Commit d62ca959 authored by unknown's avatar unknown
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Fix for BUG#7850: force the transaction isolation level to REPEATABLE READ... 

Fix for BUG#7850: force the transaction isolation level to REPEATABLE READ when --single-transaction


client/mysqldump.c:
  force the transaction isolation level to REPEATABLE READ when --single-transaction
parent 611fd752

client/mysqldump.c

+7 −0
Original line number Diff line number Diff line
@@ -2200,8 +2200,15 @@ static int start_transaction(MYSQL *mysql_con, my_bool consistent_read_now) 
    We use BEGIN for old servers. --single-transaction --master-data will fail

    on old servers, but that's ok as it was already silently broken (it didn't

    do a consistent read, so better tell people frankly, with the error).



    We want the first consistent read to be used for all tables to dump so we

    need the REPEATABLE READ level (not anything lower, for example READ

    COMMITTED would give one new consistent read per dumped table).

  */

  return (mysql_query_with_error_report(mysql_con, 0,

                                        "SET SESSION TRANSACTION ISOLATION "

                                        "LEVEL REPEATABLE READ") ||

          mysql_query_with_error_report(mysql_con, 0,

                                        consistent_read_now ?

                                        "START TRANSACTION "

                                        "WITH CONSISTENT SNAPSHOT" :