FlinkSQL/TableAPI 添加配置

在使用FlinkSQL是向sink表中某个非空字段中插入了null值，收到异常信息

org.apache.flink.table.api.TableException: Column 'sub_id' is NOT NULL, however, a null value is being written into it. You can set job configuration 'table.exec.sink.not-null-enforcer'='drop' to suppress this exception and drop such records silently.
    at org.apache.flink.table.runtime.operators.sink.SinkNotNullEnforcer.filter(SinkNotNullEnforcer.java:58)
    at org.apache.flink.table.runtime.operators.sink.SinkOperator.processElement(SinkOperator.java:71)
    at org.apache.flink.streaming.runtime.tasks.CopyingChainingOutput.pushToOperator(CopyingChainingOutput.java:71)
    at org.apache.flink.streaming.runtime.tasks.CopyingChainingOutput.collect(CopyingChainingOutput.java:46)
    at org.apache.flink.streaming.runtime.tasks.CopyingChainingOutput.collect(CopyingChainingOutput.java:26)
    at org.apache.flink.streaming.api.operators.CountingOutput.collect(CountingOutput.java:52)
    at org.apache.flink.streaming.api.operators.CountingOutput.collect(CountingOutput.java:30)
    at StreamExecCalc$692.processElement(Unknown Source)
    at org.apache.flink.streaming.runtime.tasks.CopyingChainingOutput.pushToOperator(CopyingChainingOutput.java:71)
    at org.apache.flink.streaming.runtime.tasks.CopyingChainingOutput.collect(CopyingChainingOutput.java:46)
    at org.apache.flink.streaming.runtime.tasks.CopyingChainingOutput.collect(CopyingChainingOutput.java:26)
    at org.apache.flink.streaming.api.operators.CountingOutput.collect(CountingOutput.java:52)
    at org.apache.flink.streaming.api.operators.CountingOutput.collect(CountingOutput.java:30)
    at org.apache.flink.streaming.api.operators.StreamSourceContexts$ManualWatermarkContext.processAndCollectWithTimestamp(StreamSourceContexts.java:310)
    at org.apache.flink.streaming.api.operators.StreamSourceContexts$WatermarkContext.collectWithTimestamp(StreamSourceContexts.java:409)
    at org.apache.flink.streaming.connectors.kafka.internals.AbstractFetcher.emitRecordsWithTimestamps(AbstractFetcher.java:352)
    at org.apache.flink.streaming.connectors.kafka.internals.KafkaFetcher.partitionConsumerRecordsHandler(KafkaFetcher.java:181)
    at org.apache.flink.streaming.connectors.kafka.internals.KafkaFetcher.runFetchLoop(KafkaFetcher.java:137)
    at org.apache.flink.streaming.connectors.kafka.FlinkKafkaConsumerBase.run(FlinkKafkaConsumerBase.java:761)
    at org.apache.flink.streaming.api.operators.StreamSource.run(StreamSource.java:100)
    at org.apache.flink.streaming.api.operators.StreamSource.run(StreamSource.java:63)
    at org.apache.flink.streaming.runtime.tasks.SourceStreamTask$LegacySourceFunctionThread.run(SourceStreamTask.java:215)

解决方式：

 执行后SQL语句能正常运行。类似的参数设置

SET execution.result-mode=table;

SET execution.result-mode=tableau;

SET table.sql-dialect=hive;

除了在SQL中使用这种设定方式，在TalbeAPI中可以可以设定一些参数：

// instantiate table environment
val tEnv: TableEnvironment = ...

// access flink configuration
val configuration = tEnv.getConfig().getConfiguration()
// set low-level key-value options
configuration.setString("table.exec.mini-batch.enabled", "true")
configuration.setString("table.exec.mini-batch.allow-latency", "5 s")
configuration.setString("table.exec.mini-batch.size", "5000")

参考：

https://ci.apache.org/projects/flink/flink-docs-release-1.12/zh/dev/table/streaming/query_configuration.html

https://www.cnblogs.com/qiu-hua/p/14053999.html