padavan created FLINK-31967:
-------------------------------
Summary: SQL with LAG function NullPointerException
Key: FLINK-31967
URL: https://issues.apache.org/jira/browse/FLINK-31967
Project: Flink
Issue Type: Bug
Components: Table SQL / API
Reporter: padavan
I want to make a query with the LAG function. And get Job Exception without any
explanations.
*Code:*
{{private static void t1_LeadLag(DataStream<UserModel> ds,
StreamExecutionEnvironment env) \{
StreamTableEnvironment te = StreamTableEnvironment.create(env);
Table t = te.fromDataStream(ds,
Schema.newBuilder().columnByExpression("proctime", "proctime()").build());
te.createTemporaryView("users", t);
Table res = te.sqlQuery("SELECT userId, `count`,\n" +
" LAG(`count`) OVER (PARTITION BY userId ORDER BY proctime) AS
prev_quantity\n" +
" FROM users");
te.toChangelogStream(res).print();
}}}
*Input:*
{quote}{"userId":3,"count":0,"dt":"2023-04-28T07:44:21.551Z"}
{quote}
*Exception:* I remove part about basic JobExecutionException and kept the
important(i think)
{{Caused by: java.lang.NullPointerException
at
org.apache.flink.table.data.GenericRowData.getInt(GenericRowData.java:149)
at
org.apache.flink.table.data.RowData.lambda$createFieldGetter$245ca7d1$6(RowData.java:245)
at
org$apache$flink$table$runtime$functions$aggregate$LagAggFunction$LagAcc$2$Converter.toExternal(Unknown
Source)
at
org.apache.flink.table.data.conversion.StructuredObjectConverter.toExternal(StructuredObjectConverter.java:101)
at UnboundedOverAggregateHelper$15.setAccumulators(Unknown Source)
at
org.apache.flink.table.runtime.operators.over.ProcTimeUnboundedPrecedingFunction.processElement(ProcTimeUnboundedPrecedingFunction.java:92)
at
org.apache.flink.table.runtime.operators.over.ProcTimeUnboundedPrecedingFunction.processElement(ProcTimeUnboundedPrecedingFunction.java:42)
at
org.apache.flink.streaming.api.operators.KeyedProcessOperator.processElement(KeyedProcessOperator.java:83)
at
org.apache.flink.streaming.runtime.io.RecordProcessorUtils.lambda$getRecordProcessor$0(RecordProcessorUtils.java:60)
at
org.apache.flink.streaming.runtime.tasks.OneInputStreamTask$StreamTaskNetworkOutput.emitRecord(OneInputStreamTask.java:237)
at
org.apache.flink.streaming.runtime.io.AbstractStreamTaskNetworkInput.processElement(AbstractStreamTaskNetworkInput.java:146)
at
org.apache.flink.streaming.runtime.io.AbstractStreamTaskNetworkInput.emitNext(AbstractStreamTaskNetworkInput.java:110)
at
org.apache.flink.streaming.runtime.io.StreamOneInputProcessor.processInput(StreamOneInputProcessor.java:65)
at
org.apache.flink.streaming.runtime.tasks.StreamTask.processInput(StreamTask.java:550)
at
org.apache.flink.streaming.runtime.tasks.mailbox.MailboxProcessor.runMailboxLoop(MailboxProcessor.java:231)
at
org.apache.flink.streaming.runtime.tasks.StreamTask.runMailboxLoop(StreamTask.java:839)
at
org.apache.flink.streaming.runtime.tasks.StreamTask.invoke(StreamTask.java:788)
at
org.apache.flink.runtime.taskmanager.Task.runWithSystemExitMonitoring(Task.java:952)
at org.apache.flink.runtime.taskmanager.Task.restoreAndInvoke(Task.java:931)
at org.apache.flink.runtime.taskmanager.Task.doRun(Task.java:745)
at org.apache.flink.runtime.taskmanager.Task.run(Task.java:562)
at java.base/java.lang.Thread.run(Thread.java:829)}}
--
This message was sent by Atlassian Jira
(v8.20.10#820010)
