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51 lines
1.4 KiB
Text
51 lines
1.4 KiB
Text
#
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# Tests for SHOW EXPLAIN FOR functionality
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#
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--disable_warnings
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drop table if exists t0, t1;
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--enable_warnings
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create table t0 (a int);
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insert into t0 values (0),(1),(2),(3),(4),(5),(6),(7),(8),(9);
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create table t1 (a int);
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insert into t1 select A.a + 10*B.a + 100*C.a from t0 A, t0 B, t0 C;
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#
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# Try killing a non-existent thread
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#
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--error ER_NO_SUCH_THREAD
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show explain for 2*1000*1000*1000;
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# Setup two threads and their ids
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let $thr1=`select connection_id()`;
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connect (con1, localhost, root,,);
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connection con1;
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let $thr2=`select connection_id()`;
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connection default;
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# SHOW EXPLAIN FOR <idle thread>
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--error ER_ERROR_WHEN_EXECUTING_COMMAND
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eval show explain for $thr2;
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# SHOW EXPLAIN FOR <ourselves>
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--error ER_ERROR_WHEN_EXECUTING_COMMAND
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eval show explain for $thr1;
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# SHOW EXPLAIN FOR <running thread>
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connection con1;
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select get_lock('optimizer_done', 10);
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send select count(*) from t1 where a < 100000 and sleep(a*0 + release_lock('optimizer_done') +1);
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connection default;
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select get_lock('optimizer_done', 100);
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eval show explain for $thr2;
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select release_lock('optimizer_done');
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eval kill query $thr2;
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#insert into t1 values ('one'),('two'),('three');
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## TODO: Test this: multiple SHOW EXPLAIN calls in course of running of one select
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##
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## TODO: Test this: have several SHOW EXPLAIN requests be queued up for a
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## thread and served together.
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drop table t0,t1;
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