Deprecated: The each() function is deprecated. This message will be suppressed on further calls in /home/zhenxiangba/zhenxiangba.com/public_html/phproxy-improved-master/index.php on line 456
datafusion::physical_optimizer::join_selection - Rust
[go: Go Back, main page]

Module datafusion::physical_optimizer::join_selection

source ·
Expand description

Select the proper PartitionMode and build side based on the avaliable statistics for hash join.

Structs

JoinSelection
For hash join with the partition mode PartitionMode::Auto, JoinSelection rule will make a cost based decision to select which PartitionMode mode(Partitioned/CollectLeft) is optimal based on the available statistics that the inputs have. If the statistics information is not available, the partition mode will fall back to PartitionMode::Partitioned.