[
https://issues.apache.org/jira/browse/SPARK-25579?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Dongjoon Hyun reassigned SPARK-25579:
-------------------------------------
Assignee: Dongjoon Hyun
> Use quoted attribute names if needed in pushed ORC predicates
> -------------------------------------------------------------
>
> Key: SPARK-25579
> URL: https://issues.apache.org/jira/browse/SPARK-25579
> Project: Spark
> Issue Type: Bug
> Components: SQL
> Affects Versions: 2.4.0
> Reporter: Dongjoon Hyun
> Assignee: Dongjoon Hyun
> Priority: Major
>
> This issue aims to fix an ORC performance regression at Spark 2.4.0 RCs from
> Spark 2.3.2. For column names with `.`, the pushed predicates are ignored.
> *Spark 2.3.2*
> {code:java}
> scala> val df = spark.range(Int.MaxValue).sample(0.2).toDF("col.with.dot")
> scala> df.write.mode("overwrite").orc("/tmp/orc")
> scala> df.write.mode("overwrite").parquet("/tmp/parquet")
> scala> spark.sql("set spark.sql.orc.impl=native")
> scala> spark.sql("set spark.sql.orc.filterPushdown=true")
> scala> spark.time(spark.read.orc("/tmp/orc").where("`col.with.dot` =
> 50000").count)
> Time taken: 803 ms
> scala> spark.time(spark.read.parquet("/tmp/parquet").where("`col.with.dot` =
> 50000").count)
> Time taken: 5573 ms
> {code}
> *Spark 2.4.0 RC2*
> {code:java}
> scala> spark.time(spark.read.orc("/tmp/orc").where("`col.with.dot` =
> 50000").count)
> Time taken: 2405 ms{code}
--
This message was sent by Atlassian JIRA
(v7.6.3#76005)
---------------------------------------------------------------------
To unsubscribe, e-mail: issues-unsubscr...@spark.apache.org
For additional commands, e-mail: issues-h...@spark.apache.org
