× The internal search function is temporarily non-functional. The current search engine is no longer viable and we are researching alternatives.
As a stop gap measure, we are using Google's custom search engine service.
If you know of an easy to use, open source, search engine ... please contact support@midrange.com.


  • Subject: Re: SQL Statements embedded in RPG
  • From: "David Morris" <dmorris@xxxxxxxxxxxxx>
  • Date: Fri, 18 Feb 2000 10:08:49 -0700

james,

As Alexei pointed out, you can use the CLI APIs.  Those APIs are well suited to 
your needs.  
The other option is to use an SQLDA which defines the format of data returned 
from an SQL 
statement.  The RPGIV code that I referred to uses this technique.  The code 
that I referred to 
uses it in a more dynamic manner, but it could easily be used as follows:

ReturnArea     DS
Fld1...

EVAL SelStmt = 'Select * from filea where fld1 >  ''X'''
EVAL SqlHnd = CrtSQLHnd(SelStmt)

DOU FetchEOF or FetchErr
EVAL FetchRtn = FetchSQL(SqlHnd: ReturnArea)
IF not FetchEOF and not FetchErr
do something
ENDDO
ENDDO


>>> james@dansfoods.com 02/17/00 03:49PM >>>
On Thu, 17 Feb 2000, David Morris wrote:

> start fetching records.  The implementation of SQL is hidden.

Does anyone know if something like the following is possible (using
subprocedures or even linking to a C program, I'm using C syntax here -
the goal is to make the SQL API on the 400 similar to the API of other
database engines):

int err;
char database[] = "my_db";
char query_string[100] = "select field1,field2 from table";
char *result;

err = sql_open(sql_handle);
if (err)
        /* handle the error */

err = sql_select_database (sql_handle, database_name);
if (err)
        /* you know what to do */

err = sql_query (sql_handle, query_string);
if (err)
        /* this is an error */

err = sql_fetch_rows (sql_handle, result);


Now at this point all the rows that match the select statement are stored
in the result array.  What I see as the advantage here is that the query
string is not hard coded anywhere (well, in my example it is but it could
be passed as a parameter).  Could the AS/400 SQL API be wrapped in
functions that would allow this?  Does the AS/400 have an SQL API that can
be used in C programs?  I have looked on the AS/400 documentation site and
I haven't found anything.  Pointers to the relevant info would be much
appreciated.

James Rich
james@dansfoods.com 

+---
| This is the RPG/400 Mailing List!
| To submit a new message, send your mail to RPG400-L@midrange.com.
| To subscribe to this list send email to RPG400-L-SUB@midrange.com.
| To unsubscribe from this list send email to RPG400-L-UNSUB@midrange.com.
| Questions should be directed to the list owner/operator: david@midrange.com
+---


As an Amazon Associate we earn from qualifying purchases.

This thread ...


Follow On AppleNews
Return to Archive home page | Return to MIDRANGE.COM home page

This mailing list archive is Copyright 1997-2024 by midrange.com and David Gibbs as a compilation work. Use of the archive is restricted to research of a business or technical nature. Any other uses are prohibited. Full details are available on our policy page. If you have questions about this, please contact [javascript protected email address].

Operating expenses for this site are earned using the Amazon Associate program and Google Adsense.