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    • jan's avatar
      Setting a isolation level of the transaction to read committed · 1bd22ab3
      jan authored
      weakens the locks for this session similarly like the option
      innodb_locks_unsafe_for_binlog. This patch removes almost all
      gap locking (used in next-key locking) and makes MySQL to release
      the row locks on the rows which does not belong to result set.
      Additionally, nonlocking selects on INSERT INTO SELECT,
      UPDATE ... (SELECT ...), and CREATE ... SELECT ... use a
      nonlocking consistent read. If a binlog is used, then binlog
      format should be set to row based binloging to make the execution
      of the complex SQL statements.
      1bd22ab3