Adding tests for ALTER TABLE

modified:
  mysql-test/suite/connect/r/dbf.result
  mysql-test/suite/connect/t/dbf.test

mysql-test/suite/connect/r/dbf.result

@@ -401,5 +401,119 @@ Dec	5
 Flags	00
 --------	--------
 DROP TABLE IF EXISTS t1;
+#
+# Testing ALTER
+#
+CREATE TABLE t1
+(
+a VARCHAR(10)
+) ENGINE=CONNECT TABLE_TYPE=DBF FILE_NAME='t1.dbf';
+INSERT INTO t1 VALUES ('10');
+SELECT * FROM t1;
+a
+10
+CALL dbf_header('MYSQLD_DATADIR/test/t1.dbf');
+--------	--------
+FileSize	77
+DBF_Version	03
+NRecords	1
+FirstRecPos	66
+RecLength	11
+TableFlags	0000
+CodePageMark	00
+---	---
+FieldN	0
+Name	a
+Type	C
+Offset	0
+Length	10
+Dec	0
+Flags	00
+--------	--------
+ALTER TABLE t1 MODIFY a VARCHAR(10) NOT NULL;
+Warnings:
+Warning	1265	Data truncated for column 'a' at row 1
+SHOW CREATE TABLE t1;
+Table	Create Table
+t1	CREATE TABLE `t1` (
+  `a` varchar(10) NOT NULL
+) ENGINE=CONNECT DEFAULT CHARSET=latin1 `TABLE_TYPE`=DBF `FILE_NAME`='t1.dbf'
+SELECT * FROM t1;
+a
+10
+CALL dbf_header('MYSQLD_DATADIR/test/t1.dbf');
+--------	--------
+FileSize	77
+DBF_Version	03
+NRecords	1
+FirstRecPos	66
+RecLength	11
+TableFlags	0000
+CodePageMark	00
+---	---
+FieldN	0
+Name	a
+Type	C
+Offset	0
+Length	10
+Dec	0
+Flags	00
+--------	--------
+ALTER TABLE t1 MODIFY a INT(10) NOT NULL;
+Warnings:
+Warning	1366	Incorrect integer value: '' for column 'a' at row 1
+SHOW CREATE TABLE t1;
+Table	Create Table
+t1	CREATE TABLE `t1` (
+  `a` int(10) NOT NULL
+) ENGINE=CONNECT DEFAULT CHARSET=latin1 `TABLE_TYPE`=DBF `FILE_NAME`='t1.dbf'
+SELECT * FROM t1;
+a
+10
+CALL dbf_header('MYSQLD_DATADIR/test/t1.dbf');
+--------	--------
+FileSize	77
+DBF_Version	03
+NRecords	1
+FirstRecPos	66
+RecLength	11
+TableFlags	0000
+CodePageMark	00
+---	---
+FieldN	0
+Name	a
+Type	C
+Offset	0
+Length	10
+Dec	0
+Flags	00
+--------	--------
+ALTER TABLE t1 MODIFY a INT(8) NOT NULL;
+SHOW CREATE TABLE t1;
+Table	Create Table
+t1	CREATE TABLE `t1` (
+  `a` int(8) NOT NULL
+) ENGINE=CONNECT DEFAULT CHARSET=latin1 `TABLE_TYPE`=DBF `FILE_NAME`='t1.dbf'
+SELECT * FROM t1;
+ERROR HY000: Got error 174 'DBF file t1.dbf is corrupted' from CONNECT
+CALL dbf_header('MYSQLD_DATADIR/test/t1.dbf');
+--------	--------
+FileSize	77
+DBF_Version	03
+NRecords	1
+FirstRecPos	66
+RecLength	11
+TableFlags	0000
+CodePageMark	00
+---	---
+FieldN	0
+Name	a
+Type	C
+Offset	0
+Length	10
+Dec	0
+Flags	00
+--------	--------
+DROP TABLE IF EXISTS t1;
 DROP PROCEDURE test.dbf_field;
 DROP PROCEDURE test.dbf_header;

mysql-test/suite/connect/t/dbf.test

@@ -375,6 +375,44 @@ DROP TABLE IF EXISTS t1;
 # on /opt/mariadb-5.5/data/: Is a directory' from CONNECT 
 #CREATE TABLE t1 (a INT) ENGINE=CONNECT TABLE_TYPE=DBF;
 
+--echo #
+--echo # Testing ALTER
+--echo #
+CREATE TABLE t1
+(
+  a VARCHAR(10)
+) ENGINE=CONNECT TABLE_TYPE=DBF FILE_NAME='t1.dbf';
+INSERT INTO t1 VALUES ('10');
+SELECT * FROM t1;
+--chmod 0777 $MYSQLD_DATADIR/test/t1.dbf
+--vertical_results
+--replace_result $MYSQLD_DATADIR MYSQLD_DATADIR
+eval CALL dbf_header('$MYSQLD_DATADIR/test/t1.dbf');
+--horizontal_results
+ALTER TABLE t1 MODIFY a VARCHAR(10) NOT NULL;
+SHOW CREATE TABLE t1;
+SELECT * FROM t1;
+--vertical_results
+--replace_result $MYSQLD_DATADIR MYSQLD_DATADIR
+eval CALL dbf_header('$MYSQLD_DATADIR/test/t1.dbf');
+--horizontal_results
+ALTER TABLE t1 MODIFY a INT(10) NOT NULL;
+SHOW CREATE TABLE t1;
+SELECT * FROM t1;
+--vertical_results
+--replace_result $MYSQLD_DATADIR MYSQLD_DATADIR
+eval CALL dbf_header('$MYSQLD_DATADIR/test/t1.dbf');
+--horizontal_results
+ALTER TABLE t1 MODIFY a INT(8) NOT NULL;
+SHOW CREATE TABLE t1;
+--error ER_GET_ERRMSG
+SELECT * FROM t1;
+--vertical_results
+--replace_result $MYSQLD_DATADIR MYSQLD_DATADIR
+eval CALL dbf_header('$MYSQLD_DATADIR/test/t1.dbf');
+--horizontal_results
+DROP TABLE IF EXISTS t1;
+--remove_file $MYSQLD_DATADIR/test/t1.dbf
 
 DROP PROCEDURE test.dbf_field;
 DROP PROCEDURE test.dbf_header;