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save differing linked polace names in extra fields

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This keeps the names tracable and ensures that all names are searchable
when they differ. Do not keep names when they are exactly the same
to save some space. Linked names are cleaned out before relinking.
This commit is contained in:
Sarah Hoffmann
2022-03-16 16:38:52 +01:00
parent 433d2f4c7d
commit 42cd021d04
3 changed files with 37 additions and 3 deletions
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19
lib-sql/functions/placex_triggers.sql
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@@ -26,6 +26,7 @@ CREATE OR REPLACE FUNCTION placex_indexing_prepare(p placex)
DECLARE
location RECORD;
result prepare_update_info;
extra_names HSTORE;
BEGIN
-- For POI nodes, check if the address should be derived from a surrounding
-- building.
@@ -58,8 +59,11 @@ BEGIN
END LOOP;
END IF;
-- remove internal and derived names
result.address := result.address - '_unlisted_place'::TEXT;
result.name := p.name;
SELECT hstore(array_agg(key), array_agg(value)) INTO result.name
FROM each(p.name) WHERE key not like '\_%';
result.class := p.class;
result.type := p.type;
result.country_code := p.country_code;
@@ -72,8 +76,17 @@ BEGIN
IF location.place_id is not NULL THEN
result.linked_place_id := location.place_id;
IF NOT location.name IS NULL THEN
result.name := location.name || result.name;
IF location.name is not NULL THEN
{% if debug %}RAISE WARNING 'Names original: %, location: %', result.name, location.name;{% endif %}
-- Add all names from the place nodes that deviate from the name
-- in the relation with the prefix '_place_'. Deviation means that
-- either the value is different or a given key is missing completely
SELECT hstore(array_agg('_place_' || key), array_agg(value)) INTO extra_names
FROM each(location.name - result.name);
{% if debug %}RAISE WARNING 'Extra names: %', extra_names;{% endif %}
result.name := location.name || result.name || extra_names;
{% if debug %}RAISE WARNING 'Final names: %', result.name;{% endif %}
END IF;
END IF;