first commit for openGauss connect odbc code

lobj.h

@@ -0,0 +1,40 @@
+/* File:			lobj.h
+ *
+ * Description:		See "lobj.c"
+ *
+ * Comments:		See "readme.txt" for copyright and license information.
+ *
+ */
+
+#ifndef __LOBJ_H__
+#define __LOBJ_H__
+
+
+#include "psqlodbc.h"
+
+struct lo_arg
+{
+	int			isint;
+	int			len;
+	union
+	{
+		int			integer;
+		char	   *ptr;
+		Int8	integer64;
+	}			u;
+};
+
+#define INV_WRITE					0x00020000
+#define INV_READ					0x00040000
+
+OID		odbc_lo_creat(ConnectionClass *conn, int mode);
+int		odbc_lo_open(ConnectionClass *conn, int lobjId, int mode);
+int		odbc_lo_close(ConnectionClass *conn, int fd);
+Int4		odbc_lo_read(ConnectionClass *conn, int fd, char *buf, Int4 len);
+Int4		odbc_lo_write(ConnectionClass *conn, int fd, char *buf, Int4 len);
+Int4		odbc_lo_lseek(ConnectionClass *conn, int fd, int offset, Int4 len);
+Int4		odbc_lo_tell(ConnectionClass *conn, int fd);
+
+Int8		odbc_lo_lseek64(ConnectionClass *conn, int fd, Int8 offset, Int4 len);
+Int8		odbc_lo_tell64(ConnectionClass *conn, int fd);
+#endif