Re: PG SQL and LIKE clause

Is this a possibility?

From
https://www.postgresql.org/docs/current/functions-matching.html#FUNCTIONS-POSIX-REGEXP
-

~ 'ali[ ]*$' matches strings ending in ali that have zero of more spaces
after ali

this would match

'bali'
'ali'
'ali '
'bali '

If you need full string then it would be like this

~ '^ali[ ]*$' matches string only containing ali plus zero or more spaces
after ali

this would match

'ali'
'ali '

but not match

'bali'
'bali '

Also switching ~* for ~ makes if case insensitive if necessary.

John

On Thu, Sep 12, 2019 at 10:29 PM Matthias Apitz <guru(at)unixarea(dot)de> wrote:

>
> Hello,
>
> We're porting a huge Library Management System, written using all kind
> of languages one can think of (C, C++, ESQL/C, Perl, Java, ...) on Linux
> from the DBS Sybase to PG, millions of lines of code, which works also
> with DBS Oracle and in the past with INFORMIX-SE and -ONLINE.
>
> We got to know that in CHAR columns with trailing blanks a
>
> SELECT ... FROM ... WHERE name LIKE 'Ali'
>
> does not match in 'name' having 'Ali '.
>
> I glanced through our code with grep pipelines and found some hundred
> places which would be affected by this problem. I'm not interested in a
> religious discussion if or if not this behaviour of PG is correcter or
> better than in Sybase. It's just different to Sybase.
>
> Any hints to address this problem? Or is there any compile time option
> for the PG server to address this?
>
> Thanks
>
> matthias
> --
> Matthias Apitz, ✉ guru(at)unixarea(dot)de, http://www.unixarea.de/
> +49-176-38902045
> Public GnuPG key: http://www.unixarea.de/key.pub
>
> Mientras haya voluntad de lucha habrá esperanza de vencer.
>
>
>