Liang-Chi Hsieh created SPARK-29013: ---------------------------------------
Summary: Structurally equivalent subexpression elimination Key: SPARK-29013 URL: https://issues.apache.org/jira/browse/SPARK-29013 Project: Spark Issue Type: New Feature Components: SQL Affects Versions: 3.0.0 Reporter: Liang-Chi Hsieh We do semantically equivalent subexpression elimination in SparkSQL. However, for some expressions that are not semantically equivalent, but structurally equivalent, current subexpression elimination generates too many similar functions. These functions share same computation structure but only differ in input slots of current processing row. For such expressions, we can generate just one function, and pass in input slots during runtime. It can reduce the length of generated code text, and save compilation time. -- This message was sent by Atlassian Jira (v8.3.2#803003) --------------------------------------------------------------------- To unsubscribe, e-mail: issues-unsubscr...@spark.apache.org For additional commands, e-mail: issues-h...@spark.apache.org