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https://issues.apache.org/jira/browse/FLINK-7599?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16703165#comment-16703165
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ASF GitHub Bot commented on FLINK-7599:
---------------------------------------
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_r237466297
##########
File path:
flink-libraries/flink-table/src/main/scala/org/apache/flink/table/codegen/MatchCodeGenerator.scala
##########
@@ -445,4 +498,223 @@ class MatchCodeGenerator(
generateFieldAccess(patternVariableRef.copy(code = NO_CODE),
fieldRef.getIndex)
}
+
+ class AggBuilder(variable: String) {
Review comment:
Can you add a high level description how aggregates work in this code
generator? Maybe here or even for the top-level class. Otherwise we don't
remember it when we have to touch this class again. Maybe a little example code
that explains which methods, classes, fields are generated and why? Not super
detailed but at least to understand the concept. Actually this is also missing
in the AggregationCodeGenerator.
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> Support aggregation functions in the define and measures clause of
> MatchRecognize
> ---------------------------------------------------------------------------------
>
> Key: FLINK-7599
> URL: https://issues.apache.org/jira/browse/FLINK-7599
> Project: Flink
> Issue Type: Sub-task
> Components: CEP, Table API & SQL
> Reporter: Dian Fu
> Assignee: Dawid Wysakowicz
> Priority: Major
> Labels: pull-request-available
> Fix For: 1.8.0
>
>
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