Takeshi Yamamuro created SPARK-20963:
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Summary: 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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