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Rex authored
Statements affected by this bug are delete statements that have all these conditions 1) single table delete syntax 2) and in (sub-query) predicate 3) semi-join optimization enabled 4) an order by clause. Semijoin optimization on an innocent looking query, such as DELETE FROM t1 WHERE c1 IN (select c2 from t2) ORDER BY c1; turns it from a single table delete to a multi-table delete. During multi_delete::initialize_tables for the top level join object, a table is initialized missing a keep_current_rowid flag, needed to position a handler for removal of the correct row after the filesort structure has been built. Fix provided by Monty (monty@mariadb.com) Pushed into 10.5 at Monty's request. Applicable to 10.6, 10.11, 11.0. OK'd by Monty in slack:#askmonty 2023-12-01
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