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From: Adrian Klaver <[email protected]>
To: Igor Korot <[email protected]>
To: David G. Johnston <[email protected]>
Cc: Rob Sargent <[email protected]>
Cc: pgsql-generallists.postgresql.org <[email protected]>
Subject: Re: How to properly use TRIM()?
Date: Sat, 7 Mar 2026 13:29:07 -0800
Message-ID: <[email protected]> (raw)
In-Reply-To: <CA+FnnTy5Fc5WdM=yPSL7bBDrGYHD2aQTwGbFZFuv9dHm_AAgGA@mail.gmail.com>
References: <CA+FnnTwxSeLhR8zNZsoR2SAXYVf9Db+zi3+SpPqdBe==m3X-AQ@mail.gmail.com>
	<[email protected]>
	<CA+FnnTznxpXh8nAJhjnggpfYz0MEnEdK89FtejDNTmX87MktiA@mail.gmail.com>
	<CAKFQuwYaVKcMU0wP3SAbct8FU0H4iy=E1HxxBY-gcvmoK-GsrQ@mail.gmail.com>
	<CA+FnnTy5Fc5WdM=yPSL7bBDrGYHD2aQTwGbFZFuv9dHm_AAgGA@mail.gmail.com>

On 3/7/26 12:46 PM, Igor Korot wrote:
> Hi, David,
> 
> On Sat, Mar 7, 2026 at 12:03 PM David G. Johnston 
> <[email protected] <mailto:[email protected]>> wrote:
> 
>     On Sat, Mar 7, 2026 at 12:58 PM Igor Korot <[email protected]
>     <mailto:[email protected]>> wrote:
> 
>         So I started looking for a way to return SQL_NO_DATA
>         on that 4th column...
> 
> 
>     Doesn't "No Data" refer to the result set as a whole, not individual
>     columns?  I'd assume NULL is detected some other way.
> 
> 
> No, I think it’s column based.

1) My knowledge of ODBC is limited.

2) This:

https://learn.microsoft.com/en-us/sql/odbc/reference/develop-app/return-codes-odbc?view=sql-server-v...

"SQL_NO_DATA 	No more data was available. The application calls 
SQLGetDiagRec or SQLGetDiagField to retrieve additional information. One 
or more driver-defined status records in class 02xxx may be returned. 
Note: In ODBC 2.x, this return code was named SQL_NO_DATA_FOUND."

would seem to indicate that David Johnston is correct:

'Doesn't "No Data" refer to the result set as a whole, not individual 
columns?  I'd assume NULL is detected some other way.'

> The call to SQLGetData() returns data in one column.
> 
> And as stated it successfully retrieves empty array for column 3 and 
> moves on.
> 
> Thank you.
> 
> 
>     David J.
> 


-- 
Adrian Klaver
[email protected]

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