Insert into ASE11.9 writes '' as ' '!? Why?

We are using Sybase Adaptive Server Enterprise as Backend for our Microsoft
Access 97 Application.

Every '' (empty string) inserted into a varchar column results in a ' '
(string with one blank) value. This happens even if we insert the record by
typing into SQL Advantage.

Manfred Sorg
msorg@swt.de


0
Manfred
3/4/1999 7:22:28 PM
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This behaviour is documented, and has been this way for many years.

Try the following for example:

1> select "a" + "" + "b"
2> go
 ---
 a b

1> select char_length("")
2> go
 -----------
           1

You could use the following (works in 11.9 at least) :

1> select "a" + ltrim("") + "b"
2> go
 ---
 ab

HTH,

Rob
--
----------------------------------------------------------------------
Rob Verschoor

Certified Sybase ASE 11.5 Administrator (Professional)
Certified DBA/Performance & Tuning Specialist for Sybase System 11

email rob@sypron.nl.*No*Spam*Please*
WWW www.euronet.nl/~syp_rob
snail Sypron B.V., P.O.Box 10695, 2501HR Den Haag, The Netherlands
----------------------------------------------------------------------

Manfred Sorg wrote in message ...
>We are using Sybase Adaptive Server Enterprise as Backend for our Microsoft
>Access 97 Application.
>
>Every '' (empty string) inserted into a varchar column results in a ' '
>(string with one blank) value. This happens even if we insert the record by
>typing into SQL Advantage.
>
>Manfred Sorg
>msorg@swt.de
>
>




0
Rob
3/4/1999 7:42:29 PM
>Every '' (empty string) inserted into a varchar column results in a ' '
>(string with one blank) value. This happens even if we insert the record by
>typing into SQL Advantage.

It's been that way for many many years. There is no such thing as an "empty"
string in the server. The string can be null, or it can be a single space;
there is no in-between. When the front-end tries to insert a '' (zero-length
string) it gets transformed not to a null but to a ' ' (single space).

- John.





0
John
3/4/1999 7:53:12 PM
Reply:

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