--source include/not_embedded.inc
--source include/have_query_cache.inc
--source include/have_debug.inc

#
# Bug #30887 Server crashes on SET GLOBAL query_cache_size=0
#
flush status;
set query_cache_type=DEMAND;
set global query_cache_size= 1024*768;
--disable_warnings
drop table if exists t1;
--enable_warnings
create table t1 (a varchar(100));
insert into t1 values ('aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa'),('bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb');
connect (bug30887con1, localhost, root, ,test);
connect (bug30887con2, localhost, root, ,test);

connection bug30887con1;
--echo Activate debug hook and attempt to retrieve the statement from the cache.
set session debug='+d,wait_in_query_cache_insert';
--send select SQL_CACHE * from t1;

connection default;
let $wait_condition= select count(*)= 1 from information_schema.processlist where state= 'wait_in_query_cache_insert';
--source include/wait_condition.inc

connection bug30887con2;
--echo On a second connection; clear the query cache.
show status like 'Qcache_queries_in_cache';
set global query_cache_size= 0;

connection default;
--echo Signal the debug hook to release the lock.
select id from information_schema.processlist where state='wait_in_query_cache_insert' into @thread_id;
kill query @thread_id;

--echo Show query cache status.
show status like 'Qcache_queries_in_cache';

disconnect bug30887con1;
disconnect bug30887con2;
set global query_cache_size= 0;
use test;
drop table t1;

#
# Bug#41098: Query Cache returns wrong result with concurrent insert
#

SET @old_concurrent_insert= @@GLOBAL.concurrent_insert;
SET @old_query_cache_size= @@GLOBAL.query_cache_size;

--disable_warnings
DROP TABLE IF EXISTS t1, t2;
--enable_warnings
CREATE TABLE t1 (a INT);
CREATE TABLE t2 (a INT);
INSERT INTO t1 VALUES (1),(2),(3);

SET GLOBAL concurrent_insert= 1;
SET GLOBAL query_cache_size= 1024*512;
SET GLOBAL query_cache_type= ON;

connect(con1,localhost,root,,test,,);
connect(con2,localhost,root,,test,,);

connection con1;
--echo # Switch to connection con1
SET SESSION debug='+d,wait_after_query_cache_invalidate';
--echo # Send concurrent insert, will wait in the query cache table invalidate
--send INSERT INTO t1 VALUES (4)

connection default;
--echo # Switch to connection default
--echo # Wait for concurrent insert to reach the debug point
let $wait_condition=
  SELECT COUNT(*) = 1 FROM INFORMATION_SCHEMA.PROCESSLIST
  WHERE STATE = "wait_after_query_cache_invalidate" AND
        INFO = "INSERT INTO t1 VALUES (4)";
--source include/wait_condition.inc

connection con2;
--echo # Switch to connection con2
--echo # Send SELECT that shouldn't be cached
SELECT * FROM t1;

connection default;
--echo # Switch to connection default
--echo # Notify the concurrent insert to proceed
SELECT ID FROM INFORMATION_SCHEMA.PROCESSLIST
  WHERE STATE = 'wait_after_query_cache_invalidate' INTO @thread_id;
KILL QUERY @thread_id;

connection con1;
--echo # Switch to connection con1
--echo # Gather insert result
--reap
SHOW STATUS LIKE "Qcache_queries_in_cache";
--echo # Test that it's cacheable
SELECT * FROM t1;
SHOW STATUS LIKE "Qcache_queries_in_cache";

--echo # Disconnect
disconnect con1;
disconnect con2;

connection default;
--echo # Restore defaults
RESET QUERY CACHE;
DROP TABLE t1,t2;
SET GLOBAL concurrent_insert= DEFAULT;
SET GLOBAL query_cache_size= DEFAULT;
SET GLOBAL query_cache_type= DEFAULT;