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IDS Forum

Re: Informix 12 Unicode

Posted By: Fernando Nunes
Date: Wednesday, 22 October 2014, at 9:24 a.m.

In Response To: Re: Informix 12 Unicode (Martin Fuerderer)

Martin pointed out that by using the function he mentioned,
ifx_gl_mb_loc_max() you may get the information you're looking for.
But that assumes you either used SQL_LOGICAL_CHAR or you manually
calculated the byte size for the specific columns using the same logic.

So for example, if you're using a column for names called customer_name,
and you want o allow names with 80 characters, you could create a
VARCHAR(160) or VARCHAR(240) column (assuming either 2 or 3 bytes per
character).
Then if you get the byte length using hte usual interface and divide it by
the result of ifx_gl_mb_loc_max() you should get the 80 characters...
A bit tricky but possible.... Naturally you could wrap this into a frindly
developer function....

The function mentioned is from GLS API. I think it's usuable from the
engine side (SQL) if we create a C wrapper function.... Would have to test
it.

Regards.

On Wed, Oct 22, 2014 at 11:41 AM, Martin Fuerderer <MARTINFU@de.ibm.com>
wrote:

> Hi,
>
> you may use function ifx_gl_mb_loc_max() in
> an application to determine, how "wide" a
> character can be in the current locale.
>
> Regards, Martin
> --
> Martin Fuerderer
> IBM Informix Development Munich, Germany
> Information Management
>
> Read about the Informix Warehouse Accelerator:
> http://tinyurl.com/the-iwa-blog
>
> IBM Deutschland Research & Development GmbH
> Chairman of the Supervisory Board: Martina Koederitz
> Board of Management: Dirk Wittkopp
> Corporate Seat: Boeblingen, Germany
> Reg.-Gericht: Amtsgericht Stuttgart, HRB 243294
>
> From: "MATTI JAATINEN" <matti.jaatinen@norelco.fi>
> To: ids@iiug.org
> Date: 10/22/2014 10:14
> Subject: Re: Informix 12 Unicode [34012]
> Sent by: ids-bounces@iiug.org
>
> Hi,
>
> http://www.iiug.org/forums/ids/index.cgi/read/34002
>
> Char_length return length of the characters in data not the length of
> column. Example you have
>
> column sar1 char(5) and there is row which data is '44'.
> Char_length(sar1)
> return 3 pecause there is 3 characters in that row. Length(sar1) return 4
> pecause there is 4 bytes in that row.
>
> The problem is how to determine how many characted can be put into the
> column
> sar1. Informix reports column size as byte-size so i appears that there is
>
> enought space for 5 characters, but when we use myltibyte characters eq.
> '&#39740;' there can be put only 1-characted into column sar1.
>
>
>
> *******************************************************************************
>
> Forum Note: Use "Reply" to post a response in the discussion forum.
>
>
>
> *******************************************************************************
> Forum Note: Use "Reply" to post a response in the discussion forum.
>
>

--
Fernando Nunes
Portugal

http://informix-technology.blogspot.com
My email works... but I don't check it frequently...

--047d7bdc184a0f3bdf050602dedc

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