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#
# Bug31048: Many nested subqueries may cause server crash.
#
create table t1(a int,b int,key(a),key(b));
insert into t1(a,b) values (1,2),(2,1),(2,3),(3,4),(5,4),(5,5),
(6,7),(7,4),(5,3);
let $nesting= 26;
let $should_work_nesting= 5;
let $start= select sum(a),a from t1 where a> ( select sum(a) from t1 ;
let $end= )group by a ;
let $start_app= where a> ( select sum(a) from t1 ;
let $end_pre= )group by b limit 1 ;
--disable_result_log
--disable_query_log
# At least 4 level nesting should work without errors
while ($should_work_nesting)
{
--echo $should_work_nesting
eval $start $end;
eval explain $start $end;
let $start= $start
$start_app;
let $end= $end_pre
$end;
dec $should_work_nesting;
}
# Other may fail with the 'stack overrun error'
while ($nesting)
{
--echo $nesting
--error EE_OK,ER_STACK_OVERRUN_NEED_MORE
eval $start $end;
--error EE_OK,ER_STACK_OVERRUN_NEED_MORE
eval explain $start $end;
let $start= $start
$start_app;
let $end= $end_pre
$end;
dec $nesting;
}
--enable_result_log
--enable_query_log
drop table t1;
--echo End of 5.1 tests
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