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  1. MariaDB Server
  2. MDEV-29756

Spider self-locks for the duration of innodb_lock_wait_timeout upon INSERT .. SELECT

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Details

    • Bug
    • Status: Open (View Workflow)
    • Minor
    • Resolution: Unresolved
    • 10.4(EOL), 10.5(EOL), 10.6, 10.7(EOL), 10.8(EOL), 10.9(EOL), 10.10(EOL)
    • 10.6
    • None

    Description

      Set to Minor because the scenario is unlikely to be important from the user perspective.

      When the "remote" and "local" tables are on the same server, INSERT INTO <spider> SELECT FROM <underlying InnoDB table> locks up until innodb_lock_wait_timeout is exceeded. Same for CREATE .. SELECT.

      # Spider init should be here instead
      install soname 'ha_spider';
       
      --source include/have_innodb.inc
       
      SET spider_same_server_link= on;
      --eval create server s foreign data wrapper mysql options (host "127.0.0.1", database "test", user "root", port $MASTER_MYPORT);
       
      CREATE TABLE t (a INT) ENGINE=InnoDB;
      INSERT INTO t VALUES (1);
      SET spider_same_server_link= on;
      SET GLOBAL innodb_lock_wait_timeout= 1;
      CREATE TABLE t_spider (a INT) ENGINE=SPIDER COMMENT = "wrapper 'mysql', srv 's', table 't'";
      INSERT INTO t_spider SELECT * FROM t;
       
      # Cleanup
       
      DROP TABLE t_spider, t;
      DROP SERVER s;
      SET GLOBAL innodb_lock_wait_timeout= @@innodb_lock_wait_timeout;
       
      # Spider de-init should be here
      

      10.4 e4043152

      mysqltest: At line 14: query 'INSERT INTO t_spider SELECT * FROM t' failed: 1205: Lock wait timeout exceeded; try restarting transaction
      

      Reproducible on 10.4+, didn't try 10.3, I don't think there is any point in fixing it there even if it's fixable.

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            ycp Yuchen Pei
            elenst Elena Stepanova
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              Created:
              Updated:

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