Method is_false

datafusion/expr-common/src/interval_arithmetic.rs:1899–1907

Returns the set of possible values after applying the `is false` test on all values in this set. The resulting set can only contain 'TRUE' and/or 'FALSE', never 'UNKNOWN'.

(&self)

    /// values in this set.
    /// The resulting set can only contain 'TRUE' and/or 'FALSE', never 'UNKNOWN'.
    pub fn is_false(&self) -> Result<Self> {
        let (t, f, u) = self.is_true_false_unknown()?;

        match (t, f, u) {
            (false, true, false) => Ok(Self::TRUE),
            (_, true, _) => Ok(Self::TRUE_OR_FALSE),
            (_, false, _) => Ok(Self::FALSE),
        }
    }

    /// Return true if the value is definitely null (and not true or false).
    pub fn is_certainly_unknown(&self) -> bool {