twalthr commented on a change in pull request #7189: [FLINK-10597][table]
Enabled UDFs support in MATCH_RECOGNIZE
URL: https://github.com/apache/flink/pull/7189#discussion_r237402448
##########
File path:
flink-libraries/flink-table/src/test/scala/org/apache/flink/table/runtime/stream/sql/MatchRecognizeITCase.scala
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@@ -543,10 +543,79 @@ class MatchRecognizeITCase extends
StreamingWithStateTestBase {
// We do not assert the proctime in the result, cause it is currently
// accessed from System.currentTimeMillis(), so there is no graceful way
to assert the proctime
}
+
+ @Test
+ def testRichUdfs(): Unit = {
+ val env = StreamExecutionEnvironment.getExecutionEnvironment
+ env.setParallelism(1)
+ val tEnv = TableEnvironment.getTableEnvironment(env)
+ tEnv.getConfig.setMaxGeneratedCodeLength(1)
+ StreamITCase.clear
+
+ val data = new mutable.MutableList[(Int, String, Long)]
+ data.+=((1, "a", 1))
+ data.+=((2, "a", 1))
+ data.+=((3, "a", 1))
+ data.+=((4, "a", 1))
+ data.+=((5, "a", 1))
+ data.+=((6, "b", 1))
+ data.+=((7, "a", 1))
+ data.+=((8, "a", 1))
+ data.+=((9, "f", 1))
+
+ val t = env.fromCollection(data)
+ .toTable(tEnv, 'id, 'name, 'price, 'proctime.proctime)
+ tEnv.registerTable("MyTable", t)
+ tEnv.registerFunction("prefix", new RichScalarFunc)
+ val prefix = "PREF"
+ UserDefinedFunctionTestUtils
+ .setJobParameters(env, Map("prefix" -> prefix))
+
+ val sqlQuery =
+ s"""
+ |SELECT *
+ |FROM MyTable
+ |MATCH_RECOGNIZE (
+ | ORDER BY proctime
+ | MEASURES
+ | FIRST(id) as firstId,
+ | prefix(A.name) as prefixedNameA,
+ | LAST(id) as lastId
+ | AFTER MATCH SKIP PAST LAST ROW
+ | PATTERN (A+ C)
+ | DEFINE
+ | A AS prefix(A.name) = '$prefix:a'
+ |) AS T
+ |""".stripMargin
+
+ val result = tEnv.sqlQuery(sqlQuery).toAppendStream[Row]
+ result.addSink(new StreamITCase.StringSink[Row])
+ env.execute()
+
+ val expected = mutable.MutableList("1,PREF:a,6", "7,PREF:a,9")
+ assertEquals(expected.sorted, StreamITCase.testResults.sorted)
+ }
}
class ToMillis extends ScalarFunction {
def eval(t: Timestamp): Long = {
t.toInstant.toEpochMilli +
TimeZone.getDefault.getOffset(t.toInstant.toEpochMilli)
}
}
+
+private class RichScalarFunc extends ScalarFunction {
Review comment:
Give more meaningful name.
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