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[jira] [Created] (FLINK-10143) date_format


sean.miao created FLINK-10143:
---------------------------------

             Summary: date_format
                 Key: FLINK-10143
                 URL: https://issues.apache.org/jira/browse/FLINK-10143
             Project: Flink
          Issue Type: Bug
          Components: Table API & SQL
    Affects Versions: 1.6.0
            Reporter: sean.miao
         Attachments: image-2018-08-14-18-11-40-144.png

"insert into mtmp_sink SELECT DATE_FORMAT(time_str2tms,'%Y%d%m')  FROM mtmp_source";

We have recently used the date_format method like the above sql, but found that this method does not work.

!image-2018-08-14-18-11-40-144.png!

error msg is :

org.apache.flink.table.codegen.CodeGenException: Incompatible types of expression and result type. Expression[GeneratedExpression(result$6,isNull$7,


java.lang.String result$4 = "%Y, %d %M";

boolean isNull$7 = isNull$3 || false;
java.lang.String result$6 = "";
if (!isNull$7) {
 
 result$6 = dateFormatter$5.print(result$2);
 
isNull$7 = (result$6 == null);
 
}
,String,false)] type is [String], result type is [Timestamp]
 at org.apache.flink.table.codegen.CodeGenerator$$anonfun$generateResultExpression$2.apply(CodeGenerator.scala:380)
 at org.apache.flink.table.codegen.CodeGenerator$$anonfun$generateResultExpression$2.apply(CodeGenerator.scala:378)
 at scala.collection.mutable.ResizableArray$class.foreach(ResizableArray.scala:59)
 at scala.collection.mutable.ArrayBuffer.foreach(ArrayBuffer.scala:48)
 at org.apache.flink.table.codegen.CodeGenerator.generateResultExpression(CodeGenerator.scala:378)
 at org.apache.flink.table.codegen.CodeGenerator.generateResultExpression(CodeGenerator.scala:336)
 at org.apache.flink.table.plan.nodes.CommonCalc$class.generateFunction(CommonCalc.scala:45)
 at org.apache.flink.table.plan.nodes.datastream.DataStreamCalc.generateFunction(DataStreamCalc.scala:43)
 at org.apache.flink.table.plan.nodes.datastream.DataStreamCalc.translateToPlan(DataStreamCalc.scala:116)
 at org.apache.flink.table.plan.nodes.datastream.DataStreamGroupAggregate.translateToPlan(DataStreamGroupAggregate.scala:113)
 at org.apache.flink.table.plan.nodes.datastream.DataStreamCalc.translateToPlan(DataStreamCalc.scala:97)
 at org.apache.flink.table.api.StreamTableEnvironment.translateToCRow(StreamTableEnvironment.scala:999)
 at org.apache.flink.table.api.StreamTableEnvironment.translate(StreamTableEnvironment.scala:926)
 at org.apache.flink.table.api.StreamTableEnvironment.writeToSink(StreamTableEnvironment.scala:372)
 at org.apache.flink.table.api.TableEnvironment.insertInto(TableEnvironment.scala:786)
 at org.apache.flink.table.api.TableEnvironment.sqlUpdate(TableEnvironment.scala:723)
 at org.apache.flink.table.api.TableEnvironment.sqlUpdate(TableEnvironment.scala:683)



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