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use import date from osm2pgsql property table if available

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Sarah Hoffmann
2024-03-05 11:33:32 +01:00
parent 247065ff6f
commit ae7c584e28
3 changed files with 38 additions and 10 deletions
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17
nominatim/db/status.py
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@@ -29,11 +29,24 @@ class StatusRow(TypedDict):
indexed: Optional[bool]
def compute_database_date(conn: Connection) -> dt.datetime:
def compute_database_date(conn: Connection, offline: bool = False) -> dt.datetime:
""" Determine the date of the database from the newest object in the
data base.
"""
# First, find the node with the highest ID in the database
# If there is a date from osm2pgsql available, use that.
if conn.table_exists('osm2pgsql_properties'):
with conn.cursor() as cur:
cur.execute(""" SELECT value FROM osm2pgsql_properties
WHERE property = 'current_timestamp' """)
row = cur.fetchone()
if row is not None:
return dt.datetime.strptime(row[0], "%Y-%m-%dT%H:%M:%SZ")\
.replace(tzinfo=dt.timezone.utc)
if offline:
raise UsageError("Cannot determine database date from data in offline mode.")
# Else, find the node with the highest ID in the database
with conn.cursor() as cur:
if conn.table_exists('place'):
osmid = cur.scalar("SELECT max(osm_id) FROM place WHERE osm_type='N'")