Github user hequn8128 commented on a diff in the pull request:
https://github.com/apache/flink/pull/5367#discussion_r164266898
--- Diff:
flink-libraries/flink-table/src/main/scala/org/apache/flink/table/codegen/calls/ScalarOperators.scala
---
@@ -984,6 +987,63 @@ object ScalarOperators {
}
}
+ def generateDot(codeGenerator: CodeGenerator,
+ dot: RexCall,
+ record: GeneratedExpression,
+ subField: GeneratedExpression)
+ : GeneratedExpression = {
+ val nullTerm = newName("isNull")
+ val resultTerm = newName("result")
+ val resultType = FlinkTypeFactory.toTypeInfo(dot.getType)
+ val resultTypeTerm = boxedTypeTermForTypeInfo(resultType)
+ dot.operands.get(0).getType match {
+ case crdt: CompositeRelDataType => {
+ val fieldName = dot.operands.get(1).asInstanceOf[RexLiteral]
+ .getValue.asInstanceOf[NlsString].getValue
+ if (crdt.compositeType.isInstanceOf[TupleTypeInfo[_]]) {
+ return GeneratedExpression(resultTerm, nullTerm,
+ s"""
+ |${record.code}
+ |${subField.code}
+ |${resultTypeTerm} $resultTerm =
+ | (${resultTypeTerm})
${record.resultTerm}.productElement(
+ | ${fieldName.substring(1).toInt} - 1);
+ |boolean $nullTerm =${resultTerm} == null;
+ |""".stripMargin, resultType)
+ } else if (crdt.compositeType.isInstanceOf[CaseClassTypeInfo[_]]) {
+ return GeneratedExpression(resultTerm, nullTerm,
+ s"""
+ |${record.code}
+ |${resultTypeTerm} $resultTerm =
+ | (${resultTypeTerm}) ${record.resultTerm}.${fieldName}();
--- End diff --
NPE will be thrown
---
