Currently, there are some useless includes in the codebase. We can use a tool named include-what-you-use to optimize these includes. By using a strict include-what-you-use policy, we can get lots of benefits from it.
Co-authored-by: Lijia Liu <liutang123@yeah.net> Co-authored-by: HappenLee <happenlee@hotmail.com> Co-authored-by: Jerry Hu <mrhhsg@gmail.com> Co-authored-by: Pxl <952130278@qq.com> Co-authored-by: shee <13843187+qzsee@users.noreply.github.com> Co-authored-by: Gabriel <gabrielleebuaa@gmail.com> ## Problem Summary: ### 1. Design DSIP: https://cwiki.apache.org/confluence/display/DORIS/DSIP-027%3A+Support+Pipeline+Exec+Engine ### 2. How to use: Set the environment variable `set enable_pipeline_engine = true; `
