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Posted to issues@spark.apache.org by "Sean Owen (JIRA)" <ji...@apache.org> on 2017/06/07 09:35:18 UTC
[jira] [Updated] (SPARK-20963) Support column aliases for aliased
relation in FROM clause
[ https://issues.apache.org/jira/browse/SPARK-20963?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Sean Owen updated SPARK-20963:
------------------------------
Fix Version/s: (was: 2.3.0)
> Support column aliases for aliased relation in FROM clause
> ----------------------------------------------------------
>
> Key: SPARK-20963
> URL: https://issues.apache.org/jira/browse/SPARK-20963
> Project: Spark
> Issue Type: Sub-task
> Components: SQL
> Affects Versions: 2.1.1
> Reporter: Takeshi Yamamuro
>
> Currently, we do not support column aliases for aliased relation;
> {code}
> scala> Seq((1, 2), (2, 0)).toDF("id", "value").createOrReplaceTempView("t1")
> scala> Seq((1, 2), (2, 0)).toDF("id", "value").createOrReplaceTempView("t2")
> scala> sql("SELECT * FROM (t1 JOIN t2)")
> scala> sql("SELECT * FROM (t1 INNER JOIN t2 ON t1.id = t2.id) AS t(a, b, c, d)").show
> org.apache.spark.sql.catalyst.parser.ParseException:
> mismatched input '(' expecting {<EOF>, ',', 'WHERE', 'GROUP', 'ORDER', 'HAVING', 'LIMIT', 'JOIN', 'CROSS', 'INNER', 'LEFT', 'RIGHT', 'FULL', 'NATURAL', 'LATERAL', 'WINDOW', 'UNION', 'EXCEPT', 'MINUS', 'INTERSECT', 'SORT', 'CLUSTER', 'DISTRIBUTE', 'ANTI'}(line 1, pos 54)
> == SQL ==
> SELECT * FROM (t1 INNER JOIN t2 ON t1.id = t2.id) AS t(a, b, c, d)
> ------------------------------------------------------^^^
> at org.apache.spark.sql.catalyst.parser.ParseException.withCommand(ParseDriver.scala:217)
> at org.apache.spark.sql.catalyst.parser.AbstractSqlParser.parse(ParseDriver.scala:114)
> at org.apache.spark.sql.execution.SparkSqlParser.parse(Spa
> {code}
> We could support this by referring;
> http://docs.aws.amazon.com/redshift/latest/dg/r_FROM_clause30.html
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