Github user andrewor14 commented on a diff in the pull request:
https://github.com/apache/spark/pull/13415#discussion_r65617886
--- Diff:
sql/core/src/main/scala/org/apache/spark/sql/execution/SparkSqlParser.scala ---
@@ -880,6 +880,23 @@ class SparkSqlAstBuilder(conf: SQLConf) extends
AstBuilder {
val properties =
Option(ctx.tablePropertyList).map(visitPropertyKeyValues).getOrElse(Map.empty)
val selectQuery = Option(ctx.query).map(plan)
+ // Ensuring whether no duplicate name is used in table definition
+ val colNames = cols.map(_.name)
+ if (colNames.length != colNames.distinct.length) {
+ val duplicateColumns = colNames.groupBy(identity).collect {
+ case (x, ys) if ys.length > 1 => "\"" + x + "\""
+ }
+ throw new ParseException(s"Duplicate column name key(s) in the table
definition: " +
--- End diff --
also would be good to throw `operationNotAllowed` here
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