RE: Quick (I hope) embedded SQL question - using IN()

["Elvis Budimlic" <ebudimlic@xxxxxxxxxxxxxxxxxxxxxxxxx>]

Some options, in order of personal preference:

1) Dynamic SQL
2) list each element (you can use host variables for elements in the list)
3) create an array to be used for the IN clause.  Make the array fit your
max elements in the list.  Use the array in your static SQL, listing all
elements in the IN clause.  For the case where you don't have enough real
elements to fill the array, just repeat the last element till your reach the
max.

Elvis

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-----Original Message-----
From: midrange-l-bounces@xxxxxxxxxxxx
[mailto:midrange-l-bounces@xxxxxxxxxxxx] On Behalf Of AGlauser@xxxxxxxxxxxx
Sent: Thursday, September 13, 2007 3:57 PM
To: Midrange technical discussions
Subject: Quick (I hope) embedded SQL question - using IN()

I've searched the list archives and Google but can't get the right terms 
to find a discussion of this.  I haven't read all of the relevant Redbooks 
yet, so I apologize if this is an RTFM question, but it would be really 
handy to get this particular query going soon.  I'm using RPG, but I think 
this applies to COBOL and SQL CLI as well.

There was a related thread on the RPG400 list a day or two ago about how 
to view the most recent SQL statement.  Charles Wilt suggested using the 
'Display last SQL statement' option from iSeries Navigator for the job, 
but this just tells me that the job ran "OPEN {cursorName}".  Doh!

This is my code so far:

       list = '(''A'',''B'')';

       exec sql DECLARE test CURSOR FOR
                select field1, field2, field3
                from testtbl
                where field1 IN :list
                FOR READ ONLY;

and testtbl contains
Field1  Field2  Field3
A       1       1
B       2       2
A       2       2
C       3       3


When I FETCH from the 'test' cursor, I get SQLSTATE = 02000, no rows 
returned.  However if I run the query from iSeries Navigator, I get the 
result I'd expect:

Field1  Field2  Field3
A       1       1
B       2       2
A       2       2

I expect that the SQL engine is seeing one comparison value of "('A','B')" 
instead of two, "A" and "B".  Do I need to use dynamic SQL (that is 
PREPARE) here, or do I just need to mess with the syntax some more?

- Adam

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