[ https://issues.apache.org/jira/browse/SPARK-29768?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Xiao Li updated SPARK-29768: ---------------------------- Fix Version/s: 3.0.0 > nondeterministic expression fails column pruning > ------------------------------------------------ > > Key: SPARK-29768 > URL: https://issues.apache.org/jira/browse/SPARK-29768 > Project: Spark > Issue Type: Bug > Components: SQL > Affects Versions: 2.4.4 > Reporter: yucai > Assignee: Wenchen Fan > Priority: Major > Fix For: 3.0.0 > > > nondeterministic expression like monotonically_increasing_id fails column > pruning > {code} > spark.range(10).selectExpr("id as key", "id * 2 as value"). > write.format("parquet").save("/tmp/source") > spark.range(10).selectExpr("id as key", "id * 3 as s1", "id * 5 as s2"). > write.format("parquet").save("/tmp/target") > val sourceDF = spark.read.parquet("/tmp/source") > val targetDF = spark.read.parquet("/tmp/target"). > withColumn("row_id", monotonically_increasing_id()) > sourceDF.join(targetDF, "key").select("key", "row_id").explain() > {code} > Spark reads all columns from targetDF, but actually, we only need `key` > column. > {code} > scala> sourceDF.join(targetDF, "key").select("key", "row_id").explain() > == Physical Plan == > *(2) Project [key#78L, row_id#88L] > +- *(2) BroadcastHashJoin [key#78L], [key#82L], Inner, BuildLeft > :- BroadcastExchange HashedRelationBroadcastMode(List(input[0, bigint, > true])) > : +- *(1) Project [key#78L] > : +- *(1) Filter isnotnull(key#78L) > : +- *(1) FileScan parquet [key#78L] Batched: true, Format: > Parquet, Location: InMemoryFileIndex[file:/tmp/source], PartitionFilters: [], > PushedFilters: [IsNotNull(key)], ReadSchema: struct<key:bigint> > +- *(2) Filter isnotnull(key#82L) > +- *(2) Project [key#82L, monotonically_increasing_id() AS row_id#88L] > +- *(2) FileScan parquet [key#82L,s1#83L,s2#84L] Batched: true, > Format: Parquet, Location: InMemoryFileIndex[file:/tmp/target], > PartitionFilters: [], PushedFilters: [], ReadSchema: > struct<key:bigint,s1:bigint,s2:bigint> > {code} -- This message was sent by Atlassian Jira (v8.3.4#803005) --------------------------------------------------------------------- To unsubscribe, e-mail: issues-unsubscr...@spark.apache.org For additional commands, e-mail: issues-h...@spark.apache.org