sunjincheng121 commented on a change in pull request #7167: [FLINK-10973]
[table] Add support for map to table API
URL: https://github.com/apache/flink/pull/7167#discussion_r272046322
##########
File path:
flink-table/flink-table-planner/src/main/scala/org/apache/flink/table/plan/ProjectionTranslator.scala
##########
@@ -136,4 +136,21 @@ object ProjectionTranslator {
case e: PlannerExpression => e
}
}
+
+
+ /**
+ * Extracts the leading non-alias expression.
+ *
+ * @param expr the expression to extract
+ * @return the top non-alias expression
+ */
+ def getLeadingNonAliasExpr(expr: Expression): Expression = {
+ expr match {
+ case callExpr: CallExpression if callExpr.getFunctionDefinition.equals(
+ BuiltInFunctionDefinitions.AS) =>
+ getLeadingNonAliasExpr(callExpr.getChildren.get(0))
+
Review comment:
It's better to remove the empty line, right?
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