Re: proposal: support empty string as separator for string_to_array

On Fri, Jul 24, 2009 at 11:40 PM, Pavel Stehule<pavel(dot)stehule(at)gmail(dot)com> wrote:
> Hello
>
> I have one idea, that should simplify string to char array
> transformation. The base is idea: between every char is empty string,
> so empty string is regular separator for string_to_array function.
> This behave is inversion of array_to_string function behave:
>
> postgres=# select array_to_string(array['a','b','c'],'');
>  array_to_string
> -----------------
>  abc
> (1 row)
>
> postgres=# select string_to_array('abc','');
>  string_to_array
> -----------------
>  {a,b,c}
> (1 row)

postgres=# select regexp_split_to_array('abc', '');
regexp_split_to_array
-----------------------
{a,b,c}
(1 row)

:-)

merlin