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From "yuemeng (JIRA)" <j...@apache.org>
Subject [jira] [Assigned] (FLINK-7309) NullPointerException in CodeGenUtils.timePointToInternalCode() generated code
Date Thu, 03 Aug 2017 09:06:00 GMT

     [ https://issues.apache.org/jira/browse/FLINK-7309?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

yuemeng reassigned FLINK-7309:
------------------------------

    Assignee: yuemeng  (was: Sihua Zhou)

> NullPointerException in CodeGenUtils.timePointToInternalCode() generated code
> -----------------------------------------------------------------------------
>
>                 Key: FLINK-7309
>                 URL: https://issues.apache.org/jira/browse/FLINK-7309
>             Project: Flink
>          Issue Type: Bug
>          Components: Table API & SQL
>    Affects Versions: 1.3.1
>            Reporter: Liangliang Chen
>            Assignee: yuemeng
>            Priority: Critical
>
> The code generated by CodeGenUtils.timePointToInternalCode() will cause a NullPointerException
when SQL table field type is `TIMESTAMP` and the field value is `null`.
> Example for reproduce:
> {code}
> object StreamSQLExample {
>   def main(args: Array[String]): Unit = {
>     val env = StreamExecutionEnvironment.getExecutionEnvironment
>     val tEnv = TableEnvironment.getTableEnvironment(env)
>     // null field value
>     val orderA: DataStream[Order] = env.fromCollection(Seq(
>       Order(null, "beer", 3)))
>       
>     tEnv.registerDataStream("OrderA", orderA, 'ts, 'product, 'amount)
>     val result = tEnv.sql("SELECT * FROM OrderA")
>     result.toAppendStream[Order].print()
>     
>     env.execute()
>   }
>   case class Order(ts: Timestamp, product: String, amount: Int)
> }
> {code}
> In the above example, timePointToInternalCode() will generated some statements like this:
> {code}
> ...
>           long result$1 = org.apache.calcite.runtime.SqlFunctions.toLong((java.sql.Timestamp)
in1.ts());
>           boolean isNull$2 = (java.sql.Timestamp) in1.ts() == null;
> ...
> {code}
> so, the NPE will happen when in1.ts() is null.



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