The follwing statements
SELECT GET_LOCK('lock1',10);
SELECT IS_FREE_LOCK('lock1');
SELECT IS_USED_LOCK('lock1');
SELECT RELEASE_LOCK('lock1');
are now classified as QUERY_TYPE_READ|QUERY_TYPE_WRITE. That will
make cooperative locking work if these functions are used inside
non-read-only transactions and outside transanctions.
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