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|
--source include/force_myisam_default.inc
--source include/have_myisam.inc
delimiter |;
create procedure p_verify_reprepare_count(expected int)
begin
declare old_reprepare_count int default @reprepare_count;
select variable_value from
performance_schema.session_status where
variable_name='com_stmt_reprepare'
into @reprepare_count;
if old_reprepare_count + expected <> @reprepare_count then
select concat("Expected: ", expected,
", actual: ", @reprepare_count - old_reprepare_count)
as "ERROR";
else
select '' as "SUCCESS";
end if;
end|
delimiter ;|
set @reprepare_count= 0;
flush status;
--echo # SQLCOM_REPAIR:
create table t1 (a int) engine=MyISAM;
insert into t1 values (1), (2), (3);
prepare stmt from "repair table t1";
execute stmt;
drop table t1;
create table t1 (a1 int, a2 int) engine=myisam;
insert into t1 values (1, 10), (2, 20), (3, 30);
--echo # t1 has changed, and it's does not lead to reprepare
execute stmt;
alter table t1 add column b varchar(50) default NULL;
execute stmt;
call p_verify_reprepare_count(0);
alter table t1 drop column b;
execute stmt;
call p_verify_reprepare_count(0);
--echo # SQLCOM_ANALYZE:
prepare stmt from "analyze table t1";
execute stmt;
drop table t1;
create table t1 (a1 int, a2 int) engine=myisam;
insert into t1 values (1, 10), (2, 20), (3, 30);
--echo # t1 has changed, and it's not a problem
execute stmt;
alter table t1 add column b varchar(50) default NULL;
execute stmt;
alter table t1 drop column b;
execute stmt;
call p_verify_reprepare_count(0);
--echo # SQLCOM_OPTIMIZE:
prepare stmt from "optimize table t1";
execute stmt;
drop table t1;
create table t1 (a1 int, a2 int) engine=myisam;
insert into t1 values (1, 10), (2, 20), (3, 30);
--echo # t1 has changed, and it's not a problem
execute stmt;
alter table t1 add column b varchar(50) default NULL;
execute stmt;
alter table t1 drop column b;
execute stmt;
call p_verify_reprepare_count(0);
drop table t1;
drop procedure p_verify_reprepare_count;
|
