While prefix expression y like 'abc%'
can be converted to y >= 'abc' (see expand_indexqual_opclause()), I'm not sure any kind of expansion is possible for '%abc%' which would result in a b-tree searchable condition. Jeff Janes <jeff.ja...@gmail.com> wrote: > Is there a fundamental reason the filter on y is not being applied to > the index scan, rather than the heap scan? -- Antonin Houska Cybertec Schönig & Schönig GmbH Gröhrmühlgasse 26 A-2700 Wiener Neustadt Web: http://www.postgresql-support.de, http://www.cybertec.at -- Sent via pgsql-hackers mailing list (pgsql-hackers@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-hackers
