Github user fhueske commented on a diff in the pull request:
https://github.com/apache/flink/pull/3623#discussion_r109964147
--- Diff:
flink-libraries/flink-table/src/test/scala/org/apache/flink/table/utils/UserDefinedTableFunctions.scala
---
@@ -109,6 +110,133 @@ class TableFunc3(data: String, conf: Map[String,
String]) extends TableFunction[
}
}
+class DynamicSchema extends TableFunction[Row] {
+
+ def eval(str: String, column: Int): Unit = {
+ if (str.contains("#")) {
+ str.split("#").foreach({ s =>
+ val row = new Row(column)
+ row.setField(0, s)
+ var i = 0
+ for (i <- 1 until column) {
+ row.setField(i, s.length)
+ }
+ collect(row)
+ })
+ }
+ }
+
+ override def getResultType(arguments: java.util.List[AnyRef]):
TypeInformation[Row] = {
+ val column = arguments.get(1).asInstanceOf[Int]
+ val basicTypeInfos = new Array[TypeInformation[_]](column)
+ basicTypeInfos(0) = BasicTypeInfo.STRING_TYPE_INFO
+ for (i <- 1 until column) {
+ basicTypeInfos(i) = BasicTypeInfo.INT_TYPE_INFO
+ }
+ new RowTypeInfo(basicTypeInfos: _*)
+ }
+}
+
+class DynamicSchema0 extends TableFunction[Row] {
+
+ def eval(str: String, cols: String): Unit = {
+ val columns = cols.split(",")
+
+ if (str.contains("#")) {
+ str.split("#").foreach({ s =>
+ val row = new Row(columns.length)
+ row.setField(0, s)
+ for (i <- 1 until columns.length) {
+ if (columns(i).equals("string")) {
+ row.setField(i, s.length.toString)
+ } else if (columns(i).equals("int")) {
+ row.setField(i, s.length)
+ }
+ }
+ collect(row)
+ })
+ }
+ }
+
+ override def getResultType(arguments: java.util.List[AnyRef]):
TypeInformation[Row] = {
+ val columnStr = arguments.get(1).asInstanceOf[String]
+ val columns = columnStr.split(",")
+
+ val basicTypeInfos = new Array[TypeInformation[_]](columns.length)
--- End diff --
can be simplified to
```
val basicTypeInfos = for (c <- columns) yield c match {
case "string" => BasicTypeInfo.STRING_TYPE_INFO
case "int" => BasicTypeInfo.INT_TYPE_INFO
}
```
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