I've created a WebFOCUS subquery file - (.sql) and the corresponding synonym (.mas/.acx) - AOK, as I can run it successfully from a TABLE FILE command.

Currently in the .sql file is command like 'WHERE T1."CAR" = 'AUDI''.

Can I make the hardcoded 'AUDI' a variable that I'd pass from the focexec?

I tried using an amper variable, but the system, understandably, thought I meant 'WHERE T1."CAR" = &CAR'.

This message has been edited. Last edited by: <Kathryn Henning>,

Went to the health club during lunch, and the answer came to me while on the rowing machine. (And here I thought nothing good ever came out of excercising.)

Rather than creating the .sql/.acx/.mas in an application folder, I instead create them via the 'ON TABLE HOLD AS n FORMAT SQL_SCRIPT' TABLE FILE subcommand.

The TABLE creating the SQL Script has the dynamic filtering I need to do.

By definition, the .sql./.acx/.mas are stored temporarily/for a particular run like all HOLD files.

Once the TABLE creating the script and synonym is done, I then bring the script into the next table via the DB_INFILE function, to create my required nested query.

So it looks like I'm set.

Anyone else using WF generated SQL scripts?

David, I haven't used SQL scripts but I'm interested in what you've done.
Do you have a code example that you can share?
Thanks.

No problem, Greg.

Here is an example of creating a subquery to be used in a nested subquery SELECT:

The example is running against the AdventureWorks2014 MS SQL Server sample database.

-*
-* Create a subquery (.sql/.mas/.acx) and store in temporary space.  
-*
TABLE FILE PRODUCTSUBCATEGORY
PRINT PRODUCTSUBCATEGORYID
WHERE NAME EQ 'Road Bikes'
ON TABLE HOLD AS SUBCATID FORMAT SQL_SCRIPT
END
-RUN
-*
-* Create a report from the PRODUCT table, using a nested subquery.  
-*
TABLE FILE PRODUCT
"Report Product Data for 'Road Bikes'"
PRINT PRODUCTID
      NAME
      PRODUCTSUBCATEGORYID
WHERE DB_INFILE(SUBCATID, PRODUCTSUBCATEGORY, PRODUCTSUBCATEGORY)
WHERE READLIMIT EQ 2
END  

Report results:

Report Product Data for 'Road Bikes' 
 
PRODUCTID NAME              PRODUCTSUBCATEGORYID 
749       Road-150 Red, 62  2 
750       Road-150 Red, 44  2  

With SQL tracing ON, here is what the created subquery looks like, as well as, the SELECT that actually pulls data from the database:

SELECT
(T1."ProductSubcategoryID") AS E01
FROM
AdventureWorks2014.Production.ProductSubcategory T1
WHERE
(T1."Name" = 'Road Bikes');
(FOC2546) SQL SCRIPT SUBCATID.SQL CREATED SUCCESSFULLY

SELECT
       TOP 2 T1."ProductID",
       T1."Name",
       T1."ProductSubcategoryID"
FROM
       AdventureWorks2014.Production.Product T1
WHERE
       (T1."ProductSubcategoryID" IN ( SELECT
                                        (T1."ProductSubcategoryID") AS E01
                                       FROM
                                            AdventureWorks2014.Production.ProductSubcategory T1
                                       WHERE
                                             (T1."Name" = 'Road Bikes')));  

I want to find out who at IB implemented FORMAT SQL_SCRIPT, so I can take them to a White Sox game, and then to Billy Goat's the next time they are in Chicago. :-)

Hi David,

Assuming that PRODUCT is in the same DB as PRODUCTSUBCATEGORY then you can create a JOIN between SUBCATID and PRODUCT rather than using DB_INFILE.

One advantage of the JOIN over DB_INFILE that I have found is that you can utilize other fields from the SQL_SCRIPT in your final report.

I think of this as using the SQL_SCRIPT as a CTE in SQL Server. Depending on your data structure it is much more efficient than holding to disk.

Stu,

Thanks.

Yeah, for sure we use the WF SQL script feature, to create inline view and scalar subquires, as well as the nested subquery I show in my example.

Also, for sure, which type of 'query within a query' you use depends upon your requirements and relational database/structure.

Dave