Re: execute table query in backend

Thank you for you suggestion.
I actually took a look at SPI_ functions before. However, I believe using
this will bring quite an overhead.
I am trying to modify the Sequence scan node such that: each time the scan
returns a tuple,
we'll take some information from this tuple. And finally issue another scan
operation on a different table based on these information

On Thu, Mar 6, 2014 at 12:36 AM, Amit Langote <amitlangote09(at)gmail(dot)com>wrote:

> On Tue, Mar 4, 2014 at 12:38 AM, Anh Pham <atpham(dot)wpi(at)gmail(dot)com> wrote:
> > Hi,
> > I am trying to extend the server backend by writing a new module.
> > Basically, it tries to retrieve tuples from a specific table using some
> > predefined qualifications (equivalent to "SELECT FROM WHERE" client sql
> > statement ).
> > Is there any quick or efficient way to do this?
>
>
> Assuming you're trying to write a server extension (and NOT a client
> application), this is where you can start:
>
> http://www.postgresql.org/docs/9.3/static/server-programming.html
>
> Specifically, an interface called "server programming interface"
> (chapter 44 on the above page) can be used to issue SQLs from a server
> extension module. Read more about it here (documentation also includes
> few examples to get started with):
>
> http://www.postgresql.org/docs/9.3/static/spi.html
>
> --
> Amit
>

--
Anh T Pham
Computer Science
Worcester Polytechnic Institute