"""
Custom functions and expressions for SQLAlchemy.
"""
+from __future__ import annotations
+from typing import Any
import sqlalchemy as sa
+from sqlalchemy.ext.compiler import compiles
-def select_index_placex_geometry_reverse_lookuppolygon(table: str) -> 'sa.TextClause':
- """ Create an expression with the necessary conditions over a placex
- table that the index 'idx_placex_geometry_reverse_lookupPolygon'
- can be used.
+from nominatim.typing import SaColumn
+
+# pylint: disable=all
+
+class PlacexGeometryReverseLookuppolygon(sa.sql.functions.GenericFunction[Any]):
+ """ Check for conditions that allow partial index use on
+ 'idx_placex_geometry_reverse_lookupPolygon'.
+
+ Needs to be constant, so that the query planner picks them up correctly
+ in prepared statements.
"""
- return sa.text(f"ST_GeometryType({table}.geometry) in ('ST_Polygon', 'ST_MultiPolygon')"
- f" AND {table}.rank_address between 4 and 25"
- f" AND {table}.type != 'postcode'"
- f" AND {table}.name is not null"
- f" AND {table}.indexed_status = 0"
- f" AND {table}.linked_place_id is null")
+ name = 'PlacexGeometryReverseLookuppolygon'
+ inherit_cache = True
+
+
+@compiles(PlacexGeometryReverseLookuppolygon) # type: ignore[no-untyped-call, misc]
+def _default_intersects(element: SaColumn,
+ compiler: 'sa.Compiled', **kw: Any) -> str:
+ return ("(ST_GeometryType(placex.geometry) in ('ST_Polygon', 'ST_MultiPolygon')"
+ " AND placex.rank_address between 4 and 25"
+ " AND placex.type != 'postcode'"
+ " AND placex.name is not null"
+ " AND placex.indexed_status = 0"
+ " AND placex.linked_place_id is null)")
+
+
+@compiles(PlacexGeometryReverseLookuppolygon, 'sqlite') # type: ignore[no-untyped-call, misc]
+def _sqlite_intersects(element: SaColumn,
+ compiler: 'sa.Compiled', **kw: Any) -> str:
+ return ("(ST_GeometryType(placex.geometry) in ('POLYGON', 'MULTIPOLYGON')"
+ " AND placex.rank_address between 4 and 25"
+ " AND placex.type != 'postcode'"
+ " AND placex.name is not null"
+ " AND placex.indexed_status = 0"
+ " AND placex.linked_place_id is null)")
+
+
+class IntersectsReverseDistance(sa.sql.functions.GenericFunction[Any]):
+ name = 'IntersectsReverseDistance'
+ inherit_cache = True
+
+ def __init__(self, table: sa.Table, geom: SaColumn) -> None:
+ super().__init__(table.c.geometry, # type: ignore[no-untyped-call]
+ table.c.rank_search, geom)
+ self.tablename = table.name
+
+
+@compiles(IntersectsReverseDistance) # type: ignore[no-untyped-call, misc]
+def default_reverse_place_diameter(element: SaColumn,
+ compiler: 'sa.Compiled', **kw: Any) -> str:
+ table = element.tablename
+ return f"({table}.rank_address between 4 and 25"\
+ f" AND {table}.type != 'postcode'"\
+ f" AND {table}.name is not null"\
+ f" AND {table}.linked_place_id is null"\
+ f" AND {table}.osm_type = 'N'" + \
+ " AND ST_Buffer(%s, reverse_place_diameter(%s)) && %s)" % \
+ tuple(map(lambda c: compiler.process(c, **kw), element.clauses))
+
+
+@compiles(IntersectsReverseDistance, 'sqlite') # type: ignore[no-untyped-call, misc]
+def sqlite_reverse_place_diameter(element: SaColumn,
+ compiler: 'sa.Compiled', **kw: Any) -> str:
+ geom1, rank, geom2 = list(element.clauses)
+ table = element.tablename
+
+ return (f"({table}.rank_address between 4 and 25"\
+ f" AND {table}.type != 'postcode'"\
+ f" AND {table}.name is not null"\
+ f" AND {table}.linked_place_id is null"\
+ f" AND {table}.osm_type = 'N'"\
+ " AND MbrIntersects(%s, ST_Expand(%s, 14.0 * exp(-0.2 * %s) - 0.03))"\
+ f" AND {table}.place_id IN"\
+ " (SELECT place_id FROM placex_place_node_areas"\
+ " WHERE ROWID IN (SELECT ROWID FROM SpatialIndex"\
+ " WHERE f_table_name = 'placex_place_node_areas'"\
+ " AND search_frame = %s)))") % (
+ compiler.process(geom1, **kw),
+ compiler.process(geom2, **kw),
+ compiler.process(rank, **kw),
+ compiler.process(geom2, **kw))
+
+
+class IsBelowReverseDistance(sa.sql.functions.GenericFunction[Any]):
+ name = 'IsBelowReverseDistance'
+ inherit_cache = True
+
+
+@compiles(IsBelowReverseDistance) # type: ignore[no-untyped-call, misc]
+def default_is_below_reverse_distance(element: SaColumn,
+ compiler: 'sa.Compiled', **kw: Any) -> str:
+ dist, rank = list(element.clauses)
+ return "%s < reverse_place_diameter(%s)" % (compiler.process(dist, **kw),
+ compiler.process(rank, **kw))
+
+
+@compiles(IsBelowReverseDistance, 'sqlite') # type: ignore[no-untyped-call, misc]
+def sqlite_is_below_reverse_distance(element: SaColumn,
+ compiler: 'sa.Compiled', **kw: Any) -> str:
+ dist, rank = list(element.clauses)
+ return "%s < 14.0 * exp(-0.2 * %s) - 0.03" % (compiler.process(dist, **kw),
+ compiler.process(rank, **kw))
+
def select_index_placex_geometry_reverse_lookupplacenode(table: str) -> 'sa.TextClause':
""" Create an expression with the necessary conditions over a placex
f" AND {table}.name is not null"
f" AND {table}.linked_place_id is null"
f" AND {table}.osm_type = 'N'")
+
+
+class IsAddressPoint(sa.sql.functions.GenericFunction[Any]):
+ name = 'IsAddressPoint'
+ inherit_cache = True
+
+ def __init__(self, table: sa.Table) -> None:
+ super().__init__(table.c.rank_address, # type: ignore[no-untyped-call]
+ table.c.housenumber, table.c.name)
+
+
+@compiles(IsAddressPoint) # type: ignore[no-untyped-call, misc]
+def default_is_address_point(element: SaColumn,
+ compiler: 'sa.Compiled', **kw: Any) -> str:
+ rank, hnr, name = list(element.clauses)
+ return "(%s = 30 AND (%s IS NOT NULL OR %s ? 'addr:housename'))" % (
+ compiler.process(rank, **kw),
+ compiler.process(hnr, **kw),
+ compiler.process(name, **kw))
+
+
+@compiles(IsAddressPoint, 'sqlite') # type: ignore[no-untyped-call, misc]
+def sqlite_is_address_point(element: SaColumn,
+ compiler: 'sa.Compiled', **kw: Any) -> str:
+ rank, hnr, name = list(element.clauses)
+ return "(%s = 30 AND coalesce(%s, json_extract(%s, '$.addr:housename')) IS NOT NULL)" % (
+ compiler.process(rank, **kw),
+ compiler.process(hnr, **kw),
+ compiler.process(name, **kw))
+
+
+class CrosscheckNames(sa.sql.functions.GenericFunction[Any]):
+ """ Check if in the given list of names in parameters 1 any of the names
+ from the JSON array in parameter 2 are contained.
+ """
+ name = 'CrosscheckNames'
+ inherit_cache = True
+
+@compiles(CrosscheckNames) # type: ignore[no-untyped-call, misc]
+def compile_crosscheck_names(element: SaColumn,
+ compiler: 'sa.Compiled', **kw: Any) -> str:
+ arg1, arg2 = list(element.clauses)
+ return "coalesce(avals(%s) && ARRAY(SELECT * FROM json_array_elements_text(%s)), false)" % (
+ compiler.process(arg1, **kw), compiler.process(arg2, **kw))
+
+
+@compiles(CrosscheckNames, 'sqlite') # type: ignore[no-untyped-call, misc]
+def compile_sqlite_crosscheck_names(element: SaColumn,
+ compiler: 'sa.Compiled', **kw: Any) -> str:
+ arg1, arg2 = list(element.clauses)
+ return "EXISTS(SELECT *"\
+ " FROM json_each(%s) as name, json_each(%s) as match_name"\
+ " WHERE name.value = match_name.value)"\
+ % (compiler.process(arg1, **kw), compiler.process(arg2, **kw))
+
+
+class JsonArrayEach(sa.sql.functions.GenericFunction[Any]):
+ """ Return elements of a json array as a set.
+ """
+ name = 'JsonArrayEach'
+ inherit_cache = True
+
+
+@compiles(JsonArrayEach) # type: ignore[no-untyped-call, misc]
+def default_json_array_each(element: SaColumn, compiler: 'sa.Compiled', **kw: Any) -> str:
+ return "json_array_elements(%s)" % compiler.process(element.clauses, **kw)
+
+
+@compiles(JsonArrayEach, 'sqlite') # type: ignore[no-untyped-call, misc]
+def sqlite_json_array_each(element: SaColumn, compiler: 'sa.Compiled', **kw: Any) -> str:
+ return "json_each(%s)" % compiler.process(element.clauses, **kw)
+
+
+class Greatest(sa.sql.functions.GenericFunction[Any]):
+ """ Function to compute maximum of all its input parameters.
+ """
+ name = 'greatest'
+ inherit_cache = True
+
+
+@compiles(Greatest, 'sqlite') # type: ignore[no-untyped-call, misc]
+def sqlite_greatest(element: SaColumn, compiler: 'sa.Compiled', **kw: Any) -> str:
+ return "max(%s)" % compiler.process(element.clauses, **kw)
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