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Posted to issues@hive.apache.org by "Sergio Peña (JIRA)" <ji...@apache.org> on 2015/04/06 17:36:13 UTC
[jira] [Commented] (HIVE-10206) Improve Alter Table to not
initialize Serde unnecessarily
[ https://issues.apache.org/jira/browse/HIVE-10206?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14481312#comment-14481312 ]
Sergio Peña commented on HIVE-10206:
------------------------------------
Hey [~szehon]
Looks good to me. +1
> Improve Alter Table to not initialize Serde unnecessarily
> ---------------------------------------------------------
>
> Key: HIVE-10206
> URL: https://issues.apache.org/jira/browse/HIVE-10206
> Project: Hive
> Issue Type: Improvement
> Components: Serializers/Deserializers
> Affects Versions: 1.1.0
> Reporter: Szehon Ho
> Assignee: Ferdinand Xu
> Priority: Minor
> Attachments: HIVE-10206.patch
>
>
> Create an avro table with an external avsc file like:
> {noformat}
> 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')
> {noformat}
> Delete test.avsc file.
> Try to modify the table properties:
> {noformat}
> alter table test set tblproperties ('avro.schema.url'='file:///Users/szehon/Temp/test2.avsc');
> {noformat}
> Will throw an exception like AvroSerdeException:
> {noformat}
> 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)
> {noformat}
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