2023-03-20 duckdb-Push-Based Execution Model 

如下SQL的物理计划执行

select 100+(select 3), id from user where id = (select id from score where id = 1)

 

 

 Pipeline与MetaPipeline

Pipeline是一串Op. MetaPipeline是pipeline组成的树

Executor构建MetaPipeline 

MetaPipeline Ready: 逆转pipeline中的operator 

PipeLine是Event驱动的

 

 PipeLineTask调度