[HIVE-24557] Misalignment in matching db name from Hive and Webhcat

• Type: Bug
• Status: Open
• Priority: Minor
• Resolution: Unresolved
• Affects Version/s: 2.3.6
• Component/s: WebHCat
• Assignee: Unassigned
• Reporter: Davide Vergari
• Created: 22/Dec/20 08:27
• Updated: 22/Dec/20 08:44

Description

I found a small misalignment on how Hive and WebHCat parse database name starting with numbers.

If you execute:

hive> create database 2020db;
OK
Time taken: 0.44 seconds
hive>

it works, but if you do the same on webhcatalog it doesn't:

curl -i -s -X PUT -HContent-type:application/json -d '{"comment": "Test", "location": "hdfs://singlenode.localdomain:8020/apps/hive/warehouse/2020db"}' 'http://singlenode.localdomain:50111/templeton/v1/ddl/database/2020db?user.name=hdfs'
HTTP/1.1 400 Bad Request
Set-Cookie: hadoop.auth="u=hdfs&p=hdfs&t=simple&e=1608581595777&s=JzsCUqvyyAYHykAHdteybh1tI4jFLLVVJC5D9FaUu0A="; Path=/; HttpOnly
Content-Type: application/json
Transfer-Encoding: chunked
Server: Jetty(7.6.0.v20120127)
{"error":"Invalid DDL identifier :db"}

 

I suggest to harmonize the behavior, maybe applying a patch like the following one:

 

— a/hcatalog/webhcat/svr/src/main/java/org/apache/hive/hcatalog/templeton/Server.java
+++ b/hcatalog/webhcat/svr/src/main/java/org/apache/hive/hcatalog/templeton/Server.java
@@ -1068,7 +1068,7 @@ public void verifyParam(List<String> param, String name)
}
}

- public static final Pattern DDL_ID = Pattern.compile("[a-zA-Z]\\w*");
+ public static final Pattern DDL_ID = Pattern.compile("[a-zA-Z0-9]\\w*");