EVOLUTION-MANAGER

Edit File: order_by_zerolength-4285.test

# # MDEV-4285 Server crashes in ptr_compare on NOW and CAST in ORDER BY # create table t1 (pk int primary key); insert into t1 values (1),(2),(3),(4),(5),(6),(7),(8),(9),(10); # In strict mode the query produces result in a different order # (not ordered implicitly by PK and indeterministic), so we force sorting. # However, sorting also affects warnings, so we'll check them separately. --disable_warnings --sorted_result select * from t1 order by now(), cast(pk as char(0)); --enable_warnings show warnings; drop table t1; --echo # --echo # MDEV-17020: Assertion `length > 0' failed in ptr_compare upon ORDER BY with bad conversion --echo # set @save_sql_mode= @@sql_mode; SET @@sql_mode= ''; CREATE TABLE t1 (pk INT PRIMARY KEY); INSERT INTO t1 VALUES (1),(2); explain SELECT * FROM t1 ORDER BY 'foo', CONVERT(pk, CHAR(0)) LIMIT 2; SELECT * FROM t1 ORDER BY 'foo', Cast(pk as CHAR(0)) LIMIT 2; set @@sql_mode= @save_sql_mode; drop table t1;