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From GitBox <...@apache.org>
Subject [GitHub] twalthr commented on a change in pull request #7177: [FLINK-7599] [table] Support for aggregates in MATCH_RECOGNIZE
Date Tue, 04 Dec 2018 16:02:01 GMT
twalthr commented on a change in pull request #7177: [FLINK-7599] [table] Support for aggregates
in MATCH_RECOGNIZE
URL: https://github.com/apache/flink/pull/7177#discussion_r238713688
 
 

 ##########
 File path: flink-libraries/flink-table/src/main/scala/org/apache/flink/table/codegen/MatchCodeGenerator.scala
 ##########
 @@ -533,45 +618,49 @@ class MatchCodeGenerator(
       reusablePerRecordStatements += codeForAgg
 
       val defaultValue = primitiveDefaultValue(singleResultType)
-      val codeForSingleAgg =
+      val codeForSingleAgg = if (nullCheck) {
         j"""
            |boolean $singleResultNullTerm;
-           |$singleResultTypeTerm $singleResultTerm = ($singleResultTypeTerm) $resultRowTerm
-           |  .getField(${aggregates.size});
-           |if ($singleResultTerm != null) {
+           |$primitiveSingleResultTypeTerm $singleResultTerm;
+           |if ($resultRowTerm.getField(${aggregates.size}) != null) {
+           |  $singleResultTerm = ($boxedSingleResultTypeTerm) $resultRowTerm
+           |    .getField(${aggregates.size});
            |  $singleResultNullTerm = false;
            |} else {
            |  $singleResultNullTerm = true;
            |  $singleResultTerm = $defaultValue;
            |}
            |""".stripMargin
+      } else {
+        j"""
+           |boolean $singleResultNullTerm = false;
 
 Review comment:
   This line can be dropped. The null term is not evaluated if nullCheck is disabled.

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