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Posted to issues@spark.apache.org by "Takeshi Yamamuro (JIRA)" <ji...@apache.org> on 2017/03/01 07:47:45 UTC
[jira] [Commented] (SPARK-19778) alais cannot use in group by
[ https://issues.apache.org/jira/browse/SPARK-19778?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15889700#comment-15889700 ]
Takeshi Yamamuro commented on SPARK-19778:
------------------------------------------
{code}
scala> Seq(("a", 0), ("b", 1)).toDF("key", "value").createOrReplaceTempView("t")
scala> sql("SELECT key AS key1 FROM t GROUP BY key1")
org.apache.spark.sql.AnalysisException: cannot resolve '`key1`' given input columns: [key, value]; line 1 pos 35;
'Aggregate ['key1], [key#15 AS key1#21]
+- SubqueryAlias t
+- Project [_1#12 AS key#15, _2#13 AS value#16]
+- LocalRelation [_1#12, _2#13]
at org.apache.spark.sql.catalyst.analysis.package$AnalysisErrorAt.failAnalysis(package.scala:42)
at org.apache.spark.sql.catalyst.analysis.CheckAnalysis$$anonfun$checkAnalysis$1$$anonfun$apply$2.applyOrElse(CheckAnalysis.scala:75)
at org.apache.spark.sql.catalyst.analysis.CheckAnalysis$$anonfun$checkAnalysis$1$$anonfun$apply$2.applyOrElse(CheckAnalysis.scala:72)
at org.apache.spark.sql.catalyst.trees.TreeNode$$anonfun$transformUp$1.apply(TreeNode.scala:289)
at org.apache.spark.sql.catalyst.trees.TreeNode$$anonfun$transformUp$1.apply(TreeNode.scala:289)
at org.apache.spark.sql.catalyst.trees.CurrentOrigin$.withOrigin(TreeNode.scala:70)
at org.apache.spark.sql
{code}
Aha, it makes some sense to me because, for example, postgresql accepts this query;
{code}
postgres=# create table t(key INT, value INT);
CREATE TABLE
postgres=# insert into t values(1, 0);
INSERT 0 1
postgres=# SELECT key AS key1 FROM t GROUP BY key1;
key1
------
1
(1 row)
{code}
> alais cannot use in group by
> ----------------------------
>
> Key: SPARK-19778
> URL: https://issues.apache.org/jira/browse/SPARK-19778
> Project: Spark
> Issue Type: Improvement
> Components: SQL
> Affects Versions: 2.1.0
> Reporter: xukun
>
> not support “select key as key1 from src group by key1”
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