Struct JoinStreamChunkBuilder Copy item path

impl JoinStreamChunkBuilder

pub fn new( chunk_size: usize, data_types: Vec<DataType>, update_to_output: Vec<(usize, usize)>, matched_to_output: Vec<(usize, usize)>, ) -> Self

pub fn get_i2o_mapping( output_indices: &[usize], left_len: usize, right_len: usize, ) -> (Vec<(usize, usize)>, Vec<(usize, usize)>)

Get the mappings from left/right input indices to the output indices. The mappings can be used to create JoinStreamChunkBuilder later.

Please note the semantics of update and matched when creating the builder: either left or right side can be update side or matched side, the key is to call the corresponding append method once you passed left_to_output/right_to_output to update_to_output/matched_to_output.

pub fn append_row( &mut self, op: Op, row_update: impl Row, row_matched: impl Row, ) -> Option<StreamChunk>

Append a row with coming update value and matched value.

A StreamChunk will be returned when size == capacity.

pub fn append_row_update( &mut self, op: Op, row_update: impl Row, ) -> Option<StreamChunk>

Append a row with coming update value and fill the other side with null.

A StreamChunk will be returned when size == capacity.

pub fn append_row_matched( &mut self, op: Op, row_matched: impl Row, ) -> Option<StreamChunk>

Append a row with matched value and fill the coming side with null.

A StreamChunk will be returned when size == capacity.

pub fn take(&mut self) -> Option<StreamChunk>

Take out the remaining rows as a chunk. Return None if the builder is empty.

Auto Trait Implementations§

impl UnwindSafe for JoinStreamChunkBuilder

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