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

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client/mysqldump.c:
  force the transaction isolation level to REPEATABLE READ when --single-transaction
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unknown 2005-01-13 00:44:13 +01:00
commit d62ca95951
1 changed files with 7 additions and 0 deletions
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7
client/mysqldump.c
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@ -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" :