Enum SourceChunkPlanningMode 

pub enum SourceChunkPlanningMode {
    Conservative,
    LocalParquetThroughput,
}

How source chunk planning sizes local Parquet chunks. The chosen mode and the reason for it are recorded in each chunk plan.

In both modes the source-byte target bounds each chunk’s decoded size, and a chunk whose allocation the query cap rejects is split by row group and retried within the policy’s retry limits.

Variants

Conservative

Chunks follow max_row_groups_per_chunk, one row group by default. Each chunk is then the smallest retry unit, but per-chunk work such as partial aggregation grows with the table’s row-group count.

LocalParquetThroughput

Raises a one-row-group cap so a chunk of a local Parquet source can hold many row groups up to the source-byte target; crate::chunk owns the row-group cap and the source conditions. A source that does not qualify keeps conservative chunks.

Implementations

impl SourceChunkPlanningMode

pub const fn as_str(self) -> &'static str

Stable source-planning mode label used in reports and configuration.

Trait Implementations

impl Clone for SourceChunkPlanningMode

fn clone(&self) -> SourceChunkPlanningMode

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for SourceChunkPlanningMode

impl Debug for SourceChunkPlanningMode

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

Formats the value using the given formatter.

impl Default for SourceChunkPlanningMode

fn default() -> SourceChunkPlanningMode

Returns the “default value” for a type.

impl Display for SourceChunkPlanningMode

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

Formats the value using the given formatter.

impl Eq for SourceChunkPlanningMode

impl Hash for SourceChunkPlanningMode

fn hash<__H>(&self, state: &mut __H)

where __H: Hasher,

Feeds this value into the given Hasher.

fn hash_slice<H>(data: &[Self], state: &mut H)

where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher.

impl PartialEq for SourceChunkPlanningMode

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

Equality operator ==.

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

Inequality operator !=.

impl StructuralPartialEq for SourceChunkPlanningMode