xdcjie created SPARK-24339: ------------------------------ Summary: spark sql can not prune column in transform/map/reduce query Key: SPARK-24339 URL: https://issues.apache.org/jira/browse/SPARK-24339 Project: Spark Issue Type: Improvement Components: SQL Affects Versions: 2.2.1, 2.2.0, 2.1.2, 2.1.1 Reporter: xdcjie Fix For: 2.2.1, 2.2.0, 2.1.2, 2.1.1
I was using {{TRANSFORM USING}} with branch-2.1/2.2, and noticed that it will scan all column of data, query like: {code:java} SELECT TRANSFORM(usid, cch) USING 'python test.py' AS (u1, c1, u2, c2) FROM test_table;{code} it's physical plan like: {code:java} == Physical Plan == ScriptTransformation [usid#17, cch#9], python test.py, [u1#784, c1#785, u2#786, c2#787], HiveScriptIOSchema(List(),List(),Some(org.apache.hadoop.hive.serde2.lazy.LazySimpleSerDe),Some(org.apache.hadoop.hive.serde2.lazy.LazySimpleSerDe),List((field.delim, )),List((field.delim, )),Some(org.apache.hadoop.hive.ql.exec.TextRecordReader),Some(org.apache.hadoop.hive.ql.exec.TextRecordWriter),false) +- FileScan parquet [sh#0L,clk#1L,chg#2L,qey#3,ship#4,chgname#5,sid#6,bid#7,dis#8L,cch#9,wch#10,wid#11L,arank#12L,rtag#13,iid#14,uid#15,pid#16,usid#17,wdid#18,bid#19,oqleft#20,oqright#21,poqvalue#22,tm#23,... 367 more fields] Batched: false, Format: Parquet, Location: InMemoryFileIndex[file:/Users/Downloads/part-r-00093-0ef5d59f-2e08-4085-9b46-458a1652932a.g..., PartitionFilters: [], PushedFilters: [], ReadSchema: struct<sh:bigint,clk:bigint,chg:bigint,qey:string,ship:string,chgname:string,s... {code} In our scenario, parquet has 400 column, this query will take more time. -- 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