PREPARE stmt FROM'UPDATE t1 t1 SET value = (SELECT 1 FROM t2 WHERE id = t1.id)';
execute stmt;
insertinto t1 values (1,10),(2,10),(3,10);
insertinto t2 values (1),(2);
execute stmt; # <<=== Memory leak happens on running this statement
select * from t1;
deallocateprepare stmt;
DROPTABLE t1,t2;
The above use case doesn't show memory leaking on 10.11.
The similar issue could take place on running the DELETE statement with the LIMIT clause in PS/SP mode. So, this task also about fixing a memory leak in the code that processes the DELETE statement.
Attachments
Issue Links
causes
MDEV-35249Assertion `(mem_root->flags & 4) == 0' failed in convert_subq_to_jtbm
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0.3
0
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Bug
Critical
MDEV-14959 Control over memory allocated for SP/PS
Backported to 10.5 as part of push of
MDEV-34757