Solved

Oracle sequence number ODBC problem

Posted on 2002-05-16
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Last Modified: 2008-03-10
I'm trying to get the next sequence number from an Oracle sequence with:

SELECT WRV.WRV_SEQ_ADRESSEN.NEXTVAL FROM DUAL

This works fine with the Oracle ODBC drivers from Oracle, but not with those from microsoft. Miscrosoft gives an "value out of range" error (error 22003) for sequences with high numbers.

I checked the ODBC trace for both drivers and it appears that the Microsft versions see the NEXTVAL column as a SQL_C_SHORT (5 positions) where Oracle sees it as a SQL_C_DOUBLE (8 positions).

Unofrtunately the target machine has only Microsoft ODBC drivers so I'm stuck with those.

How do I tell the Microsoft ODBC driver for Oracle to use a larger datatayp for the NEXTVAL column?

How can I instruct
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Question by:patrickl
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4 Comments
 
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Accepted Solution

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Guy Hengel [angelIII / a3] earned 200 total points
ID: 7013390
You can cast the value to varchar datatype:

SELECT to_char(WRV.WRV_SEQ_ADRESSEN.NEXTVAL) FROM DUAL

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by:patrickl
ID: 7013397
Cool, that works! I was trying something like that, but no luck. Great!

Do you have an idea why this goes wrong at all?
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LVL 143

Expert Comment

by:Guy Hengel [angelIII / a3]
ID: 7013399
the ODBC drivers have different data type representations, and while the ORACLE driver knows the data types, the one of MS does some kind of approximation :-(
Glad I could help.
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by:patrickl
ID: 7013413
I guess ODBC is just a minefield. I always keep running into trouble with it. The oracle drivers never seem to install and the Microsoft ones don't always work.

But anyway, many thanks.

Just to be complete. I change the query to:

SELECT to_char(WRV.WRV_SEQ_ADRESSEN.NEXTVAL) AS NEXTVAL FROM DUAL

To make it equivalent to the one I had before. Works like a charm.
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