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Search housenumbers with unknown address parts by housenumber term

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House numbers need special handling because they may appear after
the street term. That means we canot just use them as the main name
for searches where the address has its own search term entries.
Doing this right now, we are able to find '40, Main St, Town' but not
'Main St 40, Town'.

This switches to using the housenumber token as the name term instead.
House number tokens can get special handling when building the search
query that covers the case where they come after the street.

The main disadvantage is that this once more increases the numbers
of possible search interpretation of which we have already too many.

no penalty for housenumber searches
This commit is contained in:
Sarah Hoffmann
2020-11-19 12:06:53 +01:00
parent f21853ea9d
commit 22800d7d59
5 changed files with 132 additions and 45 deletions
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45
sql/functions/normalization.sql
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@@ -490,53 +490,34 @@ BEGIN
END LOOP;
END IF;
-- If the POI is named, simply mix in all address terms and be done.
IF array_length(initial_name_vector, 1) is not NULL THEN
-- Cheating here by not recomputing all terms but simply using the ones
-- from the parent object.
name_vector := initial_name_vector;
nameaddress_vector := array_merge(nameaddress_vector, parent_name_vector);
nameaddress_vector := array_merge(nameaddress_vector, parent_address_vector);
IF not address ? 'street' and address ? 'place' THEN
-- make sure addr:place terms are always searchable
nameaddress_vector := array_merge(nameaddress_vector,
addr_ids_from_name(address->'place'));
END IF;
RETURN;
END IF;
----- unnamed POIS
IF (array_length(nameaddress_vector, 1) is null
and (address ? 'street'or not address ? 'place'))
or housenumber is null
THEN
RETURN;
END IF;
name_vector := initial_name_vector;
-- Check if the parent covers all address terms.
-- If not, create a search name entry with the house number as the name.
-- This is unusual for the search_name table but prevents that the place
-- is returned when we only search for the street/place.
IF not nameaddress_vector <@ parent_address_vector THEN
name_vector := ARRAY[getorcreate_name_id(housenumber)];
IF housenumber is not null and not nameaddress_vector <@ parent_address_vector THEN
name_vector := array_merge(name_vector,
ARRAY[getorcreate_housenumber_id(make_standard_name(housenumber))]);
END IF;
IF not address ? 'street' and address ? 'place' THEN
addr_place_ids := addr_ids_from_name(address->'place');
IF not addr_place_ids <@ parent_name_vector THEN
-- addr:place tag exists without a corresponding place. Mix in addr:place
-- in the address.
name_vector := ARRAY[getorcreate_name_id(housenumber)];
-- make sure addr:place terms are always searchable
nameaddress_vector := array_merge(nameaddress_vector, addr_place_ids);
-- If there is a housenumber, also add the place name as a name,
-- so we can search it by the usual housenumber+place algorithms.
IF housenumber is not null THEN
name_vector := array_merge(name_vector,
ARRAY[getorcreate_name_id(make_standard_name(address->'place'))]);
END IF;
END IF;
END IF;
-- Merge the parent name and address.
-- Cheating here by not recomputing all terms but simply using the ones
-- from the parent object.
nameaddress_vector := array_merge(nameaddress_vector, parent_name_vector);
nameaddress_vector := array_merge(nameaddress_vector, parent_address_vector);