Function convert_parquet_statistics

datafusion-cli/src/functions.rs:255–301

(
    value: &Statistics,
    converted_type: ConvertedType,
)

}

fn convert_parquet_statistics(
    value: &Statistics,
    converted_type: ConvertedType,
) -> (Option<String>, Option<String>) {
    match (value, converted_type) {
        (Statistics::Boolean(val), _) => (
            val.min_opt().map(|v| v.to_string()),
            val.max_opt().map(|v| v.to_string()),
        ),
        (Statistics::Int32(val), _) => (
            val.min_opt().map(|v| v.to_string()),
            val.max_opt().map(|v| v.to_string()),
        ),
        (Statistics::Int64(val), _) => (
            val.min_opt().map(|v| v.to_string()),
            val.max_opt().map(|v| v.to_string()),
        ),
        (Statistics::Int96(val), _) => (
            val.min_opt().map(|v| v.to_string()),
            val.max_opt().map(|v| v.to_string()),
        ),
        (Statistics::Float(val), _) => (
            val.min_opt().map(|v| v.to_string()),
            val.max_opt().map(|v| v.to_string()),
        ),
        (Statistics::Double(val), _) => (
            val.min_opt().map(|v| v.to_string()),
            val.max_opt().map(|v| v.to_string()),
        ),
        (Statistics::ByteArray(val), ConvertedType::UTF8) => (
            byte_array_to_string(val.min_opt()),
            byte_array_to_string(val.max_opt()),
        ),
        (Statistics::ByteArray(val), _) => (
            val.min_opt().map(|v| v.to_string()),
            val.max_opt().map(|v| v.to_string()),
        ),
        (Statistics::FixedLenByteArray(val), ConvertedType::UTF8) => (
            fixed_len_byte_array_to_string(val.min_opt()),
            fixed_len_byte_array_to_string(val.max_opt()),
        ),
        (Statistics::FixedLenByteArray(val), _) => (
            val.min_opt().map(|v| v.to_string()),
            val.max_opt().map(|v| v.to_string()),
        ),
    }
}

/// Convert to a string if it has utf8 encoding, otherwise print bytes directly
fn byte_array_to_string(val: Option<&ByteArray>) -> Option<String> {