[jira] [Updated] (HIVE-12184) DESCRIBE of fully qualified table fails when db and table name match and non-default database is in use

["Naveen Gangam (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/HIVE-12184?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Naveen Gangam updated HIVE-12184:
---------------------------------
    Attachment: HIVE-12184.4.patch

I am attaching a patch that proposes a change to the hive grammar for "DESCRIBE TABLE".
The following is the new syntax
DESCRIBE TABLE [DB.]TABLE [ COLUMN]

where DB is the database identifier (DOT ends the name of the database)
TABLE is table identifier
COLUMN is either
  column name
  column.$elem$ // references the list for list datatypes
  column.$elem$.<listMember> // references the member of the list
  column.$key$ // references the key for map datatypes
  column.$value$ // references the value for the map data types.

Please review the change and let me know. 

> DESCRIBE of fully qualified table fails when db and table name match and non-default database is in use
> -------------------------------------------------------------------------------------------------------
>
>                 Key: HIVE-12184
>                 URL: https://issues.apache.org/jira/browse/HIVE-12184
>             Project: Hive
>          Issue Type: Bug
>          Components: SQL
>    Affects Versions: 1.2.1
>            Reporter: Lenni Kuff
>            Assignee: Naveen Gangam
>         Attachments: HIVE-12184.2.patch, HIVE-12184.3.patch, HIVE-12184.4.patch, HIVE-12184.patch
>
>
> DESCRIBE of fully qualified table fails when db and table name match and non-default database is in use.
> Repro:
> {code}
> : jdbc:hive2://localhost:10000/default> create database foo;
> No rows affected (0.116 seconds)
> 0: jdbc:hive2://localhost:10000/default> create table foo.foo(i int);
> 0: jdbc:hive2://localhost:10000/default> describe foo.foo;
> +-----------+------------+----------+--+
> | col_name  | data_type  | comment  |
> +-----------+------------+----------+--+
> | i         | int        |          |
> +-----------+------------+----------+--+
> 1 row selected (0.049 seconds)
> 0: jdbc:hive2://localhost:10000/default> use foo;
> 0: jdbc:hive2://localhost:10000/default> describe foo.foo;
> Error: Error while processing statement: FAILED: Execution Error, return code 1 from org.apache.hadoop.hive.ql.exec.DDLTask. Error in getting fields from serde.Invalid Field foo (state=08S01,code=1)
> {code}



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