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|
--|
--| Filename : $Source: /cvsroot/gnade/gnade/samples/esql/simple_pkg.gpq,v $
--| Description : This is the main driver for the embedded SQL translator
--| Author : Michael Erdmann
--| Created On : 8.12.2000
--| Last Modified By: $Author: merdmann $
--| Last Modified On: $Date: 2004/03/20 08:30:20 $
--| Status : $State: Exp $
--|
--| Copyright (C) 2000 Michael Erdmann
--|
--| This program is free software; you can redistribute it and/or
--| modify it under the terms of the GNU General Public License
--| as published by the Free Software Foundation; either version 2
--| of the License, or (at your option) any later version.
--|
--| This program/code is distributed in the hope that it will be useful,
--| but WITHOUT ANY WARRANTY; without even the implied warranty of
--| MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
--| GNU General Public License for more details.
--|
--| You should have received a copy of the GNU General Public License along
--| with this program; if not, write to the Free Software Foundation, Inc.,
--| 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
--|
--| As a special exception, if other files instantiate generics from this
--| unit, or you link this unit with other files to produce an executable,
--| this unit does not by itself cause the resulting executable to be
--| covered by the GNU General Public License. This exception does not
--| however invalidate any other reasons why the executable file might be
--| covered by the GNU Public License.
--|
--| Functional Description
--| ======================
--|
--| This is an example for embedded SQL. It demonstrates the ISO/92
--| features and addtional esql extensions.
--|
--|
--| Restrictions
--| ============
--|
--| References
--| ==========
--|
--|
with Ada.Text_IO; use Ada.Text_IO;
with SQL_STANDARD; use SQL_STANDARD;
with Ada.Strings.Fixed; use Ada.Strings.Fixed;
with Ada.Strings; use Ada.Strings;
with GNU.DB.SQLCLI; use GNU.DB.SQLCLI;
package body Simple_Pkg is
Nothing_Found : exception;
Some_Error : exception;
package IO is new Ada.Text_IO.Integer_IO (Integer);
use IO;
EXEC SQL DECLARE DB01 DATABASE ;
-- **************************************************************** --
EXEC SQL DECLARE DEPARTMENTS TABLE (
DEPTNO INT,
NAME CHAR ( 1..40 ),
LOCATION CHAR ( 1..40 )
);
EXEC SQL DECLARE EMPLOYEES TABLE (
EMPNO INT,
NAME CHAR( 1..40 ),
FIRSTNAME CHAR( 1..40 ),
DEPTNO INT,
SINCE CHAR( 1..20 ),
MANAGER INT,
JOB CHAR( 1..20 ),
PROMOTION CHAR( 1..50 ),
SALARY REAL
) ;
-- ***************************************************************** --
EXEC SQL DECLARE test_sql STATEMENT ;
-- ***************************************************************** --
procedure Get_Manager(
manager : in Integer ) is
---
EXEC SQL BEGIN DECLARE SECTION END-EXEC
name : CHAR(1..40);
depno_ind : INDICATOR_TYPE := 0;
empno, depno : INT;
Manager_To_Find : INT := INT(manager) ;
dep_location : CHAR (1..40);
EXEC SQL END DECLARE SECTION END-EXEC
H : SQLHSTMT;
C : SQLHDBC ;
procedure Not_Found is
begin
Put_Line("** procedure Nothing_Found called" );
Put_Line("** Error message: " & Trim( SQLCA.Message, Right ) );
end Not_Found;
--
-- test a single query without cursor
--
procedure Print_Employee(
His_Number : Integer;
EXEC SQL DECLARE DB01x DATABASE ) is
---
EXEC SQL INCLUDE SQLCA NAMED BY MY_SQLCA;
---
begin
empno := INT(His_Number);
EXEC SQL WHENEVER NOT FOUND DO Not_Found;
EXEC SQL AT DB01x
SELECT NAME, DEPTNO INTO :name, :depno
FROM EMPLOYEES
WHERE EMPNO = :empno ;
EXEC SQL AT DB01x
SELECT LOCATION INTO :dep_location
FROM DEPARTMENTS
WHERE DEPTNO = :depno ;
if SQLCODE not in SQL_STANDARD.NOT_FOUND then
Put_Line(
"Employee : " & Trim(To_String(Name),Right) &
" working in dep. " & INT'Image(depno) &
" located at " & Trim(To_String(dep_location),Right) );
end if;
-- get the ODBC handles
H := EXEC SQL INCLUDE STATEMENT HANDLE OF DB01x ;
C := EXEC SQL INCLUDE CONNECTION HANDLE OF DB01x ;
EXEC SQL WHENEVER NOT FOUND CONTINUE;
EXEC SQL RESET SQLCA ;
end Print_Employee;
---
begin
Put_Line("Printing all employees working for Manager " &
Integer'Image(Manager) );
Put_Line("");
EXEC SQL AT DB01
DECLARE emp_cursor CURSOR FOR
SELECT EMPNO, NAME, DEPTNO
FROM EMPLOYEES
WHERE MANAGER = :Manager_To_Find ;
EXEC SQL WHENEVER NOT FOUND DO Not_Found;
EXEC SQL WHENEVER SQLERROR RAISE Some_Error;
Put_Line("Emp. Number Employee");
Put_Line("=========== ======================");
EXEC SQL AT DB01
OPEN emp_cursor ;
-- read out all data seleted by the query
loop
EXEC SQL AT DB01
FETCH FROM emp_cursor
INTO :empno, :name, :depno INDICATOR :depno_ind ;
exit when SQLCODE in SQL_STANDARD.NOT_FOUND;
Put( Integer(empno), width => 10 ); -- employee number
Put( " " & To_String(Name) & " " ); -- name of the employee
if Is_Null( depno_ind ) then
Put( "department number not defined" );
else
Put (Integer(depno), Width => 10);
end if;
New_Line;
end loop;
Put_Line("");
EXEC SQL AT DB01 CLOSE emp_cursor;
-- This will perform a single query
Put_Line( "Printing Employee Data" );
Print_Employee(1, EXEC SQL INCLUDE DATABASE NAMED DB01 );
Print_Employee(2, EXEC SQL INCLUDE DATABASE NAMED DB01 );
exception
when Nothing_Found =>
Put_Line("Nobody found");
EXEC SQL WHENEVER NOT FOUND CONTINUE;
EXEC SQL WHENEVER SQLERROR CONTINUE;
EXEC SQL AT DB01 END ;
when Others =>
Put_Line( "Exception " );
EXEC SQL WHENEVER NOT FOUND CONTINUE;
EXEC SQL WHENEVER SQLERROR CONTINUE;
EXEC SQL AT DB01 END ;
raise;
end Get_Manager;
begin
EXEC SQL CONNECT "$DBUSER"
IDENTIFIED BY "$DBPASSWD"
BY DB01
TO "$DBSOURCE" ; -- Hallo Test
end Simple_Pkg;
--- end of file
|
