questions about varlist and Query

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От John
Тема questions about varlist and Query
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Msg-id BAY105-DAV4C221463FCC3C6E30CBA5AC1C0@phx.gbl
обсуждение исходный текст
Ответ на suppress output for benchmarking  (uwcssa <uwcssa@gmail.com>)
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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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