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https://issues.apache.org/jira/browse/FLINK-7062?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16647603#comment-16647603
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ASF GitHub Bot commented on FLINK-7062:
---------------------------------------
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_r224353161
##########
File path:
flink-libraries/flink-cep/src/test/java/org/apache/flink/cep/nfa/AfterMatchSkipITCase.java
##########
@@ -548,6 +548,32 @@ public boolean filter(Event value) throws Exception {
));
}
+ @Test(expected = FlinkRuntimeException.class)
+ public void testSkipToFirstElementOfMatch() throws Exception {
+ List<StreamRecord<Event>> streamEvents = new ArrayList<>();
+
+ Event a1 = new Event(1, "a1", 0.0);
+
+ streamEvents.add(new StreamRecord<Event>(a1));
+
+ Pattern<Event, ?> pattern = Pattern.<Event>begin("a",
+
AfterMatchSkipStrategy.skipToFirst("a").throwExceptionOnMiss()
+ ).where(
+ new SimpleCondition<Event>() {
+
+ @Override
+ public boolean filter(Event value) throws
Exception {
+ return value.getName().contains("a");
+ }
+ }
+ );
+ NFA<Event> nfa = compile(pattern, false);
+
+ feedNFA(streamEvents, nfa, pattern.getAfterMatchSkipStrategy());
+
+ //exception should be thrown
Review comment:
It would be a better comment if you explain *why* an exception should be
thrown.
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> Support the basic functionality of MATCH_RECOGNIZE
> --------------------------------------------------
>
> Key: FLINK-7062
> URL: https://issues.apache.org/jira/browse/FLINK-7062
> Project: Flink
> Issue Type: Sub-task
> Components: CEP, Table API & SQL
> Reporter: Dian Fu
> Assignee: Dian Fu
> Priority: Major
> Labels: pull-request-available
>
> In this JIRA, we will support the basic functionality of {{MATCH_RECOGNIZE}}
> in Flink SQL API which includes the support of syntax {{MEASURES}},
> {{PATTERN}} and {{DEFINE}}. This would allow users write basic cep use cases
> with SQL like the following example:
> {code}
> SELECT T.aid, T.bid, T.cid
> FROM MyTable
> MATCH_RECOGNIZE (
> MEASURES
> A.id AS aid,
> B.id AS bid,
> C.id AS cid
> PATTERN (A B C)
> DEFINE
> A AS A.name = 'a',
> B AS B.name = 'b',
> C AS C.name = 'c'
> ) AS T
> {code}
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