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IDS Forum

RE: ODBC and Serial

Posted By:
Date:

There is a slow, undocumented and unrecommended way to get
the serial value for the table not using 'dbinfo'

1. select partnum from systables
where tabname = 'MYTAB' (into PRTNUM)
2. select serialv from sysmaster:sysptnhdr
where partnum = PRTNUM

Note, that this method is not recommended if
this table is heavily loaded by inserts

Formally, Informix keeps serial value for the table
in the 'tablespace tablespace' - special disk structure that
describes each partition (index or table fragment) in the dbspace.

------------------------------------------
Alexey Sonkin
Senior Database Administrator


-----Original Message-----
From: Christine N.... [mailto:cnormile@us.ibm.com]
Sent: Friday, April 25, 2003 2:16 PM
To: ids@iiug.org
Subject: Re: ODBC and Serial [1000]





A serial column is not a sequence object. The value does not exist outside
the context of the row. Sequence objects have been added to IDS with
version 9.4. With earlier versions of IDS, developers get the next
sequential value for a column in one of two ways: write a dummy row in the
table containing the serial field, read it back and then update it when the
rest of the data is gathered or create a table containing single row with
the next available number, read and update that table and use the value as
if it were a sequence.

Christine Normile
I/T Specialist, Informix Solutions
Data Management Worldwide Sales Support
Telephone: 877-252-5399 T/L 273-0981
Mobile: 210-365-5073



|---------+---------------------------->
| | "THOMAS CARISCH" |
| | <tcarisch@paninfo|
| | .com> |
| | Sent by: |
| | forum.subscriber@|
| | iiug.org |
| | |
| | |
| | 04/25/2003 08:15 |
| | AM |
|---------+---------------------------->

>---------------------------------------------------------------------------
-------------------------------------------|
|
|
| To: ids@iiug.org
|
| cc:
|
| Subject: ODBC and Serial [994]
|

>---------------------------------------------------------------------------
-------------------------------------------|




Hello to you all,

does anybody know the way to retrieve the current SERIAL value thru ODBC.
The sqlca.sqerrd[x] isn't supported by ODBC!?
We use a VB application and need that value for preparing the next select
in our program.
Unfortunately there doesn't exist a SQL-function like nextval() and so on
how e.g IBM UDB does for their identity columns.

Any ideas?

Thank's for help
Thomas




Messages In This Thread

  • ODBC and Serial
    THOMAS CARISCH -- Friday, 25 April 2003, at 9:15 a.m.
    • Re: ODBC and Serial
      Christine Normile -- Friday, 25 April 2003, at 3:15 p.m.
      • RE: ODBC and Serial
        Alexey Sonkin -- Friday, 25 April 2003, at 6:07 p.m.

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