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https://issues.apache.org/jira/browse/HIVE-11628?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14710019#comment-14710019
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Ashutosh Chauhan commented on HIVE-11628:
-----------------------------------------
I think HIVE-11123 has a better fix for this.
> DB type detection code is failing on Oracle 12
> ----------------------------------------------
>
> Key: HIVE-11628
> URL: https://issues.apache.org/jira/browse/HIVE-11628
> Project: Hive
> Issue Type: Bug
> Components: Metastore
> Environment: Oracle 12
> Reporter: Deepesh Khandelwal
> Assignee: Deepesh Khandelwal
> Fix For: 2.0.0
>
> Attachments: HIVE-11628.patch
>
>
> DB type detection code is failing when using Oracle 12 as backing store.
> When determining qualification for direct SQL, in the logs following message
> is seen:
> {noformat}
> 2015-08-14 01:15:16,020 INFO [pool-6-thread-109]:
> metastore.MetaStoreDirectSql (MetaStoreDirectSql.java:<init>(131)) - Using
> direct SQL, underlying DB is OTHER
> {noformat}
> Currently in org/apache/hadoop/hive/metastore/MetaStoreDirectSql, there is a
> code snippet:
> {code}
> private DB determineDbType() {
> DB dbType = DB.OTHER;
> if (runDbCheck("SET @@session.sql_mode=ANSI_QUOTES", "MySql")) {
> dbType = DB.MYSQL;
> } else if (runDbCheck("SELECT version from v$instance", "Oracle")) {
> dbType = DB.ORACLE;
> } else if (runDbCheck("SELECT @@version", "MSSQL")) {
> dbType = DB.MSSQL;
> } else {
> // TODO: maybe we should use getProductName to identify all the DBs
> String productName = getProductName();
> if (productName != null && productName.toLowerCase().contains("derby"))
> {
> dbType = DB.DERBY;
> }
> }
> return dbType;
> }
> {code}
> The code relies on access to v$instance in order to identify the backend DB
> as Oracle, but this can fail if users are not granted select privileges on v$
> tables. An alternate way is specified on [Oracle Database Reference
> pages|http://docs.oracle.com/cd/B19306_01/server.102/b14237/statviews_4224.htm]
> works.
> I will attach a potential patch that should work.
> Without the patch the workaround here would be to grant select privileges on
> v$ tables.
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