risingwave_batch::executor::join

Function concatenate

source 
fn concatenate(left: &DataChunk, right: &DataChunk) -> Result<DataChunk>
Expand description

The layout be like:

[ left chunk | right chunk ]

ยงArguments

  • left Data chunk padded to the left half of result data chunk..
  • right Data chunk padded to the right half of result data chunk.

Note: Use this function with careful: It is not designed to be a general concatenate of two chunk: Usually one side should be const row chunk and the other side is normal chunk. Currently only feasible to use in join executor. If two normal chunk, the result is undefined.