Method statistics

datafusion/datasource/src/file_scan_config/mod.rs:1107–1113

Returns the unprojected table statistics, marking them as inexact if filters are present. When filters are pushed down (including pruning predicates and bloom filters), we can't guarantee the statistics are exact because we don't know how many rows will be filtered out.

(&self)

    /// we can't guarantee the statistics are exact because we don't know how many
    /// rows will be filtered out.
    pub fn statistics(&self) -> Statistics {
        if self.file_source.filter().is_some() {
            self.statistics.clone().to_inexact()
        } else {
            self.statistics.clone()
        }
    }

    pub fn projected_schema(&self) -> Result<Arc<Schema>> {
        let schema = self.file_source.table_schema().table_schema();