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Dmitry Lenev authored
FOR UPDATE is causing a lock". This patch tries to address problems which were exposed during backporting of original patch to 5.1 tree. - It ensures that we don't change locking behavior of simple SELECT statements on InnoDB tables when they are executed under LOCK TABLES ... READ and with @@innodb_table_locks=0. Also we no longer pass TL_READ_DEFAULT/TL_WRITE_DEFAULT lock types, which are supposed to be parser-only, to handler::start_stmt() method. - It makes check_/no_concurrent_insert.inc auxiliary scripts more robust against changes in test cases that use them and also ensures that they don't unnecessarily change environment of caller.
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