Re: optimizing LIKE '%2345' queries

Thanks for the suggestion. Actually I went ahead and created a reverse
function using plpgsql, created an index using reverse column and now
my queries use "where reverse(column) like reverse('%2345') and it's
using the index like i hoped it would! Now if I could figure out how
to optimize like '%2345%' queries. I don't want to create many
indexes though the table is very write heavy.

> > Is the only way to create a reverse function and create an index using
> > the reverse function and modify queries to use:
> >
> > where reverse(column) like reverse('%2345') ?
>
> Hmm.. interesting.
> If (and only if) the records stored in "column" column have fixed
> length (say, all are 50 characters in length) you could create and index
> on, say, substring(column,45,50), and use this in the WHERE clauses in
> your queries.
> Or if the length of those records is not the same maybe it is
> feasible to create an ondex on substring(column, length(column)-5,
> length(column)).
>
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