twalthr commented on a change in pull request #6815: [FLINK-7062][cep][table]
Added basic support for MATCH_RECOGNIZE
URL: https://github.com/apache/flink/pull/6815#discussion_r225600574
##########
File path:
flink-libraries/flink-table/src/main/scala/org/apache/flink/table/codegen/MatchCodeGenerator.scala
##########
@@ -245,41 +318,58 @@ class MatchCodeGenerator(
""
}
- val code = s"""
- |$listTypeTerm $listName = new java.util.ArrayList();
- |for ($eventTypeTerm $eventNameTerm :
$contextTerm.getEventsForPattern("$patternName")) {
- | $listName.add($eventNameTerm);
+ val escapedPatternName =
StringEscapeUtils.ESCAPE_JAVA.translate(patternName)
+ reusablePerRecordStatements.add(s"""
+ |this.$listName = new java.util.ArrayList();
+ |for ($eventTypeTerm $eventNameTerm :
+ | $contextTerm.getEventsForPattern("$escapedPatternName")) {
+ | $listName.add($eventNameTerm);
|}
|$addCurrent
- |""".stripMargin
+ |""".stripMargin)
- GeneratedExpression(listName, "false", code, new ListTypeInfo(input))
+ GeneratedCode(s"this.$listName", NO_CODE)
}
- private def generateMeasurePatternVariableExp(patternName: String):
GeneratedExpression = {
+ private def generateMeasurePatternVariableExp(patternName: String):
GeneratedCode = {
val listTypeTerm = classOf[java.util.List[_]].getCanonicalName
Review comment:
For consistency we can also inline this, because for `Collections` or
`ArrayList` we also do that.
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