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add migration to backfill missing importance values

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This commit is contained in:
Sarah Hoffmann
2026-03-09 10:10:28 +01:00
parent 7a8a09ca78
commit cd84386004
2 changed files with 19 additions and 2 deletions
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19
src/nominatim_db/tools/migration.py
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@@ -14,7 +14,7 @@ from ..errors import UsageError
from ..config import Configuration
from ..db import properties
from ..db.connection import connect, Connection, \
table_exists, register_hstore
table_exists, register_hstore, table_has_column
from ..db.sql_preprocessor import SQLPreprocessor
from ..version import NominatimVersion, NOMINATIM_VERSION, parse_version
from ..tokenizer import factory as tokenizer_factory
@@ -420,3 +420,20 @@ def create_place_interpolation_table(conn: Connection, config: Configuration, **
SET type = coalesce(address->'interpolation', 'all'),
address = address - 'interpolation'::TEXT;
""")
@_migration(5, 2, 99, 4)
def backfill_importance(conn: Connection, **_: Any) -> None:
""" Backfill missing importance values.
"""
conn.execute("""UPDATE placex
SET importance = 0.40001 - (rank_search::float / 75)
WHERE importance is NULL OR importance <= 0
""")
if table_exists(conn, 'search_name')\
and table_has_column(conn, 'search_name', 'search_rank'):
conn.execute("""UPDATE search_name
SET importance = 0.40001 - (search_rank::float / 75)
WHERE importance is NULL OR importance <= 0
""")
conn.execute("ALTER TABLE search_name DROP COLUMN search_rank")

2
src/nominatim_db/version.py
View File

@@ -55,7 +55,7 @@ def parse_version(version: str) -> NominatimVersion:
return NominatimVersion(*[int(x) for x in parts[:2] + parts[2].split('-')])
NOMINATIM_VERSION = parse_version('5.2.99-3')
NOMINATIM_VERSION = parse_version('5.2.99-4')
POSTGRESQL_REQUIRED_VERSION = (12, 0)
POSTGIS_REQUIRED_VERSION = (3, 0)