From: | "John" <xiaoqianjiang(at)hotmail(dot)com> |
---|---|
To: | "John" <xiaoqianjiang(at)hotmail(dot)com>, "PostgreSQL-development" <pgsql-hackers(at)postgresql(dot)org> |
Subject: | Questions about varlist and Query |
Date: | 2006-01-20 03:55:17 |
Message-ID: | BAY105-DAV129584927EF02DEA343395AC1F0@phx.gbl |
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Lists: | pgsql-hackers |
Fellow hacker,
I am new comer to postgres development community. Currently, I am
implementing tightly coupled machine classifiers within postgres. The
grammer looks like Train Parameter_list (class1,class2,class3...). I have
two major problems right now.
1. Train is a statement and it is suppose to return some parameters in the
form of a query. (To be used by a classifier later.) How can I return a
Query with self specified column name and data vectors?
2. class1, class2 are all supposed to be relations/query result. But what is
a proper container to hold them. I found var_list to be a good candidate as
it can contain unconstrained number of var_values. But var_values are of
constant types. Can I just add query as a constant? Anyone had this kind of
implementing experience?
Thanks,
John
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