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SHOW EXPLAIN: merge to 10.0-base.

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This commit is contained in:
Sergey Petrunya
2012-10-06 11:30:52 +04:00
parent 3194e33510 74816d2963
commit f54cb33e4b
37 changed files with 4047 additions and 198 deletions
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1078
mysql-test/r/show_explain.result Normal file
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drop table if exists t0, t1;
select * from performance_schema.setup_instruments where name like '%show_explain%';
NAME ENABLED TIMED
wait/synch/cond/sql/show_explain YES YES
# We've got no instances
select * from performance_schema.cond_instances where name like '%show_explain%';
NAME OBJECT_INSTANCE_BEGIN
# Check out if our cond is hit.
create table t0 (a int);
insert into t0 values (0),(1),(2),(3),(4),(5),(6),(7),(8),(9);
set @show_explain_probe_select_id=1;
set debug_dbug='d,show_explain_probe_join_exec_start';
select count(*) from t0 where a < 100000;
show explain for $thr2;
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t0 ALL NULL NULL NULL NULL 10 Using where
Warnings:
Note 1003 select count(*) from t0 where a < 100000
count(*)
10
set debug_dbug='';
select event_name
from performance_schema.events_waits_history_long
where event_name='wait/synch/cond/sql/show_explain';
event_name
wait/synch/cond/sql/show_explain
drop table t0;

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#
# Test how SHOW EXPLAIN is represented in performance schema
#
--source include/have_debug.inc
--source include/have_perfschema.inc
# Like all other perfschema tests, we don't work on embedded server:
--source include/not_embedded.inc
--disable_warnings
drop table if exists t0, t1;
--enable_warnings
select * from performance_schema.setup_instruments where name like '%show_explain%';
--echo # We've got no instances
select * from performance_schema.cond_instances where name like '%show_explain%';
--echo # Check out if our cond is hit.
create table t0 (a int);
insert into t0 values (0),(1),(2),(3),(4),(5),(6),(7),(8),(9);
let $thr1=`select connection_id()`;
connect (con1, localhost, root,,);
connection con1;
let $thr2=`select connection_id()`;
connection default;
let $wait_condition= select State='show_explain_trap' from information_schema.processlist where id=$thr2;
#
# Test SHOW EXPLAIN for simple queries
#
connection con1;
set @show_explain_probe_select_id=1;
set debug_dbug='d,show_explain_probe_join_exec_start';
send select count(*) from t0 where a < 100000;
connection default;
--source include/wait_condition.inc
evalp show explain for $thr2;
connection con1;
reap;
set debug_dbug='';
select event_name
from performance_schema.events_waits_history_long
where event_name='wait/synch/cond/sql/show_explain';
drop table t0;