fastes way to retrieve segmented without using loop

From: Tom Smith <tomsmith1989sk(at)gmail(dot)com>
To: pgsql-general(at)postgresql(dot)org
Subject: fastes way to retrieve segmented without using loop
Date: 2015-08-23 21:05:55
Message-ID: CAKwSVFHtiS8oSjTJGvswX-VTakeZAQd5DJYkkktorCFCAuwYUg@mail.gmail.com
Views: Raw Message | Whole Thread | Download mbox | Resend email
Thread:
Lists: pgsql-general

Hello:

I have a time series table,
using below sql, loop (psque code), I can get one row for each hour

for( H=1: H< 99999; H++){
select * from table where t >= H and t < H+1 limit 1
}

t (time column) is indexed).

Is there a better way to use a issue a SINGLE SQL
with an array of time start/end pair
so it will be executed once to send back result, which would be much faster
than issuing sql again and again (even with prepared statement and using
sql function).

Thanks in Advance

Responses

Browse pgsql-general by date

  From Date Subject
Next Message Melvin Davidson 2015-08-23 21:38:44 Re: fastes way to retrieve segmented without using loop
Previous Message Igor Sosa Mayor 2015-08-23 20:15:30 Re: Problem with pl/python procedure connecting to the internet