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Improved performance of the postcodes query and some code cleaning

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This commit is contained in:
AntoJvlt
2021-06-12 15:46:08 +02:00
parent ddf866c4c7
commit 3676310efe
3 changed files with 5 additions and 8 deletions
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2
nominatim/clicmd/refresh.py
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@@ -61,7 +61,7 @@ class UpdateRefresh:
args.threads or 1)
indexer.index_postcodes()
else:
LOG.error("The place table doesn\'t exists. " \
LOG.error("The place table doesn\'t exist. " \
"Postcode updates on a frozen database is not possible.")
if args.word_counts:

10
nominatim/tools/postcodes.py
View File

@@ -165,15 +165,13 @@ def update_postcodes(dsn, project_dir, tokenizer):
with conn.cursor(name="placex_postcodes") as cur:
cur.execute("""
SELECT cc as country_code, pc, ST_X(centroid), ST_Y(centroid)
FROM (
SELECT
FROM (SELECT
COALESCE(plx.country_code, get_country_code(ST_Centroid(pl.geometry))) as cc,
token_normalized_postcode(pl.address->'postcode') as pc,
COALESCE(ST_Centroid(ST_Collect(plx.centroid)), ST_Centroid(ST_Collect(ST_Centroid(pl.geometry)))) as centroid
FROM place AS pl LEFT OUTER JOIN placex AS plx ON pl.osm_id = plx.osm_id AND pl.osm_type = plx.osm_type
ST_Centroid(ST_Collect(COALESCE(plx.centroid, ST_Centroid(pl.geometry)))) as centroid
FROM place AS pl LEFT OUTER JOIN placex AS plx ON pl.osm_id = plx.osm_id AND pl.osm_type = plx.osm_type
WHERE pl.address ? 'postcode' AND pl.geometry IS NOT null
GROUP BY cc, pc
) xx
GROUP BY cc, pc) xx
WHERE pc IS NOT null AND cc IS NOT null
ORDER BY country_code, pc""")