org.apache.spark.sql.AnalysisException

unresolved operator 'Union;

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    • org.apache.spark.sql.AnalysisException: unresolved operator 'Union; at org.apache.spark.sql.catalyst.analysis.CheckAnalysis$class.failAnalysis(CheckAnalysis.scala:37) at org.apache.spark.sql.catalyst.analysis.Analyzer.failAnalysis(Analyzer.scala:44) at org.apache.spark.sql.catalyst.analysis.CheckAnalysis$$anonfun$checkAnalysis$1.apply(CheckAnalysis.scala:174) at org.apache.spark.sql.catalyst.analysis.CheckAnalysis$$anonfun$checkAnalysis$1.apply(CheckAnalysis.scala:49) at org.apache.spark.sql.catalyst.trees.TreeNode.foreachUp(TreeNode.scala:103)

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