Github user kevinyu98 commented on a diff in the pull request: https://github.com/apache/spark/pull/20795#discussion_r175158413 --- Diff: sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/analysis/Analyzer.scala --- @@ -1192,11 +1195,24 @@ class Analyzer( * @see https://issues.apache.org/jira/browse/SPARK-19737 */ object LookupFunctions extends Rule[LogicalPlan] { - override def apply(plan: LogicalPlan): LogicalPlan = plan.transformAllExpressions { - case f: UnresolvedFunction if !catalog.functionExists(f.name) => - withPosition(f) { - throw new NoSuchFunctionException(f.name.database.getOrElse("default"), f.name.funcName) - } + override def apply(plan: LogicalPlan): LogicalPlan = { + val catalogFunctionNameSet = new mutable.HashSet[FunctionIdentifier]() + plan.transformAllExpressions { + case f: UnresolvedFunction + if catalogFunctionNameSet.contains(normalizeFuncName(f.name)) => f + case f: UnresolvedFunction if catalog.functionExists(f.name) => + catalogFunctionNameSet.add(normalizeFuncName(f.name)) + f + case f: UnresolvedFunction => + withPosition(f) { + throw new NoSuchFunctionException(f.name.database.getOrElse("default"), --- End diff -- @viirya @dilipbiswal ok, I will change this.
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