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  1. Hive
  2. HIVE-10206

Improve Alter Table to not initialize Serde unnecessarily

    Details

    • Type: Improvement
    • Status: Closed
    • Priority: Minor
    • Resolution: Fixed
    • Affects Version/s: 1.1.0
    • Fix Version/s: 1.2.0
    • Labels:
      None

      Description

      Create an avro table with an external avsc file like:

      CREATE  TABLE test(...)
      ROW FORMAT SERDE 
        'org.apache.hadoop.hive.serde2.avro.AvroSerDe' 
      STORED AS INPUTFORMAT 
        'org.apache.hadoop.hive.ql.io.avro.AvroContainerInputFormat' 
      OUTPUTFORMAT 
        'org.apache.hadoop.hive.ql.io.avro.AvroContainerOutputFormat'
      TBLPROPERTIES (
        'avro.schema.url'='file:///Users/szehon/Temp/test.avsc', 
        'kite.compression.type'='snappy', 
        'transient_lastDdlTime'='1427996456')
      

      Delete test.avsc file.

      Try to modify the table properties:

      alter table test set tblproperties ('avro.schema.url'='file:///Users/szehon/Temp/test2.avsc');
      

      Will throw an exception like AvroSerdeException:

        at org.apache.hadoop.hive.serde2.avro.AvroSerdeUtils.determineSchemaOrThrowException(AvroSerdeUtils.java:119)
      	  at org.apache.hadoop.hive.serde2.avro.AvroSerDe.determineSchemaOrReturnErrorSchema(AvroSerDe.java:163)
      	  at org.apache.hadoop.hive.serde2.avro.AvroSerDe.initialize(AvroSerDe.java:101)
      	  at org.apache.hadoop.hive.serde2.avro.AvroSerDe.initialize(AvroSerDe.java:78)
      	  at org.apache.hadoop.hive.serde2.SerDeUtils.initializeSerDe(SerDeUtils.java:520)
      	  at org.apache.hadoop.hive.metastore.MetaStoreUtils.getDeserializer(MetaStoreUtils.java:377)
      	  at org.apache.hadoop.hive.ql.metadata.Table.getDeserializerFromMetaStore(Table.java:274)
      	  at org.apache.hadoop.hive.ql.metadata.Table.getDeserializer(Table.java:256)
      	  at org.apache.hadoop.hive.ql.metadata.Table.getCols(Table.java:595)
      	  at org.apache.hadoop.hive.ql.exec.DDLTask.alterTableOrSinglePartition(DDLTask.java:3383)
      	  at org.apache.hadoop.hive.ql.exec.DDLTask.alterTable(DDLTask.java:3340)
      	  at org.apache.hadoop.hive.ql.exec.DDLTask.execute(DDLTask.java:332)
      	  at org.apache.hadoop.hive.ql.exec.Task.executeTask(Task.java:160)
      	  at org.apache.hadoop.hive.ql.exec.TaskRunner.runSequential(TaskRunner.java:88)
      	  at org.apache.hadoop.hive.ql.Driver.launchTask(Driver.java:1638)
      	  at org.apache.hadoop.hive.ql.Driver.execute(Driver.java:1397)
      	  at org.apache.hadoop.hive.ql.Driver.runInternal(Driver.java:1181)
      	  at org.apache.hadoop.hive.ql.Driver.run(Driver.java:1047)
      	  at org.apache.hadoop.hive.ql.Driver.run(Driver.java:1037)
      	  at org.apache.hadoop.hive.cli.CliDriver.processLocalCmd(CliDriver.java:207)
      	  at org.apache.hadoop.hive.cli.CliDriver.processCmd(CliDriver.java:159)
      	  at org.apache.hadoop.hive.cli.CliDriver.processLine(CliDriver.java:370)
      	  at org.apache.hadoop.hive.cli.CliDriver.executeDriver(CliDriver.java:754)
      	  at org.apache.hadoop.hive.cli.CliDriver.run(CliDriver.java:675)
      	  at org.apache.hadoop.hive.cli.CliDriver.main(CliDriver.java:615)
      	  at sun.reflect.NativeMethodAccessorImpl.invoke0(NativeMethodAccessorImpl.java:-1)
      	  at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
      	  at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
      	  at java.lang.reflect.Method.invoke(Method.java:606)
      	  at org.apache.hadoop.util.RunJar.run(RunJar.java:221)
      	  at org.apache.hadoop.util.RunJar.main(RunJar.java:136)
      

        Attachments

        1. HIVE-10206.2.patch
          5 kB
          Szehon Ho
        2. HIVE-10206.2.patch
          5 kB
          Szehon Ho
        3. HIVE-10206.patch
          5 kB
          Szehon Ho

          Activity

            People

            • Assignee:
              szehon Szehon Ho
              Reporter:
              szehon Szehon Ho
            • Votes:
              0 Vote for this issue
              Watchers:
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              Dates

              • Created:
                Updated:
                Resolved: