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.. _postgresql_toplevel:
PostgreSQL
==========
.. automodule:: sqlalchemy.dialects.postgresql.base
PostgreSQL Data Types
------------------------
As with all SQLAlchemy dialects, all UPPERCASE types that are known to be
valid with Postgresql are importable from the top level dialect, whether
they originate from :mod:`sqlalchemy.types` or from the local dialect::
from sqlalchemy.dialects.postgresql import \
ARRAY, BIGINT, BIT, BOOLEAN, BYTEA, CHAR, CIDR, DATE, \
DOUBLE_PRECISION, ENUM, FLOAT, HSTORE, INET, INTEGER, \
INTERVAL, MACADDR, NUMERIC, REAL, SMALLINT, TEXT, TIME, \
TIMESTAMP, UUID, VARCHAR, INT4RANGE, INT8RANGE, NUMRANGE, \
DATERANGE, TSRANGE, TSTZRANGE
Types which are specific to PostgreSQL, or have PostgreSQL-specific
construction arguments, are as follows:
.. currentmodule:: sqlalchemy.dialects.postgresql
.. autoclass:: array
.. autoclass:: ARRAY
:members: __init__, Comparator
:show-inheritance:
.. autoclass:: Any
.. autoclass:: All
.. autoclass:: BIT
:members: __init__
:show-inheritance:
.. autoclass:: BYTEA
:members: __init__
:show-inheritance:
.. autoclass:: CIDR
:members: __init__
:show-inheritance:
.. autoclass:: DOUBLE_PRECISION
:members: __init__
:show-inheritance:
.. autoclass:: ENUM
:members: __init__, create, drop
:show-inheritance:
.. autoclass:: HSTORE
:members:
:show-inheritance:
.. autoclass:: hstore
:members:
:show-inheritance:
.. autoclass:: INET
:members: __init__
:show-inheritance:
.. autoclass:: INTERVAL
:members: __init__
:show-inheritance:
.. autoclass:: MACADDR
:members: __init__
:show-inheritance:
.. autoclass:: REAL
:members: __init__
:show-inheritance:
.. autoclass:: UUID
:members: __init__
:show-inheritance:
.. autoclass:: sqlalchemy.dialects.postgresql.ranges.RangeOperators
:members:
.. autoclass:: INT4RANGE
:show-inheritance:
.. autoclass:: INT8RANGE
:show-inheritance:
.. autoclass:: NUMRANGE
:show-inheritance:
.. autoclass:: DATERANGE
:show-inheritance:
.. autoclass:: TSRANGE
:show-inheritance:
.. autoclass:: TSTZRANGE
:show-inheritance:
PostgreSQL Constraint Types
---------------------------
SQLAlchemy supports Postgresql EXCLUDE constraints via the
:class:`ExcludeConstraint` class:
.. autoclass:: ExcludeConstraint
:show-inheritance:
:members: __init__
For example::
from sqlalchemy.dialects.postgresql import (
ExcludeConstraint,
TSRANGE as Range,
)
class RoomBookings(Base):
room = Column(Integer(), primary_key=True)
during = Column(TSRANGE())
__table_args__ = (
ExcludeConstraint(('room', '='), ('during', '&&')),
)
psycopg2
--------------
.. automodule:: sqlalchemy.dialects.postgresql.psycopg2
py-postgresql
--------------------
.. automodule:: sqlalchemy.dialects.postgresql.pypostgresql
pg8000
--------------
.. automodule:: sqlalchemy.dialects.postgresql.pg8000
zxjdbc
--------------
.. automodule:: sqlalchemy.dialects.postgresql.zxjdbc
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