disable prepared statements

disable prepared statements

Prepared statements do not work well with the partial indexes that
Nominatim uses because all Python constants are replaced with
parameters. A query like:

  placex.select().where(placex.c.rank_address.between(4, 25)

gets translated into a prepared query with two parameters:

  SELECT * FROM placex WHERE rank_address BETWEEN %s and %s

And this does not work with a partial index of:

  CREATE INDEX on placex(geometry) WHERE rank_address between 4 and 25