Re: what is sublinks in query planner?

From: Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>
To: Sandeep Gupta <gupta(dot)sandeep(at)gmail(dot)com>
Cc: "pgsql-general(at)postgresql(dot)org" <pgsql-general(at)postgresql(dot)org>
Subject: Re: what is sublinks in query planner?
Date: 2014-03-28 19:56:18
Message-ID: 27942.1396036578@sss.pgh.pa.us
Views: Raw Message | Whole Thread | Download mbox | Resend email
Thread:
Lists: pgsql-general

Sandeep Gupta <gupta(dot)sandeep(at)gmail(dot)com> writes:
> I looked for description of sublinks in the code as well as online but
> failed to come with any information. Was wondering someone can provide a
> line or two of what sublinks are suppose to do?

They're sub-SELECTs used in expression contexts (ie, not directly in a
FROM list). The comments for the SubLink and SubPlan node types in
primnodes.h may help you.

regards, tom lane

In response to

Responses

Browse pgsql-general by date

  From Date Subject
Next Message Sandeep Gupta 2014-03-28 19:59:25 Re: what is sublinks in query planner?
Previous Message Sandeep Gupta 2014-03-28 19:46:28 what is sublinks in query planner?