From: | "Mark" <bbsjteapot(at)msn(dot)com> |
---|---|
To: | pgsql-hackers(at)postgresql(dot)org |
Subject: | working on support triggers on columns |
Date: | 2004-06-28 13:34:05 |
Message-ID: | h7VDc.85$fYa.30@news04.bloor.is.net.cable.rogers.com |
Views: | Raw Message | Whole Thread | Download mbox | Resend email |
Thread: | |
Lists: | pgsql-hackers |
(sorry I have to post it again in plain text)
I'm currently working on a master student research project support
triggers on columns that is supervised by a professor from my university
(Ottawa U). I have contacted Neil Conway whose name is with this item on
the TODO list. It happened that he actually lives very close to me(Queen's U
in Kingston). He has agreed that I work on this.
Please take a look of my design (Some of the ideas are from Neil)
- change gram.y for CREATE TRIGGER to support the optional column list for
this feature,
- change CreateTrigStmt, trigger, trigdesc node to add support for an
optional List of columns; change the various Node
support functions (equalfuncs.c, copyfuncs.c, etc.)
- change InsertTrigger, (Copy+Free+ equal)TriggerDesc, Relationbuild
function to add support an optional List of columns.
- change the pg_trigger system catalog to support the new column .
- change CreateTrigger() to perform some semantic analysis on the list of
columns (ensure no column names are duplicated,
ensure each name references an extent and non-dropped column, and so
forth)
- when deciding which triggers to invoke (executePlan() in execMain.c), add
logic to compare the list of columns in the
to-be-executed command with the list of columns in any applicable columns,
and only fire a trigger of the column lists
that are appropriately compatible
-investigate the interaction between the column list and rules
I have spent the past four months on this and I have finished the YYpaser,
Catalog, trigger creation and some other support functions, I am working on
trigger execution right now. I expect the project will be completed by the
end of July.
I would like to know your comments on my design and the procedure of getting
my work accepted.
Thanks
Mark Wu
From | Date | Subject | |
---|---|---|---|
Next Message | Tom Lane | 2004-06-28 13:59:25 | Re: Tablespace permissions issue |
Previous Message | isidore assi | 2004-06-28 12:05:57 | demande d'aide |