



Prune unnecessary nested fields from repartition-by-expression and join ( SPARK-31736).Prune unnecessary nested fields from aggregate and expand ( SPARK-27217).Prune unnecessary nested fields from generate without project ( SPARK-29721).Rule CoalesceBucketsInJoin ( SPARK-31350).Rule DisableUnnecessaryBucketedScan ( SPARK-32859).Rule UnwrapCastInBinar圜omparison ( SPARK-32858).Rule EliminateAggregateFilter ( SPARK-32540).Rule EliminateNullAwareAntiJoin ( SPARK-32573).Rule ExtractSingleColumnNullAwareAntiJoin ( SPARK-32290).Support subexpression elimination for interpreted predicate ( SPARK-33540).Support subexpression elimination for interpreted expression evaluation ( SPARK-33427).Support subexpression elimination in conditional expressions ( SPARK-33337).Support subexpression elimination in project with whole-stage-codegen ( SPARK-33092).
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Add SQL standard command SET TIME ZONE ( SPARK-32272).ANSI mode: new explicit cast syntax rules ( SPARK-33354).ANSI mode: runtime errors instead of returning null ( SPARK-33275).Support char/varchar data type ( SPARK-33480).Experimental node decommissioning for Kubernates and Standalone ( SPARK-20624).Shuffled hash join improvement ( SPARK-32461).Unify create table SQL syntax ( SPARK-31257).We have curated a list of high level changes here, grouped by major modules. You can consult JIRA for the detailed changes.
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To download Apache Spark 3.1.1, visit the downloads page. In addition, this release continues to focus on usability, stability, and polish while resolving around 1500 tickets. Other major updates include improved ANSI SQL compliance support, history server support in structured streaming, the general availability (GA) of Kubernetes and node decommissioning in Kubernetes and Standalone. This release adds Python type annotations and Python dependency management support as part of Project Zen. Apache Spark 3.1.1 is the second release of the 3.x line.
