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depending on table order multi_update::send_data() was counting updates, not updated rows. Thus if one record have several updates it will be counted several times in 'rows matched' but updated only once. multi_update::send_data() now counts only unique rows. sql/sql_update.cc: Fix bug#15028 Multitable update returns different numbers of matched rows depending on table order multi_update::send_data() now counts only unique rows. mysql-test/t/update.test: Test case for bug#15028 Multitable update returns different numbers of matched rows depending on table order mysql-test/r/update.result: Test case for bug#15028 Multitable update returns different numbers of matched rows depending on table order
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