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streamline SQLAlchemy DB schema

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Remove all information not strictly used by the frontend as well as
any index information. This will make it easier to create a SQLite
database from the schema.
This commit is contained in:
Sarah Hoffmann
2023-10-11 11:30:42 +02:00
parent 1255efba7f
commit d9d0e70e5b
1 changed files with 12 additions and 14 deletions
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26
nominatim/db/sqlalchemy_schema.py
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@@ -41,6 +41,9 @@ class SqliteTypes:
#pylint: disable=too-many-instance-attributes
class SearchTables:
""" Data class that holds the tables of the Nominatim database.
This schema strictly reflects the read-access view of the database.
Any data used for updates only will not be visible.
"""
def __init__(self, meta: sa.MetaData, engine_name: str) -> None:
@@ -63,14 +66,13 @@ class SearchTables:
sa.Column('value', sa.Text))
self.placex = sa.Table('placex', meta,
sa.Column('place_id', sa.BigInteger, nullable=False, unique=True),
sa.Column('place_id', sa.BigInteger, nullable=False),
sa.Column('parent_place_id', sa.BigInteger),
sa.Column('linked_place_id', sa.BigInteger),
sa.Column('importance', sa.Float),
sa.Column('indexed_date', sa.DateTime),
sa.Column('rank_address', sa.SmallInteger),
sa.Column('rank_search', sa.SmallInteger),
sa.Column('partition', sa.SmallInteger),
sa.Column('indexed_status', sa.SmallInteger),
sa.Column('osm_type', sa.String(1), nullable=False),
sa.Column('osm_id', sa.BigInteger, nullable=False),
@@ -88,33 +90,31 @@ class SearchTables:
sa.Column('centroid', Geometry))
self.addressline = sa.Table('place_addressline', meta,
sa.Column('place_id', sa.BigInteger, index=True),
sa.Column('address_place_id', sa.BigInteger, index=True),
sa.Column('place_id', sa.BigInteger),
sa.Column('address_place_id', sa.BigInteger),
sa.Column('distance', sa.Float),
sa.Column('cached_rank_address', sa.SmallInteger),
sa.Column('fromarea', sa.Boolean),
sa.Column('isaddress', sa.Boolean))
self.postcode = sa.Table('location_postcode', meta,
sa.Column('place_id', sa.BigInteger, unique=True),
sa.Column('place_id', sa.BigInteger),
sa.Column('parent_place_id', sa.BigInteger),
sa.Column('rank_search', sa.SmallInteger),
sa.Column('rank_address', sa.SmallInteger),
sa.Column('indexed_status', sa.SmallInteger),
sa.Column('indexed_date', sa.DateTime),
sa.Column('country_code', sa.String(2)),
sa.Column('postcode', sa.Text, index=True),
sa.Column('postcode', sa.Text),
sa.Column('geometry', Geometry))
self.osmline = sa.Table('location_property_osmline', meta,
sa.Column('place_id', sa.BigInteger, nullable=False, unique=True),
sa.Column('place_id', sa.BigInteger, nullable=False),
sa.Column('osm_id', sa.BigInteger),
sa.Column('parent_place_id', sa.BigInteger),
sa.Column('indexed_date', sa.DateTime),
sa.Column('startnumber', sa.Integer),
sa.Column('endnumber', sa.Integer),
sa.Column('step', sa.SmallInteger),
sa.Column('partition', sa.SmallInteger),
sa.Column('indexed_status', sa.SmallInteger),
sa.Column('linegeo', Geometry),
sa.Column('address', self.types.Composite),
@@ -125,7 +125,6 @@ class SearchTables:
sa.Column('country_code', sa.String(2)),
sa.Column('name', self.types.Composite),
sa.Column('derived_name', self.types.Composite),
sa.Column('country_default_language_code', sa.Text),
sa.Column('partition', sa.Integer))
self.country_grid = sa.Table('country_osm_grid', meta,
@@ -135,12 +134,12 @@ class SearchTables:
# The following tables are not necessarily present.
self.search_name = sa.Table('search_name', meta,
sa.Column('place_id', sa.BigInteger, index=True),
sa.Column('place_id', sa.BigInteger),
sa.Column('importance', sa.Float),
sa.Column('search_rank', sa.SmallInteger),
sa.Column('address_rank', sa.SmallInteger),
sa.Column('name_vector', self.types.IntArray, index=True),
sa.Column('nameaddress_vector', self.types.IntArray, index=True),
sa.Column('name_vector', self.types.IntArray),
sa.Column('nameaddress_vector', self.types.IntArray),
sa.Column('country_code', sa.String(2)),
sa.Column('centroid', Geometry))
@@ -150,6 +149,5 @@ class SearchTables:
sa.Column('startnumber', sa.Integer),
sa.Column('endnumber', sa.Integer),
sa.Column('step', sa.SmallInteger),
sa.Column('partition', sa.SmallInteger),
sa.Column('linegeo', Geometry),
sa.Column('postcode', sa.Text))