refs #5510 hot varchar expansion with prefix keys is not supported

git-svn-id: file:///svn/mysql/tests/mysql-test@48062 c7de825b-a66e-492c-adef-691d508d4ae1

mysql-test/suite/tokudb.change_column/r/change_varchar_prefix_a.result

+DROP TABLE IF EXISTS t;
+SET SESSION TOKUDB_DISABLE_SLOW_ALTER=ON;
+SET SESSION DEFAULT_STORAGE_ENGINE='TokuDB';
+CREATE TABLE t (a VARCHAR(32), b VARCHAR(32), KEY(a(2)));
+SHOW CREATE TABLE t;
+Table	Create Table
+t	CREATE TABLE `t` (
+  `a` varchar(32) DEFAULT NULL,
+  `b` varchar(32) DEFAULT NULL,
+  KEY `a` (`a`(2))
+) ENGINE=TokuDB DEFAULT CHARSET=latin1
+ALTER TABLE t CHANGE COLUMN a a VARCHAR(100);
+ERROR 42000: Table 't' uses an extension that doesn't exist in this XYZ version
+ALTER TABLE t CHANGE COLUMN a a VARCHAR(256);
+ERROR 42000: Table 't' uses an extension that doesn't exist in this XYZ version
+DROP TABLE t;

mysql-test/suite/tokudb.change_column/t/change_varchar_prefix_a.test

+--disable_warnings
+DROP TABLE IF EXISTS t;
+--enable_warnings
+
+SET SESSION TOKUDB_DISABLE_SLOW_ALTER=ON;
+SET SESSION DEFAULT_STORAGE_ENGINE='TokuDB';
+
+CREATE TABLE t (a VARCHAR(32), b VARCHAR(32), KEY(a(2)));
+SHOW CREATE TABLE t;
+
+--replace_regex /MariaDB/XYZ/ /MySQL/XYZ/
+--error ER_UNSUPPORTED_EXTENSION
+ALTER TABLE t CHANGE COLUMN a a VARCHAR(100);
+
+--replace_regex /MariaDB/XYZ/ /MySQL/XYZ/
+--error ER_UNSUPPORTED_EXTENSION
+ALTER TABLE t CHANGE COLUMN a a VARCHAR(256);
+
+DROP TABLE t;
+
+
+
+
+

mysql-test/suite/tokudb.change_column/t/change_varchar_prefix_b.test

+--disable_warnings
+DROP TABLE IF EXISTS t;
+--enable_warnings
+
+SET SESSION TOKUDB_DISABLE_SLOW_ALTER=ON;
+SET SESSION DEFAULT_STORAGE_ENGINE='TokuDB';
+
+CREATE TABLE t (a VARCHAR(32), b VARCHAR(32), KEY(a(2)));
+SHOW CREATE TABLE t;
+
+ALTER TABLE t CHANGE COLUMN b b VARCHAR(100);
+
+ALTER TABLE t CHANGE COLUMN b b VARCHAR(256);
+
+DROP TABLE t;
+
+
+
+
+