_block": {
            "select_id": 1,
            "table": {
              "table_name": "t1",
              "access_type": "ALL",
              "rows": 3,
              "filtered": 100
            }
          }
        },
        {
          "query_block": {
            "select_id": 2,
            "operation": "INTERSECT",
            "table": {
              "table_name": "t2",
              "access_type": "ALL",
              "rows": 3,
              "filtered": 100
            }
          }
        },
        {
          "query_block": {
            "select_id": 3,
            "operation": "INTERSECT",
            "table": {
              "table_name": "t3",
              "access_type": "ALL",
              "rows": 3,
              "filtered": 100
            }
          }
        }
      ]
    }
  }
}
ANALYZE format=json (select a,b from t1) intersect (select c,d from t2) intersect (select e,f from t3);
ANALYZE
{
  "query_block": {
    "union_result": {
      "table_name": "<intersect1,2,3>",
      "access_type": "ALL",
      "r_loops": 1,
      "r_rows": 1,
      "query_specifications": [
        {
          "query_block": {
            "select_id": 1,
            "r_loops": 1,
            "r_total_time_ms": "REPLACED",
            "table": {
              "table_name": "t1",
              "access_type": "ALL",
              "r_loops": 1,
              "rows": 3,
              "r_rows": 3,
              "r_total_time_ms": "REPLACED",
              "filtered": 100,
              "r_filtered": 100
            }
          }
        },
        {
          "query_block": {
            "select_id": 2,
            "operation": "INTERSECT",
            "r_loops": 1,
            "r_total_time_ms": "REPLACED",
            "table": {
              "table_name": "t2",
              "access_type": "ALL",
              "r_loops": 1,
              "rows": 3,
              "r_rows": 3,
              "r_total_time_ms": "REPLACED",
              "filtered": 100,
              "r_filtered": 100
            }
          }
        },
        {
          "query_block": {
            "select_id": 3,
            "operation": "INTERSECT",
            "r_loops": 1,
            "r_total_time_ms": "REPLACED",
            "table": {
              "table_name": "t3",
              "access_type": "ALL",
              "r_loops": 1,
              "rows": 3,
              "r_rows": 3,
              "r_total_time_ms": "REPLACED",
              "filtered": 100,
              "r_filtered": 100
            }
          }
        }
      ]
    }
  }
}
ANALYZE format=json select * from ((select a,b from t1) intersect (select c,d from t2) intersect (select e,f from t3)) a;
ANALYZE
{
  "query_block": {
    "select_id": 1,
    "r_loops": 1,
    "r_total_time_ms": "REPLACED",
    "table": {
      "table_name": "<derived2>",
      "access_type": "ALL",
      "r_loops": 1,
      "rows": 3,
      "r_rows": 1,
      "r_total_time_ms": "REPLACED",
      "filtered": 100,
      "r_filtered": 100,
      "materialized": {
        "query_block": {
          "union_result": {
            "table_name": "<intersect2,3,4>",
            "access_type": "ALL",
            "r_loops": 1,
            "r_rows": 1,
            "query_specifications": [
              {
                "query_block": {
                  "select_id": 2,
                  "r_loops": 1,
                  "r_total_time_ms": "REPLACED",
                  "table": {
                    "table_name": "t1",
                    "access_type": "ALL",
                    "r_loops": 1,
                    "rows": 3,
                    "r_rows": 3,
                    "r_total_time_ms": "REPLACED",
                    "filtered": 100,
                    "r_filtered": 100
                  }
                }
              },
              {
                "query_block": {
                  "select_id": 3,
                  "operation": "INTERSECT",
                  "r_loops": 1,
                  "r_total_time_ms": "REPLACED",
                  "table": {
                    "table_name": "t2",
                    "access_type": "ALL",
                    "r_loops": 1,
                    "rows": 3,
                    "r_rows": 3,
                    "r_total_time_ms": "REPLACED",
                    "filtered": 100,
                    "r_filtered": 100
                  }
                }
              },
              {
                "query_block": {
                  "select_id": 4,
                  "operation": "INTERSECT",
                  "r_loops": 1,
                  "r_total_time_ms": "REPLACED",
                  "table": {
                    "table_name": "t3",
                    "access_type": "ALL",
                    "r_loops": 1,
                    "rows": 3,
                    "r_rows": 3,
                    "r_total_time_ms": "REPLACED",
                    "filtered": 100,
                    "r_filtered": 100
                  }
                }
              }
            ]
          }
        }
      }
    }
  }
}
select * from ((select a,b from t1) intersect (select c,d from t2) intersect (select e,f from t3)) a;
a	b
2	2
prepare stmt from "(select a,b from t1) intersect (select c,d from t2) intersect (select e,f from t3);";
execute stmt;
a	b
2	2
execute stmt;
a	b
2	2
prepare stmt from "select * from ((select a,b from t1) intersect (select c,d from t2) intersect (select e,f from t3)) a";
execute stmt;
a	b
2	2
execute stmt;
a	b
2	2
(select a,b from t1) intersect (select c,e from t2,t3);
a	b
2	2
EXPLAIN (select a,b from t1) intersect (select c,e from t2,t3);
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	PRIMARY	t1	ALL	NULL	NULL	NULL	NULL	3	
2	INTERSECT	t2	ALL	NULL	NULL	NULL	NULL	3	
2	INTERSECT	t3	ALL	NULL	NULL	NULL	NULL	3	Using join buffer (flat, BNL join)
NULL	INTERSECT RESULT	<intersect1,2>	ALL	NULL	NULL	NULL	NULL	NULL	
EXPLAIN extended (select a,b from t1) intersect (select c,e from t2,t3);
id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
1	PRIMARY	t1	ALL	NULL	NULL	NULL	NULL	3	100.00	
2	INTERSECT	t2	ALL	NULL	NULL	NULL	NULL	3	100.00	
2	INTERSECT	t3	ALL	NULL	NULL	NULL	NULL	3	100.00	Using join buffer (flat, BNL join)
NULL	INTERSECT RESULT	<intersect1,2>	ALL	NULL	NULL	NULL	NULL	NULL	NULL	
Warnings:
Note	1003	(/* select#1 */ select `test`.`t1`.`a` AS `a`,`test`.`t1`.`b` AS `b` from `test`.`t1`) intersect (/* select#2 */ select `test`.`t2`.`c` AS `c`,`test`.`t3`.`e` AS `e` from `test`.`t2` join `test`.`t3`)
EXPLAIN extended select * from ((select a,b from t1) intersect (select c,e from t2,t3)) a;
id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
1	PRIMARY	<derived2>	ALL	NULL	NULL	NULL	NULL	3	100.00	
2	DERIVED	t1	ALL	NULL	NULL	NULL	NULL	3	100.00	
3	INTERSECT	t2	ALL	NULL	NULL	NULL	NULL	3	100.00	
3	INTERSECT	t3	ALL	NULL	NULL	NULL	NULL	3	100.00	Using join buffer (flat, BNL join)
NULL	INTERSECT RESULT	<intersect2,3>	ALL	NULL	NULL	NULL	NULL	NULL	NULL	
Warnings:
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`) intersect (/* select#3 */ select `test`.`t2`.`c` AS `c`,`test`.`t3`.`e` AS `e` from `test`.`t2` join `test`.`t3`)) `a`
EXPLAIN format=json (select a,b from t1) intersect (select c,e from t2,t3);
EXPLAIN
{
  "query_block": {
    "union_result": {
      "table_name": "<intersect1,2>",
      "access_type": "ALL",
      "query_specifications": [
        {
          "query_block": {
            "select_id": 1,
            "table": {
              "table_name": "t1",
              "access_type": "ALL",
              "rows": 3,
              "filtered": 100
            }
          }
        },
        {
          "query_block": {
            "select_id": 2,
            "operation": "INTERSECT",
            "table": {
              "table_name": "t2",
              "access_type": "ALL",
              "rows": 3,
              "filtered": 100
            },
            "block-nl-join": {
              "table": {
                "table_name": "t3",
                "access_type": "ALL",
                "rows": 3,
                "filtered": 100
              },
              "buffer_type": "flat",
              "buffer_size": "256Kb",
              "join_type": "BNL"
            }
          }
        }
      ]
    }
  }
}
ANALYZE format=json (select a,b from t1) intersect (select c,e from t2,t3);
ANALYZE
{
  "query_block": {
    "union_result": {
      "table_name": "<intersect1,2>",
      "access_type": "ALL",
      "r_loops": 1,
      "r_rows": 1,
      "query_specifications": [
        {
          "query_block": {
            "select_id": 1,
            "r_loops": 1,
            "r_total_time_ms": "REPLACED",
            "table": {
              "table_name": "t1",
              "access_type": "ALL",
              "r_loops": 1,
              "rows": 3,
              "r_rows": 3,
              "r_total_time_ms": "REPLACED",
              "filtered": 100,
              "r_filtered": 100
            }
          }
        },
        {
          "query_block": {
            "select_id": 2,
            "operation": "INTERSECT",
            "r_loops": 1,
            "r_total_time_ms": "REPLACED",
            "table": {
              "table_name": "t2",
              "access_type": "ALL",
              "r_loops": 1,
              "rows": 3,
              "r_rows": 3,
              "r_total_time_ms": "REPLACED",
              "filtered": 100,
              "r_filtered": 100
            },
            "block-nl-join": {
              "table": {
                "table_name": "t3",
                "access_type": "ALL",
                "r_loops": 1,
                "rows": 3,
                "r_rows": 3,
                "r_total_time_ms": "REPLACED",
                "filtered": 100,
                "r_filtered": 100
              },
              "buffer_type": "flat",
              "buffer_size": "256Kb",
              "join_type": "BNL",
              "r_filtered": 100
            }
          }
        }
      ]
    }
  }
}
ANALYZE format=json select * from ((select a,b from t1) intersect (select c,e from t2,t3)) a;
ANALYZE
{
  "query_block": {
    "select_id": 1,
    "r_loops": 1,
    "r_total_time_ms": "REPLACED",
    "table": {
      "table_name": "<derived2>",
      "access_type": "ALL",
      "r_loops": 1,
      "rows": 3,
      "r_rows": 1,
      "r_total_time_ms": "REPLACED",
      "filtered": 100,
      "r_filtered": 100,
      "materialized": {
        "query_block": {
          "union_result": {
            "table_name": "<intersect2,3>",
            "access_type": "ALL",
            "r_loops": 1,
            "r_rows": 1,
            "query_specifications": [
              {
                "query_block": {
                  "select_id": 2,
                  "r_loops": 1,
                  "r_total_time_ms": "REPLACED",
                  "table": {
                    "table_name": "t1",
                    "access_type": "ALL",
                    "r_loops": 1,
                    "rows": 3,
                    "r_rows": 3,
                    "r_total_time_ms": "REPLACED",
                    "filtered": 100,
                    "r_filtered": 100
                  }
                }
              },
              {
                "query_block": {
                  "select_id": 3,
                  "operation": "INTERSECT",
                  "r_loops": 1,
                  "r_total_time_ms": "REPLACED",
                  "table": {
                    "table_name": "t2",
                    "access_type": "ALL",
                    "r_loops": 1,
                    "rows": 3,
                    "r_rows": 3,
                    "r_total_time_ms": "REPLACED",
                    "filtered": 100,
                    "r_filtered": 100
                  },
                  "block-nl-join": {
                    "table": {
                      "table_name": "t3",
                      "access_type": "ALL",
                      "r_loops": 1,
                      "rows": 3,
                      "r_rows": 3,
                      "r_total_time_ms": "REPLACED",
                      "filtered": 100,
                      "r_filtered": 100
                    },
                    "buffer_type": "flat",
                    "buffer_size": "256Kb",
                    "join_type": "BNL",
                    "r_filtered": 100
                  }
                }
              }
            ]
          }
        }
      }
    }
  }
}
select * from ((select a,b from t1) intersect (select c,e from t2,t3)) a;
a	b
2	2
prepare stmt from "(select a,b from t1) intersect (select c,e from t2,t3);";
execute stmt;
a	b
2	2
execute stmt;
a	b
2	2
prepare stmt from "select * from ((select a,b from t1) intersect (select c,e from t2,t3)) a";
execute stmt;
a	b
2	2
execute stmt;
a	b
2	2
drop tables t1,t2,t3;
select 1 as a from dual intersect select 1 from dual;
a
1
(select 1 from dual) intersect (select 1 from dual);
1
1
(select 1 from dual into @v) intersect (select 1 from dual);
ERROR HY000: Incorrect usage of INTERSECT and INTO
select 1 from dual ORDER BY 1 intersect 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 'intersect select 1 from dual' at line 1
select 1 as a from dual union all select 1 from dual;
a
1
1
select 1 from dual intersect all select 1 from dual;
ERROR HY000: Incorrect usage of INTERSECT and ALL
create table t1 (a int, b blob, a1 int, b1 blob);
create table t2 (c int, d blob, c1 int, d1 blob);
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) intersect (select c,d,d1 from t2);
a	b	b1
2	fgh	dffggtt
drop tables t1,t2;
create table t1 (a int, b blob) engine=MyISAM;
create table t2 (c int, d blob) engine=MyISAM;
create table t3 (e int, f blob) engine=MyISAM;
insert into t1 values (1,1),(2,2),(3,3);
insert into t2 values (2,2),(3,3),(4,4);
insert into t3 values (1,1),(2,2),(5,5);
(select a,b from t1) intersect (select c,d from t2) intersect (select e,f from t3);
a	b
2	2
select * from ((select a,b from t1) intersect (select c,d from t2) intersect (select e,f from t3)) a;
a	b
2	2
prepare stmt from "(select a,b from t1) intersect (select c,d from t2) intersect (select e,f from t3);";
execute stmt;
a	b
2	2
execute stmt;
a	b
2	2
prepare stmt from "select * from ((select a,b from t1) intersect (select c,d from t2) intersect (select e,f from t3)) a";
execute stmt;
a	b
2	2
execute stmt;
a	b
2	2
create table t4  (select a,b from t1) intersect (select c,d from t2) intersect (select e,f from t3);
show create table t4;
Table	Create Table
t4	CREATE TABLE `t4` (
  `a` int(11) DEFAULT NULL,
  `b` blob DEFAULT NULL
) ENGINE=MyISAM DEFAULT CHARSET=latin1
drop tables t1,t2,t3,t4;
create table t1 (a int, b blob) engine=MyISAM;
create table t2 (c int, d blob) engine=MyISAM;
create table t3 (e int, f blob) engine=MyISAM;
insert into t1 values (1,1),(2,2),(3,3);
insert into t2 values (2,2),(3,3);
insert into t3 values (1,1),(2,2),(3,3);
(select a,b from t1) intersect (select c,d from t2) intersect (select e,f from t3) union (select 4,4);
a	b
2	2
3	3
4	4
(select a,b from t1) intersect (select c,d from t2) intersect (select e,f from t3) union (select 4,4) except (select 2,2);
a	b
3	3
4	4
drop tables t1,t2,t3;
create table t1 (a int, b int);
create table t2 (c int, d int);
create table t3 (e int, f int);
insert into t1 values (1,1),(2,2),(3,3);
insert into t2 values (2,2),(3,3);
insert into t3 values (1,1),(2,2),(3,3);
(select a,b from t1) intersect (select c,d from t2) intersect (select e,f from t3) union (select 4,4);
a	b
2	2
3	3
4	4
(select a,b from t1) intersect (select c,d from t2) intersect (select e,f from t3) union (select 4,4) except (select 2,2);
a	b
3	3
4	4
drop tables t1,t2,t3;
#
# INTERSECT precedence
#
create table t1 (a int, b blob) engine=MyISAM;
create table t2 (c int, d blob) engine=MyISAM;
create table t3 (e int, f blob) engine=MyISAM;
insert into t1 values (5,5),(6,6);
insert into t2 values (2,2),(3,3);
insert into t3 values (1,1),(3,3);
(select a,b from t1) union (select c,d from t2) intersect (select e,f from t3) union (select 4,4);
a	b
3	3
4	4
5	5
6	6
explain extended
(select a,b from t1) union (select c,d from t2) intersect (select e,f from t3) union (select 4,4);
id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
1	PRIMARY	t1	ALL	NULL	NULL	NULL	NULL	2	100.00	
3	UNION	<derived2>	ALL	NULL	NULL	NULL	NULL	2	100.00	
2	DERIVED	t2	ALL	NULL	NULL	NULL	NULL	2	100.00	
4	INTERSECT	t3	ALL	NULL	NULL	NULL	NULL	2	100.00	
NULL	INTERSECT RESULT	<intersect2,4>	ALL	NULL	NULL	NULL	NULL	NULL	NULL	
5	UNION	NULL	NULL	NULL	NULL	NULL	NULL	NULL	NULL	No tables used
NULL	UNION RESULT	<union1,3,5>	ALL	NULL	NULL	NULL	NULL	NULL	NULL	
Warnings:
Note	1003	(/* select#1 */ select `test`.`t1`.`a` AS `a`,`test`.`t1`.`b` AS `b` from `test`.`t1`) union /* select#3 */ select `__3`.`c` AS `c`,`__3`.`d` AS `d` from ((/* select#2 */ select `test`.`t2`.`c` AS `c`,`test`.`t2`.`d` AS `d` from `test`.`t2`) intersect (/* select#4 */ select `test`.`t3`.`e` AS `e`,`test`.`t3`.`f` AS `f` from `test`.`t3`)) `__3` union (/* select#5 */ select 4 AS `4`,4 AS `4`)
(select e,f from t3) intersect (select c,d from t2) union (select a,b from t1) union (select 4,4);
e	f
3	3
4	4
5	5
6	6
explain extended
(select e,f from t3) intersect (select c,d from t2) union (select a,b from t1) union (select 4,4);
id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
1	PRIMARY	t3	ALL	NULL	NULL	NULL	NULL	2	100.00	
2	INTERSECT	t2	ALL	NULL	NULL	NULL	NULL	2	100.00	
3	UNION	t1	ALL	NULL	NULL	NULL	NULL	2	100.00	
4	UNION	NULL	NULL	NULL	NULL	NULL	NULL	NULL	NULL	No tables used
NULL	UNIT RESULT	<unit1,2,3,4>	ALL	NULL	NULL	NULL	NULL	NULL	NULL	
Warnings:
Note	1003	(/* select#1 */ select `test`.`t3`.`e` AS `e`,`test`.`t3`.`f` AS `f` from `test`.`t3`) intersect (/* select#2 */ select `test`.`t2`.`c` AS `c`,`test`.`t2`.`d` AS `d` from `test`.`t2`) union (/* select#3 */ select `test`.`t1`.`a` AS `a`,`test`.`t1`.`b` AS `b` from `test`.`t1`) union (/* select#4 */ select 4 AS `4`,4 AS `4`)
(/* select#1 */ select `test`.`t1`.`a` AS `a`,`test`.`t1`.`b` AS `b` from `test`.`t1`) union /* select#3 */ select `__3`.`c` AS `c`,`__3`.`d` AS `d` from ((/* select#2 */ select `test`.`t2`.`c` AS `c`,`test`.`t2`.`d` AS `d` from `test`.`t2`) intersect (/* select#4 */ select `test`.`t3`.`e` AS `e`,`test`.`t3`.`f` AS `f` from `test`.`t3`)) `__3` union (/* select#5 */ select 4 AS `4`,4 AS `4`);
a	b
3	3
4	4
5	5
6	6
prepare stmt from "(select a,b from t1) union (select c,d from t2) intersect (select e,f from t3) union (select 4,4)";
execute stmt;
a	b
5	5
6	6
3	3
4	4
execute stmt;
a	b
5	5
6	6
3	3
4	4
create view v1 as (select a,b from t1) union (select c,d from t2) intersect (select e,f from t3) union (select 4,4);
select b,a,b+1 from v1;
b	a	b+1
3	3	4
4	4	5
5	5	6
6	6	7
select b,a,b+1 from v1 where a > 3;
b	a	b+1
4	4	5
5	5	6
6	6	7
create procedure p1()
select * from v1;
call p1();
a	b
3	3
4	4
5	5
6	6
call p1();
a	b
3	3
4	4
5	5
6	6
drop procedure p1;
create procedure p1()
(select a,b from t1) union (select c,d from t2) intersect (select e,f from t3) union (select 4,4);
call p1();
a	b
3	3
4	4
5	5
6	6
call p1();
a	b
3	3
4	4
5	5
6	6
drop procedure p1;
show create view v1;
View	Create View	character_set_client	collation_connection
v1	CREATE ALGORITHM=UNDEFINED DEFINER=`root`@`localhost` SQL SECURITY DEFINER VIEW `v1` AS (select `test`.`t1`.`a` AS `a`,`test`.`t1`.`b` AS `b` from `test`.`t1`) union select `__3`.`c` AS `c`,`__3`.`d` AS `d` from ((select `test`.`t2`.`c` AS `c`,`test`.`t2`.`d` AS `d` from `test`.`t2`) intersect (select `test`.`t3`.`e` AS `e`,`test`.`t3`.`f` AS `f` from `test`.`t3`)) `__3` union (select 4 AS `4`,4 AS `4`)	latin1	latin1_swedish_ci
drop view v1;
drop tables t1,t2,t3;