Re: [SQL] Expr Abbreviations/Functions?

Kenneth,

You could merge the fields and search with :

select * from tablex where lower(f1||f2||f3) ~ 'foo';

Troy

Troy Korjuslommi Tksoft OY, Inc.
tjk(at)tksoft(dot)com Software Development
Open Source Solutions
Hosting Services

>
> I find myself frequently typing (postgresql-6.5.1) the following:
>
> SELECT * FROM table
> WHERE (f1 ~* 'foo' OR f2 ~* 'foo' OR f3 ~* 'foo');
>
> Can "CREATE FUNCTION" be used? Something like
>
> CREATE FUNCTION f(string)
> RETURNS bool
> AS '(f1 ~* '$1' OR f2 ~* '$1' ...)';
>
> and then type
>
> SELECT * FROM table WHERE f('foo');
>
>
> I tried to define such a function, but encountered two problems:
>
> o It didn't "accept" the function's definition
>
> o Syntax errors (apostrophes need escaping ... I tried mixing quotes
> and apostrophes, also using '\' chars ... nothing seemed to work)
>
>
> I know that I can define VIEWs (and FUNCTIONs) that contain a specific
> SELECT statement, but I'd prefer to have definitions of just the
> repeating expressions.
>
>
> Another thing I'd like to "abbreviate" is the second phrase in
> SELECTs. E.g,
>
> SELECT x FROM table;
>
> instead of
>
> SELECT x1,x2,x3 FROM table;
>
> where 'x' is somehow equivalent to 'x1,x2,x3'.
>
>
> I read the online docs and searched a few SQL books, but can't seem to
> find the correct approach. Ideas?
>
> Thanks for any help,
>
> -Prof Kenneth H Jacker khj(at)cs(dot)appstate(dot)edu
> -Computer Science Dept www.cs.appstate.edu/~khj
> -Appalachian State Univ
> -Boone, NC 28608 USA
>
>
>
>