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https://issues.apache.org/jira/browse/HIVE-2752?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13951781#comment-13951781
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Lefty Leverenz commented on HIVE-2752:
--------------------------------------
Updated in two wikidocs:
{quote}
In Hive 0.12.0 and earlier releases, the index name is case-sensitive for
CREATE INDEX and DROP INDEX statements. However, ALTER INDEX requires an index
name that was created with lowercase letters (see HIVE-2752). This bug is fixed
in Hive 0.13.0 by making index names case-insensitive for all HiveQL
statements. For releases prior to 0.13.0, the best practice is to use lowercase
letters for all index names.
{quote}
* [DDL: Create/Drop/AlterIndex
|https://cwiki.apache.org/confluence/display/Hive/LanguageManual+DDL#LanguageManualDDL-Create/Drop/AlterIndex]
* [Indexing: Simple Examples
|https://cwiki.apache.org/confluence/display/Hive/LanguageManual+Indexing#LanguageManualIndexing-SimpleExamples]
> Index names are case sensitive
> ------------------------------
>
> Key: HIVE-2752
> URL: https://issues.apache.org/jira/browse/HIVE-2752
> Project: Hive
> Issue Type: Bug
> Components: Indexing, Metastore, Query Processor
> Affects Versions: 0.9.0
> Reporter: Philip Tromans
> Assignee: Navis
> Priority: Minor
> Fix For: 0.13.0
>
> Attachments: HIVE-2752.1.patch.txt
>
> Original Estimate: 4h
> Remaining Estimate: 4h
>
> The following script:
> DROP TABLE IF EXISTS TestTable;
> CREATE TABLE TestTable (a INT);
> DROP INDEX IF EXISTS TestTableA_IDX ON TestTable;
> CREATE INDEX TestTableA_IDX ON TABLE TestTable (a) AS
> 'org.apache.hadoop.hive.ql.index.compact.CompactIndexHandler' WITH DEFERRED
> REBUILD;
> ALTER INDEX TestTableA_IDX ON TestTable REBUILD;
> results in the following exception:
> MetaException(message:index testtablea_idx doesn't exist)
> at
> org.apache.hadoop.hive.metastore.ObjectStore.alterIndex(ObjectStore.java:1880)
> at
> org.apache.hadoop.hive.metastore.HiveMetaStore$HMSHandler$30.run(HiveMetaStore.java:1930)
> at
> org.apache.hadoop.hive.metastore.HiveMetaStore$HMSHandler$30.run(HiveMetaStore.java:1927)
> at
> org.apache.hadoop.hive.metastore.HiveMetaStore$HMSHandler.executeWithRetry(HiveMetaStore.java:356)
> at
> org.apache.hadoop.hive.metastore.HiveMetaStore$HMSHandler.alter_index(HiveMetaStore.java:1927)
> at
> org.apache.hadoop.hive.metastore.HiveMetaStoreClient.alter_index(HiveMetaStoreClient.java:868)
> at org.apache.hadoop.hive.ql.metadata.Hive.alterIndex(Hive.java:398)
> at org.apache.hadoop.hive.ql.exec.DDLTask.alterIndex(DDLTask.java:902)
> at org.apache.hadoop.hive.ql.exec.DDLTask.execute(DDLTask.java:236)
> at org.apache.hadoop.hive.ql.exec.Task.executeTask(Task.java:134)
> at
> org.apache.hadoop.hive.ql.exec.TaskRunner.runSequential(TaskRunner.java:57)
> at org.apache.hadoop.hive.ql.Driver.launchTask(Driver.java:1332)
> at org.apache.hadoop.hive.ql.Driver.execute(Driver.java:1123)
> at org.apache.hadoop.hive.ql.Driver.run(Driver.java:931)
> at
> org.apache.hadoop.hive.cli.CliDriver.processLocalCmd(CliDriver.java:255)
> at org.apache.hadoop.hive.cli.CliDriver.processCmd(CliDriver.java:212)
> at org.apache.hadoop.hive.cli.CliDriver.processLine(CliDriver.java:403)
> at org.apache.hadoop.hive.cli.CliDriver.processLine(CliDriver.java:338)
> at
> org.apache.hadoop.hive.cli.CliDriver.processReader(CliDriver.java:436)
> at org.apache.hadoop.hive.cli.CliDriver.processFile(CliDriver.java:446)
> at org.apache.hadoop.hive.cli.CliDriver.run(CliDriver.java:642)
> at org.apache.hadoop.hive.cli.CliDriver.main(CliDriver.java:554)
> at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
> at
> sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
> at
> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
> at java.lang.reflect.Method.invoke(Method.java:597)
> at org.apache.hadoop.util.RunJar.main(RunJar.java:156)
> When you execute: "SHOW INDEXES ON TestTable;", you get:
> TestTableA_IDX testtable a
> default__testtable_testtablea_idx__ compact
> so it looks like things don't get lower cased when they go into the
> metastore, but they do when the rebuild op is trying to execute.
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