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From "Liu, Ming (Ming)" <>
Subject 答复: 答复: 答复: add a comment to a table
Date Fri, 01 Apr 2016 14:57:13 GMT
Hi, Gunnar,

Yes, extend showddl will be a very good way to retrieve comments. QiFan is proposing to write
a UDF, Oracle seems to provide a system table with comments, and user have to write a query
to search in that system table.
Showddl will be a nice way, so we can add that capability as well.
I will update the jira and record this.

We can discuss more about the implementation and design in the JIRA. It is TRAFODION-1915.


发件人: Gunnar Tapper []
发送时间: 2016年4月1日 21:58
主题: Re: 答复: 答复: add a comment to a table

Can you do the columns too while you're at it? Being able to embed documentation is already
a good thing. For example, we could document the repository this way.

Also, do you plan to extend showddl to show the comments? Or, some other means?



On Fri, Apr 1, 2016 at 7:02 AM, Liu, Ming (Ming) <<>>
Very good plan QiFan.
Allow me file a JIRA then.

Compatibility will be important.


发件人: Qifan Chen [<>]
发送时间: 2016年4月1日 18:31
主题: Re: 答复: add a comment to a table

The implementation probably will be involving the following:

  1.  add a new type for column TEXT_TYPE in meta-table TRAFODION."_MD_".TEXT, say COMMENT_TYPE;
  2.  allow COMMENT ON syntax in the parser;
  3.  convert the content of COMMENT ON stmt into insertion/update of a row(s) in the TEXT
meta-data table for the SQL object in question;
  4.  write a UDF to show the comment easily for a SQL object, by hiding the join of the meta-data
TEXT and OBJECTS table.
The task may be a little bit involving :-).

Thanks  --Qifan

On Fri, Apr 1, 2016 at 1:30 AM, Liu, Ming (Ming) <<>>
Shall we file a JIRA to track this requirement?


发件人: Suresh Subbiah [<>]
发送时间: 2016年4月1日 11:54
主题: Re: add a comment to a table


I do not think Trafodion currently supports Oracle's COMMENT ON syntax

It will be a relatively simple feature to add but we do not have it today as far as I know.

Thank you

On Thu, Mar 31, 2016 at 9:56 PM,<>
Hi , all,

        I want to add a comment to a table,like the use of oracle" comment on table tablename
is annotate", How to use jdbc way to implement it?


Regards, --Qifan


If you think you can you can, if you think you can't you're right.
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