do not use index when searching in large areas

[nominatim.git] / nominatim / db / sqlalchemy_types.py

diff --git a/nominatim/db/sqlalchemy_types.py b/nominatim/db/sqlalchemy_types.py
index 88cae29f3a4e8982c60b32c33efc668ab88d7053..9e1f9fcecf8c1dc819e616bbbe708f40ccfd7949 100644 (file)
--- a/nominatim/db/sqlalchemy_types.py
+++ b/nominatim/db/sqlalchemy_types.py
@@ -7,14 +7,17 @@
 """
 Custom types for SQLAlchemy.
 """
-from typing import Callable, Any
+from typing import Callable, Any, cast
+import sys
 
 import sqlalchemy as sa
-import sqlalchemy.types as types
+from sqlalchemy import types
 
-from nominatim.typing import SaColumn
+from nominatim.typing import SaColumn, SaBind
 
-class Geometry(types.UserDefinedType[Any]):
+#pylint: disable=all
+
+class Geometry(types.UserDefinedType): # type: ignore[type-arg]
     """ Simplified type decorator for PostGIS geometry. This type
         only supports geometries in 4326 projection.
     """
@@ -28,25 +31,30 @@ class Geometry(types.UserDefinedType[Any]):
         return f'GEOMETRY({self.subtype}, 4326)'
 
 
-    def bind_processor(self, dialect: sa.Dialect) -> Callable[[Any], str]:
+    def bind_processor(self, dialect: 'sa.Dialect') -> Callable[[Any], str]:
         def process(value: Any) -> str:
-            assert isinstance(value, str)
-            return value
+            if isinstance(value, str):
+                return value
+
+            return cast(str, value.to_wkt())
         return process
 
 
-    def result_processor(self, dialect: sa.Dialect, coltype: object) -> Callable[[Any], str]:
+    def result_processor(self, dialect: 'sa.Dialect', coltype: object) -> Callable[[Any], str]:
         def process(value: Any) -> str:
             assert isinstance(value, str)
             return value
         return process
 
 
-    def bind_expression(self, bindvalue: sa.BindParameter[Any]) -> SaColumn:
-        return sa.func.ST_GeomFromText(bindvalue, type_=self)
+    def bind_expression(self, bindvalue: SaBind) -> SaColumn:
+        return sa.func.ST_GeomFromText(bindvalue, sa.text('4326'), type_=self)
 
 
-    class comparator_factory(types.UserDefinedType.Comparator):
+    class comparator_factory(types.UserDefinedType.Comparator): # type: ignore[type-arg]
+
+        def intersects(self, other: SaColumn) -> 'sa.Operators':
+            return self.op('&&')(other)
 
         def is_line_like(self) -> SaColumn:
             return sa.func.ST_GeometryType(self, type_=sa.String).in_(('ST_LineString',
@@ -58,7 +66,15 @@ class Geometry(types.UserDefinedType[Any]):
 
 
         def ST_DWithin(self, other: SaColumn, distance: SaColumn) -> SaColumn:
-            return sa.func.ST_DWithin(self, other, distance, type_=sa.Float)
+            return sa.func.ST_DWithin(self, other, distance, type_=sa.Boolean)
+
+
+        def ST_DWithin_no_index(self, other: SaColumn, distance: SaColumn) -> SaColumn:
+            return sa.func._ST_DWithin(self, other, distance, type_=sa.Boolean)
+
+
+        def ST_Intersects_no_index(self, other: SaColumn) -> SaColumn:
+            return sa.func._ST_Intersects(self, other, type_=sa.Boolean)
 
 
         def ST_Distance(self, other: SaColumn) -> SaColumn:
@@ -66,7 +82,11 @@ class Geometry(types.UserDefinedType[Any]):
 
 
         def ST_Contains(self, other: SaColumn) -> SaColumn:
-            return sa.func.ST_Contains(self, other, type_=sa.Float)
+            return sa.func.ST_Contains(self, other, type_=sa.Boolean)
+
+
+        def ST_CoveredBy(self, other: SaColumn) -> SaColumn:
+            return sa.func.ST_CoveredBy(self, other, type_=sa.Boolean)
 
 
         def ST_ClosestPoint(self, other: SaColumn) -> SaColumn:
@@ -81,6 +101,10 @@ class Geometry(types.UserDefinedType[Any]):
             return sa.func.ST_Expand(self, other, type_=Geometry)
 
 
+        def ST_Collect(self) -> SaColumn:
+            return sa.func.ST_Collect(self, type_=Geometry)
+
+
         def ST_Centroid(self) -> SaColumn:
             return sa.func.ST_Centroid(self, type_=Geometry)