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IDS Forum

Re: SMALLINT equivalent in SQL Server.

Posted By: Art Kagel
Date: Wednesday, 17 October 2012, at 11:36 p.m.

In Response To: Re: SMALLINT equivalent in SQL Server. (FRANK J. COMPUTER)

Back at you, below:

Art

Art S. Kagel
Advanced DataTools (www.advancedatatools.com)
Blog: http://informix-myview.blogspot.com/

Disclaimer: Please keep in mind that my own opinions are my own opinions
and do not reflect on my employer, Advanced DataTools, the IIUG, nor any
other organization with which I am associated either explicitly,
implicitly, or by inference. Neither do those opinions reflect those of
other individuals affiliated with any entity with which I am affiliated nor
those of the entities themselves.

On Wed, Oct 17, 2012 at 10:49 PM, FRANK J. COMPUTER <frank_in_pr@hotmail.com
> wrote:

> SEE MY COMMENTS WITHIN ***
>
> > Art wrote:
> >
> > Ahh yes, I should have remembered that one, it's bitten me often enough.
> > Only Informix supports that trailing field separator and it's required
> for
> > import too! Never understood why, historical I know, it's always been
> that
> > way, but dumb. I have a very old spec on a standard for delimited data
> > files, and NO ONE actually does it correctly, but nowhere in the spec is
> a
> > trailing separator allowed. Of course, I may be one of only 10 people who
> > still remember there ever was a standard.
> > -------------------------
> >
> > 1. Didn't know a standard existed for import/export of data, other than
> > CSV.
> >
>
> Yup, several actually, but even the CSV standard is not followed by any
> software out there. The closest to come to compliance was a card-oriented
> database in the early '90s that's long gone. Among other things everyone
> misses is a requirement for all "text" type fields to be quoted with double
> quotes. Most systems do not write the quotes when they create delimited or
> CSV files, many also do not process them properly - including the quotes in
> the parsed data instead of treating them as delimiters. Xcel and Open
> Office Calc handle the import OK (except that they do not automatically
> assign numeric attributes to fields that are not quoted), but don't quote
> properly on output. <sigh>
>
> *** card-oriented db like "Tracker"?.. So, has any industry attempt been
> made
> to create an import/export standard? ***
>

The product I was thinking of was called DataEase, which apparently is
still around. IIRC they even supported both optional header records
(Excell supports the column name record but not the datatype header record).

The delimited file, or CSV file, standard was supposed to be that
standard. Then case tagged entry format which was adopted by the financial
industry and is still the basis of the EDI (Electronic Data Interchange)
format standard that the banking industry still uses AFAIK. That was
followed by the XML standard. So, yes, many attempts.

>
> > 2. So how can I tell Informix to suppress the trailing delimiter?
> >
>
> You cannot, though it's not the engine, but the tools like dbaccess and
> dbexport that are producing the export file. You have to strip out the
> trailing delimiter as a post-process. Here's a sed script for that if it
> helps:
>
> sed 's/|$//' <infile >outfile
>
> Another option would be to use Jonathan Leffler's sqlcmd package which can
> produce a fairly compliant CSV file without the trailing delimiter.
> However, I don't know if it will still work with and SE database.
>
> *** Thanks for the sed script!.. It would be a good idea to add a "WITH NO
> TRAILING DELIMITER" directive to the dbaccess UNLOAD statement. ***
>

Would be nice. Call tech support or go to online support and enter a
feature request.

>
> 3. The SMALLINT value is in between other values, example:
> > ABC|32766|10172012|
> >
>
> So you ultimately want the record to look like: ABS|32766|10172012
>
> *** YES ***
>
> Note that while I understand that this was a hand carved sample, 32766
> isn't a valid SMALLINT, though it would be a valid INTEGER. ;-)
>
> *** Even though I'm trying to load 32766 into an INTEGER column, why would
> 32766 be an invalid SMALLINT value if overflow does not occur until a
> value is
> >= 32768? ***
>

Senior moment triggered by the fact that many Informix 16bit data
strucgtures internally have a maximum value of 32765 - DUH! 8^(

>
> > 4. The SQLS import did not fail on the first line read.
> >
>
> Right, because it got confused by the trailing delimiter into thinking that
> a new record had started with an record delimiter character embedded in the
> second field. IIRC SQLS has you define the number of columns in the data
> file and so, contrary to the standard which would require it to obey the
> record delimiter and either ignore the extra column implied by the trailing
> delimiter or declare an error condition, it assumed that once it had parsed
> the Nth data filed a new record was starting even though it had not found a
> record delimiter yet. That's the other major "bug" in most delimited file
> processors.
>
> *** Your explanation absolutely makes sense! ***
>

We aim to please. B^)

>
>
>
> *******************************************************************************
> Forum Note: Use "Reply" to post a response in the discussion forum.
>
>

--14dae93406d7c661fe04cc4d161c

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