Method get_exact_column_statistics

datafusion/common/src/pruning.rs:331–361

(
        &self,
        column: &Column,
        get_stat: impl Fn(&ColumnStatistics) -> &Precision<ScalarValue>,
    )

    }

    fn get_exact_column_statistics(
        &self,
        column: &Column,
        get_stat: impl Fn(&ColumnStatistics) -> &Precision<ScalarValue>,
    ) -> Option<ArrayRef> {
        let index = self.schema.index_of(column.name()).ok()?;
        let mut has_value = false;
        match ScalarValue::iter_to_array(self.statistics.iter().map(|s| {
            s.column_statistics
                .get(index)
                .and_then(|stat| {
                    if let Precision::Exact(min) = get_stat(stat) {
                        has_value = true;
                        Some(min.clone())
                    } else {
                        None
                    }
                })
                .unwrap_or(ScalarValue::Null)
        })) {
            // If there is any non-null value and no errors, return the array
            Ok(array) => has_value.then_some(array),
            Err(_) => {
                log::warn!(
                    "Failed to convert min values to array for column {}",
                    column.name()
                );
                None
            }
        }
    }
}

impl PruningStatistics for PrunableStatistics {