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Re^4: Writing It Myself, DWIM, and Expectations

by Jenda (Abbot)
on Sep 14, 2004 at 23:12 UTC ( #391014=note: print w/ replies, xml ) Need Help??

in reply to Re^3: Writing It Myself, DWIM, and Expectations
in thread Writing It Myself, DWIM, and Expectations

I can't check it at this moment, but I don't think any recent MS SQL (that is 7.0 and up) does this for varchars. I'm sure I would notice. It does change an empty string to a string containing the right number of spaces for char(N) columns, but there it can't do anything better. If I still remember this node tomorrow when I am at work and can try things I'll test it and post an update.

Update: Yep, I was right:

create table foo (svarchar varchar(10), schar char(10)) insert into foo (svarchar, schar) values ('', '') insert into foo (schar) values ('') select '>' + svarchar + '<', '>' + schar + '<' from foo

Always code as if the guy who ends up maintaining your code will be a violent psychopath who knows where you live.
   -- Rick Osborne

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Re^5: Writing It Myself, DWIM, and Expectations
by Anonymous Monk on Oct 09, 2004 at 07:28 UTC
    That is the very reason for varchar. And the curious behavior of SQL-92 is because there is no varchar in SQL-92. So you must define your database with char(x) fields and you get the behavior of char(x). Of course.

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