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field name as variable

Posted on 2010-09-22
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Last Modified: 2012-08-13
Hi,

I have the following situation:
a data structure defined as:

File1Fields       E DS                  Extname(File1)

in File2 (fldname,value)  I have all the field names of File1 and their values (fld1,val1 ; fld2, val1).

now, i want to initialize File1Fields with the values from file2,

File1Fields.fld1 would equal a value of fld1 from File2 and so on...

The problem is how to reference  those fields in File1Fields without hardcoding their name
and having only field name in a variable (field) of File2.
if there would be a way to iterate through a data structure than there would not be a problem:

File1Fields(i) = value;

Any suggestions ?
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Question by:iskibinska
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5 Comments
 
LVL 16

Expert Comment

by:theo kouwenhoven
ID: 33743154
Hi Iskibinsa,

What you can do is to use fields from file 2, for creating a SQL insert or update command .
(Dynamic imbedded SQL)

Good Luck,
Murph


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Author Comment

by:iskibinska
ID: 33743451
Hi Murph,

Could you send me a code snippet ?
i am not sure if i follow your idea

Thanks
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LVL 16

Expert Comment

by:theo kouwenhoven
ID: 33743848
Just an example to get the idea, not sompiled, not tested:
D**************************************************                                                                
D SQLSTMT         S           1024A   
D**************************************************                                                                
 /free
    Eval SQLSTM = 'INSERT INTO FILE1 (' + Field1 + ', 'Field2 + ','    
                + Field2 + ', 'Field3 + ',' + Field4 + ') Values(' +    
                + Val1 + ', 'Val2 + ',' + Val3 +',' + Val4 + ')
 /end-free
C*************************************************************
C* Prepare STMT as initialized in declare section            *
C*************************************************************
C/EXEC SQL
C+ PREPARE S1 FROM :SQLSTM
C/END-EXEC
C*
C*************************************
C* Declare Cursor for STMT           *
C*************************************
C/EXEC SQL
C+ DECLARE C1 CURSOR FOR S1
C/END-EXEC

C**********************
C* Open Cursor        *
C**********************
C/EXEC SQL
C+ OPEN C1 
C/END-EXEC
C*
C******************
C* Close cursor   *
C******************
C/EXEC SQL
C+  CLOSE C1
C/END-EXEC    

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LVL 16

Accepted Solution

by:
theo kouwenhoven earned 2000 total points
ID: 33743927
Hi Hi Iskibinsa,

See also this link for more info and examples, I hope it will help


http://www.mcpressonline.com/programming/sql/using-dynamic-sql-in-cl-part-1running-action-queries.html


GoodLuck,
murph
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LVL 16

Expert Comment

by:theo kouwenhoven
ID: 33783789
And does it work????
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