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https://issues.apache.org/jira/browse/SPARK-28696?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16905642#comment-16905642
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Dongjoon Hyun edited comment on SPARK-28696 at 8/12/19 10:30 PM:
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Oops. Wait a minute. We should allow this in Apache Spark 3.0 because of the 
feature parity with PostgreSQL (SPARK-27764).
I'd like to close this issue as `Won't Do` and marked as superseded by 
SPARK-27764 .
How do you think about that, [~cloud_fan], [~srowen], [~smilegator]?

{code}
postgres=# CREATE DATABASE _;
CREATE DATABASE

postgres=# \l
                                 List of databases
   Name    |  Owner   | Encoding |  Collate   |   Ctype    |   Access privileges
-----------+----------+----------+------------+------------+-----------------------
 _         | postgres | UTF8     | en_US.utf8 | en_US.utf8 |
...
{code}


was (Author: dongjoon):
Oops. Wait a minute. We should allow this in Apache Spark 3.0 because of the 
feature parity with PostgreSQL (SPARK-27764).
I'd like to close this issue as `Won't Do` and marked as superseded by 
SPARK-27764 .
How do you think about that, [~cloud_fan], [~srowen], [~smilegator]?

> create database _; allowing in Spark but Hive throws Parse Exception
> --------------------------------------------------------------------
>
>                 Key: SPARK-28696
>                 URL: https://issues.apache.org/jira/browse/SPARK-28696
>             Project: Spark
>          Issue Type: Bug
>          Components: SQL
>    Affects Versions: 3.0.0
>            Reporter: ABHISHEK KUMAR GUPTA
>            Priority: Minor
>
> In Spark
> spark-sql> create database _;
> Time taken: 0.062 seconds
> spark-sql> show databases;
> _
> adap
> adaptive
> adaptive_tc8
> In Hive
> 0: jdbc:hive2://10.18.98.147:21066/> create database _;
> Error: Error while compiling statement: FAILED: ParseException line 1:16 
> cannot recognize input near '_--0' '<EOF>' '<EOF>' in create database 
> statement (state=42000,code=40000)



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