HyukjinKwon commented on a change in pull request #27728:
[SPARK-25556][SPARK-17636][SPARK-31026][SPARK-31060][SQL][test-hive1.2] Nested
Column Predicate Pushdown for Parquet
URL: https://github.com/apache/spark/pull/27728#discussion_r397711991
##########
File path:
sql/catalyst/src/main/scala/org/apache/spark/sql/internal/SQLConf.scala
##########
@@ -2049,6 +2049,17 @@ object SQLConf {
.booleanConf
.createWithDefault(true)
+ val NESTED_PREDICATE_PUSHDOWN_ENABLED =
+ buildConf("spark.sql.optimizer.nestedPredicatePushdown.enabled")
+ .internal()
+ .doc("When true, Spark tries to push down predicates for nested columns
and or names " +
+ "containing `dots` to data sources. Currently, Parquet implements both
optimizations " +
+ "while ORC only supports predicates for names containing `dots`. The
other data sources" +
+ "don't support this feature yet.")
+ .version("3.0.0")
+ .booleanConf
+ .createWithDefault(true)
Review comment:
Will we port this back to branch-3.0?
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