Github user huawei-flink commented on a diff in the pull request:
https://github.com/apache/flink/pull/3771#discussion_r113472029
--- Diff:
flink-libraries/flink-table/src/main/scala/org/apache/flink/table/runtime/aggregate/GeneratedAggregations.scala
---
@@ -20,16 +20,22 @@ package org.apache.flink.table.runtime.aggregate
import org.apache.flink.api.common.functions.Function
import org.apache.flink.types.Row
+import org.apache.flink.api.common.functions.RuntimeContext
/**
* Base class for code-generated aggregations.
*/
abstract class GeneratedAggregations extends Function {
+
+ /**
+ * Initialize the state for the distinct aggregation check
+ *
+ * @param ctx the runtime context to retrieve and initialize the
distinct states
+ */
+ def initialize(ctx: RuntimeContext)
/**
- * Sets the results of the aggregations (partial or final) to the
output row.
--- End diff --
probably an error in the merging. sorry about that
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