Dawid Wysakowicz created FLINK-15801:
----------------------------------------
Summary: Timestamp extractor created from properties does not work
for some physical fields
Key: FLINK-15801
URL: https://issues.apache.org/jira/browse/FLINK-15801
Project: Flink
Issue Type: Bug
Components: Table SQL / API
Affects Versions: 1.9.0, 1.10.0
Reporter: Dawid Wysakowicz
Fix For: 1.11.0, 1.9.3, 1.10.1
If a timestamp extractor is created from properties it can not use a physical
field if the name of that field is equal to the logical field of the rowtime
field.
The code below fails:
{code}
StreamExecutionEnvironment streamExecutionEnvironment =
StreamExecutionEnvironment.getExecutionEnvironment();
streamExecutionEnvironment.setStreamTimeCharacteristic(TimeCharacteristic.EventTime);
StreamTableEnvironment fsTableEnv =
StreamTableEnvironment.create(streamExecutionEnvironment);
String allEventsTable = "allEventsTable";
fsTableEnv.connect(new Kafka()
.version("universal")
.topic("events")
.property("zookeeper.connect", "")
.property("bootstrap.servers", "localhost:9092")
.property("group.id", "dummyquery").startFromLatest())
.withSchema(new Schema()
.field("rule_id", Types.INT)
.field("sourceAddress", Types.STRING)
.field("deviceProduct", Types.STRING)
.field("destHost", Types.STRING)
.field("extra", Types.STRING)
.field("rowtime", Types.SQL_TIMESTAMP)
.rowtime(new
Rowtime().timestampsFromField("rowtime").watermarksPeriodicBounded(2000))
)
.withFormat(new
Json().failOnMissingField(false).deriveSchema())
.inAppendMode()
.registerTableSource(allEventsTable);
Table result = fsTableEnv.sqlQuery("select * from
allEventsTable where sourceAddress='12345431'");
DataStream alert = fsTableEnv.toAppendStream(result, Row.class);
alert.print();
{code}
with exception:
{code}
Exception in thread "main" org.apache.flink.table.api.ValidationException:
Field 'rowtime' could not be resolved by the field mapping.
at
org.apache.flink.table.sources.TableSourceValidation.resolveField(TableSourceValidation.java:245)
at
org.apache.flink.table.sources.TableSourceValidation.lambda$validateTimestampExtractorArguments$6(TableSourceValidation.java:202)
at java.util.stream.ReferencePipeline$3$1.accept(ReferencePipeline.java:193)
at
java.util.Spliterators$ArraySpliterator.forEachRemaining(Spliterators.java:948)
at java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:481)
at
java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:471)
at java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:545)
at
java.util.stream.AbstractPipeline.evaluateToArrayNode(AbstractPipeline.java:260)
at java.util.stream.ReferencePipeline.toArray(ReferencePipeline.java:438)
{code}
The problem is that the field is removed from the {{FieldMapping}} in
{{org.apache.flink.table.descriptors.SchemaValidator#deriveFieldMapping}}.
One possible solution could be to add:
{code}
if (isRowtime) {
Optional<String> timestampSource =
properties.getOptionalString(SCHEMA + "." + i + "." + ROWTIME_TIMESTAMPS_FROM);
timestampSource.ifPresent(s ->
mapping.put(s, s));
}
{code}
We should also consider the case what happens if we compute generated columns
on fields that were pruned in a similar way.
--
This message was sent by Atlassian Jira
(v8.3.4#803005)
