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# # Tests for the LAST_VALUE function # --disable_warnings drop table if exists t1; drop database if exists mysqltest; --enable_warnings # CREATE TABLE `queue` ( # `id` int(10) unsigned NOT NULL AUTO_INCREMENT, # `priority` int(11) DEFAULT NULL, # `state` int(11) DEFAULT NULL, # `pid` int(10) unsigned DEFAULT NULL, # `dat` varbinary(200) DEFAULT NULL, # PRIMARY KEY (`id`) # ) CREATE TABLE t1 (a INT, b INT, c INT, d INT); INSERT INTO t1 VALUES (1,3,0,NULL),(2,2,0,NULL),(3,4,0,NULL),(4,2,0,NULL); SELECT * FROM t1; UPDATE t1 SET c=LAST_VALUE(@last_a:=a,@last_b:=b,@last_c:=c,1), d=4211 WHERE c=0 ORDER BY b DESC LIMIT 1; SELECT @last_a, @last_b, @last_c; SELECT * FROM t1; DROP TABLE t1; # # Test with different types # # PS protocol gives slightly different metadata for the length --enable_metadata --disable_ps_protocol SELECT LAST_VALUE(@last_a:=1,@last_b:=1); select @last_b; --enable_ps_protocol #Check after fix MDEV-31540 --disable_cursor_protocol SELECT LAST_VALUE(@last_a:=1,@last_b:=1.0); select @last_b; SELECT LAST_VALUE(@last_a:=1,@last_b:="hello"); select @last_b; SELECT date(LAST_VALUE(@last_a:=1,@last_b:="2001-02-03")); select @last_b; SELECT LAST_VALUE(@last_a:=1,@last_b:="2001-02-03",NULL); select @last_b; --enable_cursor_protocol --disable_metadata --error ER_PARSE_ERROR SELECT LAST_VALUE();