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  1. MariaDB Server
  2. MDEV-29624

Memory leak on pushdown of a merged derived table

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    Description

      Test case below to reproduce the bug using FederatedX engine.

      On the first server (remote, runs on 127.0.0.1 port 3310):

      CREATE DATABASE mdev;
      		 
      USE mdev;
      		 
      CREATE TABLE `t1` ( `a` int(11)) ENGINE=InnoDB;

      On the second server (local):

      CREATE TABLE `t1` ( `a` int(11)) ENGINE=FEDERATED CONNECTION='mysql://root@127.0.0.1:3310/mdev/t1'
      		 
       
      		 
      CREATE TABLE `t2` (`a` int(11)) ENGINE=InnoDB;
      		 
       
      		 
      SELECT * FROM t2, (SELECT * FROM t1 WHERE a > 3) dt WHERE t2.a=dt.a;

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          relates to

          Bug - A problem which impairs or prevents the functions of the product. MDEV-29505 LeakSanitizer errors in TABLE_LIST::find_derived_handler after federated.federatedx_create_handlers with PS protocol

          • Minor - Minor loss of function, or other problem where easy workaround is present.
          • Open

          Bug - A problem which impairs or prevents the functions of the product. MDEV-29655 ASAN heap-use-after-free in Pushdown_derived::Pushdown_derived

          • Critical - Crashes, loss of data, severe memory leak.
          • Closed

          Task - A task that needs to be done. MDEV-25080 Allow pushdown of queries involving UNIONs in outer select to foreign engines

          • Critical - Crashes, loss of data, severe memory leak.
          • Closed

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              oleg.smirnov Oleg Smirnov
              oleg.smirnov Oleg Smirnov
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                Updated:
                Resolved:

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