Adding a test for TABLE_TYPE=DIR

added:
  mysql-test/suite/connect/r/dir.result
  mysql-test/suite/connect/t/dir.test

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

+CREATE TABLE t1 (
+path VARCHAR(256) flag=1,
+fname VARCHAR(256),
+ftype CHAR(4),
+size DOUBLE(12,0) flag=5
+) ENGINE=CONNECT TABLE_TYPE=DIR FILE_NAME='*.txt'
+  OPTION_LIST='subdir=1';
+SELECT * FROM t1;
+path	fname	ftype	size
+SELECT fname, ftype, size FROM t1;
+fname	ftype	size
+boys	.txt	282
+boyswin	.txt	288
+boys2	.txt	282
+ALTER TABLE t1 OPTION_LIST='subdir=0';
+SHOW CREATE TABLE t1;
+Table	Create Table
+t1	CREATE TABLE `t1` (
+  `path` varchar(256) DEFAULT NULL `flag`=1,
+  `fname` varchar(256) DEFAULT NULL,
+  `ftype` char(4) DEFAULT NULL,
+  `size` double(12,0) DEFAULT NULL `flag`=5
+) ENGINE=CONNECT DEFAULT CHARSET=latin1 `TABLE_TYPE`=DIR `FILE_NAME`='*.txt' `OPTION_LIST`='subdir=0'
+SELECT fname, ftype, size FROM t1;
+fname	ftype	size
+boys	.txt	282
+boyswin	.txt	288
+INSERT INTO t1 VALUES ('','','','');
+ERROR HY000: Got error 174 'COLBLK SetBuffer: undefined Access Method' from CONNECT
+DROP TABLE t1;
+CREATE TABLE t1 ENGINE=CONNECT TABLE_TYPE=DIR FILE_NAME='*.txt';
+ERROR 42000: A table must have at least 1 column

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

+let $MYSQLD_DATADIR= `select @@datadir`;
+
+CREATE TABLE t1 (
+  path VARCHAR(256) flag=1,
+  fname VARCHAR(256),
+  ftype CHAR(4),
+  size DOUBLE(12,0) flag=5
+) ENGINE=CONNECT TABLE_TYPE=DIR FILE_NAME='*.txt'
+  OPTION_LIST='subdir=1';
+
+--replace_result $MYSQLD_DATADIR DATADIR/
+SELECT * FROM t1;
+
+--copy_file $MYSQL_TEST_DIR/suite/connect/std_data/boys.txt $MYSQLD_DATADIR/test/boys.txt
+--copy_file $MYSQL_TEST_DIR/suite/connect/std_data/boyswin.txt $MYSQLD_DATADIR/test/boyswin.txt
+
+--mkdir $MYSQLD_DATADIR/test/subdir/
+--copy_file $MYSQLD_DATADIR/test/boys.txt  $MYSQLD_DATADIR/test/subdir/boys2.txt
+--replace_result $MYSQLD_DATADIR DATADIR/
+SELECT fname, ftype, size FROM t1;
+ALTER TABLE t1 OPTION_LIST='subdir=0';
+SHOW CREATE TABLE t1;
+--replace_result $MYSQLD_DATADIR DATADIR/
+SELECT fname, ftype, size FROM t1;
+
+# TODO: add a better error message
+--error ER_GET_ERRMSG
+INSERT INTO t1 VALUES ('','','','');
+
+DROP TABLE t1;
+
+# TODO: automatically add columns
+--error ER_TABLE_MUST_HAVE_COLUMNS
+CREATE TABLE t1 ENGINE=CONNECT TABLE_TYPE=DIR FILE_NAME='*.txt';
+
+
+#
+# TODO: this fails on Linux
+#
+#CREATE TABLE t1 t1 (
+#  DRIVE CHAR(2),
+#  PATH VARCHAR(256),
+#  FNAME VARCHAR(256),
+#  FTYPE CHAR(4),
+#  SIZE DOUBLE(12,0) flag=5,
+#  MODIFIED datetime
+#) engine=CONNECT table_type=DIR file_name='*.txt';
+#SELECT * FROM t1;
+#DROP TABLE t1;
+
+--remove_file $MYSQLD_DATADIR/test/subdir/boys2.txt
+--rmdir $MYSQLD_DATADIR/test/subdir/
+--remove_file $MYSQLD_DATADIR/test/boys.txt
+--remove_file $MYSQLD_DATADIR/test/boyswin.txt