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RunReader

linkrs_query::executor::streaming::spill

Struct RunReader 

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pub struct RunReader { /* private fields */ }
Expand description

Reads a columnar run file back, validating the header (magic, version, checksum) on open and each section frame (checksum) on decode.

Sections stream one at a time (bounded by [SECTION_ROWS]), so reader memory stays flat regardless of run size.

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impl RunReader

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pub fn open(run: &SpilledRun) -> Result<Self, QueryError>

Open and validate a run file.

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pub fn open_path(path: &Path) -> Result<Self, QueryError>

Open a run file with default validation (allows any schema fingerprint).

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pub fn read_row(&mut self) -> Result<Option<Vec<Value>>, QueryError>

Read the next row from the run.

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pub fn read_all(&mut self) -> Result<Vec<Vec<Value>>, QueryError>

Read all remaining rows from the run.

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pub fn read_batch( &mut self, n: usize, ) -> Result<Option<MaterializedBatch>, QueryError>

Read up to n rows into a columnar batch.

Returns None when the run is exhausted. Bounds peak memory to one output slice instead of the full run.

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pub fn header(&self) -> &RunHeader

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pub fn remaining(&self) -> u64

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pub fn path(&self) -> &Path

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impl Debug for RunReader

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

Formats the value using the given formatter. Read more

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