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From Jacques Nadeau <jacq...@apache.org>
Subject Re: Implement a http service data source plugin
Date Mon, 25 May 2015 19:26:15 GMT
What about something like:

use http;
select * from `/my/rest/endpoint` where $q = 'avi' and $p = 2

Then in the storage plugin, we treat all $[name] values as virtual columns
that translate into query parameters?

On Mon, May 25, 2015 at 6:32 AM, kevin <kevinlynx@gmail.com> wrote:

> Hi,
>    I'm working on implementing a new data source plugin (StoragePlugin),
> to query data from a http service which response json data. At right now, i
> can query like this:
>    select * from http.`q=avi&p=2` where count > 100
>    As you can see, i pass the http service query string by the table name
> `q=avi&p=2`, and which means the query string is STATIC. But in the real
> world a dynamic query string based on other query result is more useful.
> (Am i right ?)
>    If i want to support dynamic query string, does that mean i must
> implement StoragePluginOptimizerRule ? (which mongo storage plugin
> implemented, to transform query to mongodb query)
>    Say how about my query like this:
>    select * from http.dummy where reservsed_q='q=avi&p=2' and count > 100
>    I make a `reserved_q` to store the http query, and this string can be
> dynamic. And in my StoragePluginOptimizerRule, i must get `reserved_q`
> value, and consume the expression `reserved_q`.
>    So my question is, is this a good way (or suggest way) to do ? And can
> you guys give me some code hints to implement this, since
> StoragePluginOptimizerRule is a bit complicated to understand ?
> Thanks.

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