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|
connection master;
--echo # CTE in Prepared statement with parameters
create table t1(c1 int,c2 int);
insert into t1 values(1,2),(3,4);
create table t2(a int, b int, c int, d int, e int);
--echo # Parameters in CTE which is referenced twice
prepare s from
'with qn as (select * from t1 where c1=?)
select * from qn, qn as qn1';
set @p_qn=1;
execute s using @p_qn;
--echo # Parameters in two CTEs which are referenced in FROM
--echo # in the opposite order of their WITH definitions.
prepare s from
'with qn as (select * from t1 where c1=?),
qn2 as (select * from t1 where c1=?)
select ? , qn.*, qn2.* from qn2 left join qn on 1';
--echo # Test binlogging, with INSERT SELECT, to see if the
--echo # parameter-substituted query is correct.
prepare si from
'insert into t2
with qn as (select * from t1 where c1=?),
qn2 as (select * from t1 where c1=?)
select ? , qn.*, qn2.* from qn2 left join qn on 1';
set @p_qn=1,@p_qn2=2,@p_select=10;
execute s using @p_qn,@p_qn2,@p_select;
--echo # We execute twice, as 2nd-exec bugs are common.
execute s using @p_qn,@p_qn2,@p_select;
execute si using @p_qn,@p_qn2,@p_select;
execute si using @p_qn,@p_qn2,@p_select;
select * from t2;
sync_slave_with_master;
connection slave;
--echo # On slave:
select * from t2;
--echo # Back to Master.
connection master;
set @p_qn=2,@p_qn2=1,@p_select=20;
execute s using @p_qn,@p_qn2,@p_select;
execute s using @p_qn,@p_qn2,@p_select;
execute si using @p_qn,@p_qn2,@p_select;
execute si using @p_qn,@p_qn2,@p_select;
select * from t2;
sync_slave_with_master;
--echo # On slave:
select * from t2;
--echo # Back to Master.
connection master;
drop table t1;
--echo # CTE in SP
delimiter |;
create table t1(a int)|
insert into t1 values(1),(2)|
create table t3(a char(16), b int)|
--echo # Materialized CTE
create procedure cur1()
begin
declare a char(16);
declare b int;
declare done int default 0;
declare c cursor for
with qn(x,y) as (select * from t1, t1 t2 limit 4)
select x,y from qn where y<3 order by x;
declare continue handler for sqlstate '02000' set done = 1;
open c;
repeat
fetch c into a, b;
if not done then
insert into test.t3 values (a,b);
end if;
until done end repeat;
close c;
end|
call cur1()|
--sorted_result
select * from t3|
sync_slave_with_master|
connection slave|
--echo # On slave:
--sorted_result
select * from t3|
--echo # Back to Master.
connection master|
delete from t3|
# Test 2nd execution
call cur1()|
--sorted_result
select * from t3|
sync_slave_with_master|
connection slave|
--echo # On slave:
--sorted_result
select * from t3|
--echo # Back to Master.
connection master|
delete from t3|
drop procedure cur1|
--echo # Merged CTE
create procedure cur1()
begin
declare a char(16);
declare b int;
declare done int default 0;
declare c cursor for
with qn(x,y) as (select * from t1, t1 t2)
select x,y from qn where y<3 order by x;
declare continue handler for sqlstate '02000' set done = 1;
open c;
repeat
fetch c into a, b;
if not done then
insert into test.t3 values (a,b);
end if;
until done end repeat;
close c;
end|
call cur1()|
--sorted_result
select * from t3|
sync_slave_with_master|
connection slave|
--echo # On slave:
--sorted_result
select * from t3|
--echo # Back to Master.
connection master|
delete from t3|
call cur1()|
--sorted_result
select * from t3|
sync_slave_with_master|
connection slave|
--echo # On slave:
--sorted_result
select * from t3|
--echo # Back to Master.
connection master|
delete from t3|
drop procedure cur1|
--echo # Recursive CTE
# Note the "select **t1.a**"; a mere "select a" would select the local
# variable!
create procedure cur1()
begin
declare a char(16);
declare b int;
declare done int default 0;
declare c cursor for
with recursive qn(x) as (
select t1.a from t1 union all select x*3 from qn where x<100)
select "got ",x from qn;
declare continue handler for sqlstate '02000' set done = 1;
open c;
repeat
fetch c into a, b;
if not done then
insert into test.t3 values (a,b);
end if;
until done end repeat;
close c;
end|
call cur1()|
select * from t3|
sync_slave_with_master|
connection slave|
--echo # On slave:
select * from t3|
--echo # Back to Master.
connection master|
delete from t3|
call cur1()|
select * from t3|
sync_slave_with_master|
connection slave|
--echo # On slave:
select * from t3|
--echo # Back to Master.
connection master|
delete from t3|
drop procedure cur1|
--echo # A stored function, returning the highest generated number
--echo # under a limit provided in input.
create function func1(M int) returns int
return (
with recursive qn (n,x) as (
select 1, t1.a from t1 union all
select n+1, x*3 from qn where (x*3)<M)
select max(x) from qn )|
select func1(100),func1(200)|
drop function func1|
--echo # A trigger, which when inserting "b" in t3,
--echo # sets "a" to the highest generated number under "b"; indeed a
--echo # WITH cannot be used in a generated column's expression (which
--echo # cannot contain a subquery), so a workaround is a trigger.
create trigger t3_bi before insert on t3 for each row
begin
declare tmp int;
set tmp = (
with recursive qn (n,x) as (
select 1, t1.a from t1 union all
select n+1, x*3 from qn where (x*3)<new.b)
select max(x) from qn );
set new.a= tmp;
end|
delete from t3|
insert into t3 (b) values(300),(1000)|
select * from t3|
sync_slave_with_master|
connection slave|
--echo # On slave:
select * from t3|
--echo # Back to Master.
connection master|
delete from t3|
drop trigger t3_bi|
--echo # A local variable used in CTE which is referenced twice
insert into t1 values(3),(4)|
create procedure cur1()
begin
declare a char(16);
declare b int default 0;
declare done int default 0;
declare c cursor for
with qn(x) as (select * from t1 where t1.a>b)
select x*10 from qn union all
select x*100 from qn;
declare continue handler for sqlstate '02000' set done = 1;
set b=2;
open c;
repeat
fetch c into a;
if not done then
insert into test.t3 values (a,1);
end if;
until done end repeat;
close c;
set b=3;
set done=0;
open c;
repeat
fetch c into a;
if not done then
insert into test.t3 values (a,2);
end if;
until done end repeat;
close c;
end|
call cur1()|
select * from t3|
sync_slave_with_master|
connection slave|
--echo # On slave:
select * from t3|
--echo # Back to Master.
connection master|
delete from t3|
drop procedure cur1|
--echo # Test binlogging, with INSERT SELECT, to see if the
--echo # parameter-substituted query is correct.
create procedure cur1()
begin
declare a char(16);
declare b int default 0;
set b=2;
insert into t3
with qn(x) as (select * from t1 where t1.a>b)
select x*10,1 from qn union all
select x*100,2 from qn;
end|
call cur1()|
select * from t3|
sync_slave_with_master|
connection slave|
--echo # On slave:
select * from t3|
--echo # Back to Master.
connection master|
delete from t3|
drop procedure cur1|
--echo # Two local variables in two CTEs which are referenced in FROM
--echo # in the opposite order of their WITH definitions.
create procedure cur1()
begin
declare a char(16);
declare b int default 0;
declare done int default 0;
declare c cursor for
with qn(x) as (select t1.a from t1 where t1.a=b),
qn1(x) as (select t1.a*10 from t1 where t1.a=a)
select qn1.x-qn.x from qn1, qn;
declare continue handler for sqlstate '02000' set done = 1;
set a=2,b=3;
open c;
repeat
fetch c into a;
if not done then
insert into test.t3 values (a,1);
end if;
until done end repeat;
close c;
end|
call cur1()|
select * from t3|
sync_slave_with_master|
connection slave|
--echo # On slave:
select * from t3|
--echo # Back to Master.
connection master|
delete from t3|
call cur1()|
select * from t3|
sync_slave_with_master|
connection slave|
--echo # On slave:
select * from t3|
--echo # Back to Master.
connection master|
delete from t3|
drop procedure cur1|
--echo # Similar, with INSERT SELECT, to test binlogging
create procedure cur1()
begin
declare a char(16);
declare b int default 0;
set b=3,a=2;
insert into t3(a)
with qn(x) as (select t1.a from t1 where t1.a=b),
qn1(x) as (select t1.a*10 from t1 where t1.a=a)
select qn1.x-qn.x from qn1, qn;
end|
call cur1()|
select * from t3|
sync_slave_with_master|
connection slave|
--echo # On slave:
select * from t3|
--echo # Back to Master.
connection master|
delete from t3|
call cur1()|
select * from t3|
sync_slave_with_master|
connection slave|
--echo # On slave:
select * from t3|
--echo # Back to Master.
connection master|
delete from t3|
drop procedure cur1|
drop table t1,t2,t3|
delimiter ;|
|
