Rakesh Raushan created SPARK-44817: -------------------------------------- Summary: Incremental Stats Collection Key: SPARK-44817 URL: https://issues.apache.org/jira/browse/SPARK-44817 Project: Spark Issue Type: Improvement Components: SQL Affects Versions: 4.0.0 Reporter: Rakesh Raushan
Spark's Cost Based Optimizer is dependent on the table and column statistics. After every execution of DML query, table and column stats are invalidated if auto update of stats collection is not turned on. To keep stats updated we need to run `ANALYZE TABLE COMPUTE STATISTICS` command which is very expensive. It is not feasible to run this command after every DML query. Instead, we can incrementally update the stats during each DML query run itself. This way our table and column stats would be fresh at all the time and CBO benefits can be applied. *Pros:* 1. Optimize queries over table which is updated frequently. 2. Saves Compute cycles by removing dependency over `ANALYZE TABLE COMPUTE STATISTICS` for updating stats. -- This message was sent by Atlassian Jira (v8.20.10#820010) --------------------------------------------------------------------- To unsubscribe, e-mail: issues-unsubscr...@spark.apache.org For additional commands, e-mail: issues-h...@spark.apache.org