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-rw-r--r--mysql-test/main/myisam.test19
1 files changed, 19 insertions, 0 deletions
diff --git a/mysql-test/main/myisam.test b/mysql-test/main/myisam.test
index f21136d4613..0b153514ecb 100644
--- a/mysql-test/main/myisam.test
+++ b/mysql-test/main/myisam.test
@@ -1810,3 +1810,22 @@ drop table t1;
#
show variables like 'myisam_block_size';
select @@global.myisam_block_size;
+
+
+--echo #
+--echo # MDEV-20704 An index on a double column erroneously uses prefix compression
+--echo #
+
+CREATE TABLE t1 (
+ id INT NOT NULL PRIMARY KEY,
+ d DOUBLE,
+ KEY (d)
+) ENGINE=MyISAM;
+let $MYSQLD_DATADIR= `select @@datadir`;
+--replace_result $MYSQLD_DATADIR MYSQLD_DATADIR
+--exec $MYISAMCHK -d $MYSQLD_DATADIR/test/t1
+DROP TABLE t1;
+
+--echo #
+--echo # End of 5.5 tests
+--echo #