Tim Smith wrote:
> Is there a more efficient way to pattern match integer columns other
> than something like :
>
> where cast(mynumber as text) ~ '.*123.*'
>
>
> I also seem to recall you can't create indexes on casts either ?
I don't think you can do this without converting the column to a string.
I guess that you can create an index if the cast function is immutable;
at any rate you can create an index on intcolumn::text.
But such an index would not help you with a query like the one you
show above. The only thing that could speed up such a query would
be a trigram index on the string representation of the value.
Yours,
Laurenz Albe
