Struct mz_persist::indexed::columnar::ColumnarRecordsStructuredExt

pub struct ColumnarRecordsStructuredExt {
    pub key: ArrayRef,
    pub val: ArrayRef,
}

An “extension” to ColumnarRecords that duplicates the “key” (K) and “val” (V) columns as structured Arrow data.

ColumnarRecords stores the key and value columns as binary blobs encoded with the Codec trait. We’re migrating to instead store the key and value columns as structured Parquet data, which we interface with via Arrow.

Fields

key: ArrayRef

The structured k column.

arrow does not allow empty StructArrays so we model an empty key column as None.

val: ArrayRef

The structured v column.

arrow does not allow empty StructArrays so we model an empty val column as None.

Implementations

impl ColumnarRecordsStructuredExt

pub fn into_proto(&self) -> (ProtoArrayData, ProtoArrayData)

See RustType::into_proto.

fn from_proto( key: Option<ProtoArrayData>, val: Option<ProtoArrayData>, ) -> Result<Option<Self>, TryFromProtoError>

See RustType::from_proto.

pub fn goodbytes(&self) -> usize

The “goodput” of these arrays, excluding overhead like offsets etc.

Trait Implementations

impl Clone for ColumnarRecordsStructuredExt

fn clone(&self) -> ColumnarRecordsStructuredExt

Returns a copy of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for ColumnarRecordsStructuredExt

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl PartialEq for ColumnarRecordsStructuredExt

fn eq(&self, other: &Self) -> bool

Tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.