Github user fhueske commented on a diff in the pull request:
https://github.com/apache/flink/pull/3694#discussion_r110340764
--- Diff:
flink-libraries/flink-table/src/main/scala/org/apache/flink/table/codegen/CodeGenerator.scala
---
@@ -403,6 +403,41 @@ class CodeGenerator(
| }""".stripMargin
}
+ def generateMergeTwoRows(
+ accTypes: Array[String],
+ aggs: Array[String]): String = {
+
+ val sig: String =
+ j"""
+ | public org.apache.flink.types.Row mergeTwoRows(
+ | org.apache.flink.types.Row a,
+ | org.apache.flink.types.Row b)
+ | """.stripMargin
+ val merge: String = {
+ for (i <- aggs.indices) yield
+ j"""
+ | ${accTypes(i)} aAcc$i = (${accTypes(i)}) a.getField($i);
+ | ${accTypes(i)} bAcc$i = (${accTypes(i)}) b.getField($i);
+ | java.util.ArrayList<${accTypes(i)}> accumulators$i
--- End diff --
Can we create a reusable list for each aggregation function?
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