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IDS Forum

Re: LVARCHAR

Posted By: Art S. Kagel (Oninit)
Date: Tuesday, 18 March 2008, at 10:24 p.m.

In Response To: LVARCHAR (SUNITA RAINA)

SUNITA RAINA wrote:
> Hi,
>

This one pops up every few months: LVARCHAR, BINARY, BOOLEAN, and a few
other 'built-in' data types are implemented as UDTs. Prior to IDS 9.40
you could not use User Defined Types (UDTs) in distributed queries
between databases even if both databases resided in the same instance,
IMS. As of 9.40 it is possible to use UDTs across databases within the
same instance but not between databases in different instances. In 11.10
and persumable later versions it is finally possible to use built-in and
system specific UDTs in distributed queries across instances, so long as
the UDT is defined on the local server executing the query. The
following from the introduction to the 11.10xC2 manuals:

*Enhanced Data-Type and UDR Support in Cross-Server Distributed

Operations

*

Earlier releases of Informix® Dynamic Server restricted the remote

execution of UDRs in databases of other Dynamic Server instances to

SPL routines that the EXECUTE FUNCTION or EXECUTE PROCEDURE

statement invoke explicitly, and to SPL routines that queries and

other DML operations invoked implicitly. This release extends

support for UDRs in cross-database and cross-server distributed

operations to most contexts where a UDR is valid in the local

database. In addition, external routines written in the C or Java™

languages are now valid in any distributed operation where an SPL

routine is valid. This release also extends the data types that are

valid as parameters or return values of cross-server UDRs, which

were formerly restricted to non-opaque built-in SQL data types, by

supporting these additional data types: – BOOLEAN – LVARCHAR –

DISTINCT of built-in types that are not opaque – DISTINCT of BOOLEAN

– DISTINCT of LVARCHAR – DISTINCT of the DISTINCT types listed

above. These data types can be returned by SPL, C, or Java language

UDRs that use these data types as parameters or as return values, if

the UDRs are defined in all the participating databases. Any

implicit or explicit casts defined over these data types must be

duplicated across all the participating Dynamic Server instances.

The DISTINCT data types must have exactly the same data type

hierarchy defined in all databases that participate in the

distributed query.

> I am running this query and I am getting this error which does not make sense.
> THis query has a column cnote_desc LVARCHAR (10000). And I am trying to run
> this query from one instance to another instance on same server. We are on IDS
> 10.0 FC7 and HP-UX 11.11. If I run this query without cnote_desc column it
> works fine. So something to do with LVARCHAR that does not go across
> databases....I think.
>
> SELECT cnote_id, body_loc_cd, cnote_typ_cd, event_dt, event_tm , critical_flg,
> prnt_ok_flg, updt_usr_id, updt_dt,cnote_desc FROM cis@online15:cnote
>
> SQL Error (-999): Not implemented yet.
>
> Thanks,
> Sunita
>

Art S. Kagel
Oninit

>
>

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Messages In This Thread

  • LVARCHAR
    SUNITA RAINA -- Tuesday, 18 March 2008, at 6:43 p.m.
    • Re: LVARCHAR
      Art S. Kagel (Oninit) -- Tuesday, 18 March 2008, at 10:24 p.m.
      • Re: LVARCHAR
        Art S. Kagel (Oninit) -- Tuesday, 18 March 2008, at 10:58 p.m.

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