Function false

lib/sqlalchemy/sql/_elements_constructors.py:1288–1325

Return a :class:`.False_` construct. E.g.: .. sourcecode:: pycon+sql >>> from sqlalchemy import false >>> print(select(t.c.x).where(false())) {printsql}SELECT x FROM t WHERE false A backend which does not support true/false constants will render as an expr

()

def false() -> False_:
    """Return a :class:`.False_` construct.

    E.g.:

    .. sourcecode:: pycon+sql

        >>> from sqlalchemy import false
        >>> print(select(t.c.x).where(false()))
        {printsql}SELECT x FROM t WHERE false

    A backend which does not support true/false constants will render as
    an expression against 1 or 0:

    .. sourcecode:: pycon+sql

        >>> print(select(t.c.x).where(false()))
        {printsql}SELECT x FROM t WHERE 0 = 1

    The :func:`.true` and :func:`.false` constants also feature
    "short circuit" operation within an :func:`.and_` or :func:`.or_`
    conjunction:

    .. sourcecode:: pycon+sql

        >>> print(select(t.c.x).where(or_(t.c.x > 5, true())))
        {printsql}SELECT x FROM t WHERE true{stop}

        >>> print(select(t.c.x).where(and_(t.c.x > 5, false())))
        {printsql}SELECT x FROM t WHERE false{stop}

    .. seealso::

        :func:`.true`

    """

    return False_._instance()


def funcfilter(