Github user fhueske commented on a diff in the pull request: https://github.com/apache/flink/pull/1738#discussion_r54430812 --- Diff: flink-libraries/flink-table/src/main/scala/org/apache/flink/api/table/table.scala --- @@ -98,7 +100,19 @@ class Table( .map(toRexNode(_, relBuilder)) relBuilder.project(exprs.toIterable.asJava) - new Table(relBuilder.build(), relBuilder) + var projected = relBuilder.build() + + if(relNode == projected) { + // Calcite's RelBuilder does not translate identity projects even if they rename fields. + // Add a projection ourselves (will be automatically removed by translation rules). + val names = exprs.map(_.asInstanceOf[RexCall].getOperands.get(1) --- End diff -- Woops! Thanks, I'll check that.
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