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https://issues.apache.org/jira/browse/HIVE-21255?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16782004#comment-16782004
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Jesus Camacho Rodriguez commented on HIVE-21255:
------------------------------------------------
+1
> Remove QueryConditionBuilder in JdbcStorageHandler
> --------------------------------------------------
>
> Key: HIVE-21255
> URL: https://issues.apache.org/jira/browse/HIVE-21255
> Project: Hive
> Issue Type: Improvement
> Reporter: Daniel Dai
> Assignee: Daniel Dai
> Priority: Major
> Attachments: HIVE-21255.1.patch
>
>
> QueryConditionBuilder is not correctly implemented. Always see the following
> exception even the query finish succeeded:
> {code}
> 2019-02-13 01:09:53,406 [ERROR] [TezChild] |jdbc.QueryConditionBuilder|:
> Error during condition build
> java.lang.ArrayIndexOutOfBoundsException: 0
> at java.beans.XMLDecoder.readObject(XMLDecoder.java:250)
> at
> org.apache.hive.storage.jdbc.QueryConditionBuilder.createConditionString(QueryConditionBuilder.java:125)
> at
> org.apache.hive.storage.jdbc.QueryConditionBuilder.buildCondition(QueryConditionBuilder.java:74)
> at
> org.apache.hive.storage.jdbc.conf.JdbcStorageConfigManager.getQueryToExecute(JdbcStorageConfigManager.java:155)
> at
> org.apache.hive.storage.jdbc.dao.GenericJdbcDatabaseAccessor.getRecordIterator(GenericJdbcDatabaseAccessor.java:158)
> at
> org.apache.hive.storage.jdbc.JdbcRecordReader.next(JdbcRecordReader.java:58)
> at
> org.apache.hive.storage.jdbc.JdbcRecordReader.next(JdbcRecordReader.java:35)
> at
> org.apache.hadoop.hive.ql.io.HiveContextAwareRecordReader.doNext(HiveContextAwareRecordReader.java:360)
> at
> org.apache.hadoop.hive.ql.io.HiveRecordReader.doNext(HiveRecordReader.java:79)
> at
> org.apache.hadoop.hive.ql.io.HiveRecordReader.doNext(HiveRecordReader.java:33)
> at
> org.apache.hadoop.hive.ql.io.HiveContextAwareRecordReader.next(HiveContextAwareRecordReader.java:116)
> at
> org.apache.hadoop.mapred.split.TezGroupedSplitsInputFormat$TezGroupedSplitsRecordReader.next(TezGroupedSplitsInputFormat.java:151)
> at
> org.apache.tez.mapreduce.lib.MRReaderMapred.next(MRReaderMapred.java:116)
> at
> org.apache.hadoop.hive.ql.exec.tez.MapRecordSource.pushRecord(MapRecordSource.java:68)
> at
> org.apache.hadoop.hive.ql.exec.tez.MapRecordProcessor.run(MapRecordProcessor.java:426)
> at
> org.apache.hadoop.hive.ql.exec.tez.TezProcessor.initializeAndRunProcessor(TezProcessor.java:267)
> at
> org.apache.hadoop.hive.ql.exec.tez.TezProcessor.run(TezProcessor.java:250)
> at
> org.apache.tez.runtime.LogicalIOProcessorRuntimeTask.run(LogicalIOProcessorRuntimeTask.java:374)
> at
> org.apache.tez.runtime.task.TaskRunner2Callable$1.run(TaskRunner2Callable.java:73)
> at
> org.apache.tez.runtime.task.TaskRunner2Callable$1.run(TaskRunner2Callable.java:61)
> at java.security.AccessController.doPrivileged(Native Method)
> at javax.security.auth.Subject.doAs(Subject.java:422)
> at
> org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1730)
> at
> org.apache.tez.runtime.task.TaskRunner2Callable.callInternal(TaskRunner2Callable.java:61)
> at
> org.apache.tez.runtime.task.TaskRunner2Callable.callInternal(TaskRunner2Callable.java:37)
> at org.apache.tez.common.CallableWithNdc.call(CallableWithNdc.java:36)
> at
> com.google.common.util.concurrent.TrustedListenableFutureTask$TrustedFutureInterruptibleTask.runInterruptibly(TrustedListenableFutureTask.java:108)
> at
> com.google.common.util.concurrent.InterruptibleTask.run(InterruptibleTask.java:41)
> at
> com.google.common.util.concurrent.TrustedListenableFutureTask.run(TrustedListenableFutureTask.java:77)
> at
> java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
> at
> java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
> at java.lang.Thread.run(Thread.java:748)
> {code}
> We don't actually need QueryConditionBuilder when cbo is enabled since
> predicate push down is handled by calcite (HIVE-20822). One can argue when
> cbo is disabled we might still need that since calcite will not do the push
> down, but that's a minor code path and removing QueryConditionBuilder won't
> cause any correctness issue. So I'd like to remove it for simplicity.
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