sqlalchemy.sql operators Example Code

operators is a callable within the sqlalchemy.sql module of the SQLAlchemy project.

Example 1 from GeoAlchemy2

GeoAlchemy2 (project documentation and PyPI package information) extends SQLAlchemy with new data types for working with geospatial databases, particularly PostGIS, which is a spatial database extender for PostgreSQL. The project is provided as open source under the MIT license.

GeoAlchemy2 / geoalchemy2 / comparator.py

# comparator.py

from sqlalchemy import types as sqltypes
from sqlalchemy.types import UserDefinedType
from sqlalchemy.dialects.postgresql import DOUBLE_PRECISION
from sqlalchemy.sql import operators
try:
    from sqlalchemy.sql.functions import _FunctionGenerator
except ImportError:  # SQLA < 0.9  # pragma: no cover
    from sqlalchemy.sql.expression import _FunctionGenerator


INTERSECTS = operators.custom_op('&&')
OVERLAPS_OR_TO_LEFT = operators.custom_op('&<')
OVERLAPS_OR_TO_RIGHT = operators.custom_op('&>')
OVERLAPS_OR_BELOW = operators.custom_op('&<|')
TO_LEFT = operators.custom_op('<<')
BELOW = operators.custom_op('<<|')
TO_RIGHT = operators.custom_op('>>')
CONTAINED = operators.custom_op('@')
OVERLAPS_OR_ABOVE = operators.custom_op('|&>')
ABOVE = operators.custom_op('|>>')
CONTAINS = operators.custom_op('-')
SAME = operators.custom_op('-=')
DISTANCE_CENTROID = operators.custom_op('<->')
DISTANCE_BOX = operators.custom_op('<#>')


class BaseComparator(UserDefinedType.Comparator):

    key = None

    def __getattr__(self, name):


        if not name.lower().startswith('st_'):
            raise AttributeError


        func_ = _FunctionGenerator(expr=self.expr)
        return getattr(func_, name)

    def intersects(self, other):
        return self.operate(INTERSECTS, other, result_type=sqltypes.Boolean)

    def overlaps_or_to_left(self, other):
        return self.operate(OVERLAPS_OR_TO_LEFT, other,
                            result_type=sqltypes.Boolean)

    def overlaps_or_to_right(self, other):


## ... source file continues with no further operators examples...

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