Struct mz_persist_types::dyn_struct::DynStructCol

pub struct DynStructCol {
    pub(crate) len: usize,
    pub(crate) cfg: DynStructCfg,
    pub(crate) validity: Option<NullBuffer>,
    pub(crate) cols: Vec<DynColumnRef>,
}

A crate::columnar::ColumnGet impl for DynStruct.

Fields

len: usize

cfg: DynStructCfg

validity: Option<NullBuffer>

cols: Vec<DynColumnRef>

Implementations

impl DynStructCol

pub(crate) fn empty(cfg: DynStructCfg) -> Self

fn cols(&self) -> impl Iterator<Item = (&str, &StatsFn, &DynColumnRef)>

pub fn as_ref(&self) -> ColumnsRef

Explodes this non-optional struct column into its component fields.

Panics if this struct is optional.

pub fn as_opt_ref(&self) -> ColumnsRef<ValidityRef>

Explodes this optional struct column into its component fields and validity.

If the column is actually non-option, succeeds and acts as if every value is a Some.

pub(crate) fn stats( &self, validity: ValidityRef, ) -> Result<OptionStats<StructStats>, String>

pub(crate) fn to_arrow_struct(&self) -> Option<StructArray>

pub fn from_arrow(cfg: DynStructCfg, array: &dyn Array) -> Result<Self, String>

Create a DynStructCol from an arrow::array::Array.

pub(crate) fn validate(&self) -> Result<(), String>

Trait Implementations

impl ColumnGet<DynStruct> for DynStructCol

fn get<'a>(&'a self, idx: usize) -> DynStructRef<'a>

Retrieves the value at index.

impl ColumnGet<Option<DynStruct>> for DynStructCol

fn get<'a>(&'a self, idx: usize) -> Option<DynStructRef<'a>>

Retrieves the value at index.

impl ColumnRef<DynStructCfg> for DynStructCol

fn cfg(&self) -> &DynStructCfg

Returns the super::ColumnCfg for this column.

fn len(&self) -> usize

Returns the number of elements in this column.

fn to_arrow(&self) -> Arc<dyn Array>

Returns this column as an arrow Array.

fn from_arrow(cfg: &DynStructCfg, array: &dyn Array) -> Result<Self, String>

Constructs the column from an arrow Array.

impl Debug for DynStructCol

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

Formats the value using the given formatter.

impl From<DynStructMut> for DynStructCol

fn from(value: DynStructMut) -> Self

Converts to this type from the input type.

impl StatsFrom<DynStructCol> for OptionStats<StructStats>

fn stats_from(col: &DynStructCol, validity: ValidityRef) -> Self

Computes statistics from a column of data.

impl StatsFrom<DynStructCol> for StructStats

fn stats_from(col: &DynStructCol, validity: ValidityRef) -> Self

Computes statistics from a column of data.