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_r272045373
##########
File path:
flink-table/flink-table-planner/src/main/scala/org/apache/flink/table/api/tableImpl.scala
##########
@@ -462,6 +463,23 @@ class TableImpl(
wrap(operationTreeBuilder.dropColumns(fields, operationTree))
}
+ override def map(mapFunction: String): Table = {
+ map(ExpressionParser.parseExpression(mapFunction))
+ }
+
+ override def map(mapFunction: Expression): Table = {
+ val resolvedMapFunction = callResolver.visit(mapFunction)
+ getLeadingNonAliasExpr(resolvedMapFunction) match {
+ case callExpr: CallExpression if callExpr.getFunctionDefinition.getType
==
+ FunctionDefinition.Type.SCALAR_FUNCTION =>
+
+ case _ =>
+ throw new ValidationException("Only ScalarFunction can be used in
map.")
Review comment:
`Only ScalarFunction can be used in the map operator` ?
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