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MDEV-13695: INTERSECT precedence is not in line with Oracle even in SQL_MODE=Oracle

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Switch off automatic INTERSECT  priority for ORACLE MODE
This commit is contained in:
Oleksandr Byelkin
2018-04-24 12:04:59 +02:00
parent 43c5dd0250
commit 0544d7c457
3 changed files with 100 additions and 1 deletions
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38
mysql-test/main/intersect.test
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@ -147,12 +147,25 @@ 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);
explain extended
(select a,b from t1) union (select c,d from t2) intersect (select e,f from t3) union (select 4,4);
set SQL_MODE=ORACLE;
--sorted_result
(select a,b from t1) union (select c,d from t2) intersect (select e,f from t3) union (select 4,4);
explain extended
(select a,b from t1) union (select c,d from t2) intersect (select e,f from t3) union (select 4,4);
set SQL_MODE=default;
# test result of linear mix operation
--sorted_result
(select e,f from t3) intersect (select c,d from t2) union (select a,b from t1) union (select 4,4);
explain extended
(select e,f from t3) intersect (select c,d from t2) union (select a,b from t1) union (select 4,4);
set SQL_MODE=ORACLE;
--sorted_result
(select e,f from t3) intersect (select c,d from t2) union (select a,b from t1) union (select 4,4);
explain extended
(select e,f from t3) intersect (select c,d from t2) union (select a,b from t1) union (select 4,4);
set SQL_MODE=default;
--sorted_result
(/* 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`);
@ -282,4 +295,29 @@ select count(*) from (
drop table t1,t2,t3;
--echo #
--echo # MDEV-13695: INTERSECT precedence is not in line with Oracle even
--echo # in SQL_MODE=Oracle
--echo #
create table t12(c1 int);
insert into t12 values(1);
insert into t12 values(2);
create table t13(c1 int);
insert into t13 values(1);
insert into t13 values(3);
create table t234(c1 int);
insert into t234 values(2);
insert into t234 values(3);
insert into t234 values(4);
set SQL_MODE=oracle;
--sorted_result
select * from t13 union select * from t234 intersect select * from t12;
set SQL_MODE=default;
--sorted_result
select * from t13 union select * from t234 intersect select * from t12;
drop table t12,t13,t234;
--echo # End of 10.3 tests