Method with_null_regex

datafusion/datasource-csv/src/file_format.rs:235–238

Set the regex to use for null values in the CSV reader. - default to treat empty values as null.

(mut self, null_regex: Option<String>)

    /// Set the regex to use for null values in the CSV reader.
    /// - default to treat empty values as null.
    pub fn with_null_regex(mut self, null_regex: Option<String>) -> Self {
        self.options.null_regex = null_regex;
        self
    }

    /// Returns `Some(true)` if the first line is a header, `Some(false)` if
    /// it is not, and `None` if it is not specified.