| From: | Evgen Potemkin <eugen(dot)potemkin(at)gmail(dot)com> |
|---|---|
| To: | pgsql-hackers(at)postgresql(dot)org |
| Subject: | SQL99 Hierarchical queries |
| Date: | 2005-02-24 10:02:52 |
| Message-ID: | 44458e32050224020236ac358f@mail.gmail.com |
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| Lists: | pgsql-hackers |
Hi hackers!
I have done initial implementation of SQL99 WITH clause (attached).
It's now only for v7.3.4 and haven't a lot of checks and restrictions.
It can execute only simple WITH queries like
WITH tree AS (SELECT id,pnt,name,1::int AS level FROM t WHERE id=0
UNION SELECT t.id,t.pnt,t.name,tree.level+1 FROM t JOIN tree ON
tree.id=t.pnt ) SELECT * FROM tree;
It would be great if someone with knowledge of Pg internals can make a
kind of code review and make some advices how to better implement all
this.
Regards, Evgen.
| Attachment | Content-Type | Size |
|---|---|---|
| with-Pg7.3.4-0.0.zip | application/zip | 18.9 KB |
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