CONTENT_TABLE id | author | timestamp | title | description ----+-----------------+-----------+----------------+---------------------- (0 rows) SEARCH_TABLE id | content_type_id | object_id | tsvector_title | tsvector_description ----+-----------------+-----------+----------------+---------------------- (0 rows) I have to fire a tri...
I have a view table which is a union of two separate tables (say Table _A and Table _B). I need to be able to update a row in the view table, and it seems the way to do this was through a 'view rule'. All entries in the view table have separate id's, so an id that exists in table _A won't exist in table _B. I created the following rul...
Most of my experience with Django thus far has been with MySQL and mysqldb. For a new app I'm writing, I'm dipping my toe in the PostgreSQL water, now that I have seen the light. While writing a data import script, I stumbled upon an issue with the default autocommit behavior. I would guess there are other "gotchas" that might crop up...
Does anybody have/know any amazon EC2 AMI that has PostgreSQL/PostGIS/GDAL/Proj/Geos installed? ...
I have been trying to create a small e-commerce web based application using MS Dot Net framework. The application will let the user allow to store the image of their product that they want to sell or purchase, then they will have the option to upload the image of a particular product and compare that image with the similar images in the ...
Do the following scheme for my database: create sequence data_sequence; create table data_table { id integer primary key; field varchar(100); }; create view data_view as select id, field from data_table; create function data_insert(_new data_view) returns data_view as $$declare _id integer; _result data_view%rowtype; ...
Hi I don't know the correct words for what I'm trying to find out about and as such having a hard time googling. I want to know whether its possible with databases (technology independent but would be interested to hear whether its possible with Oracle, MySQL and Postgres) to point to specific rows instead of executing my query again. ...
I'm writing a web based front end to a database (PHP/Postgresql) in which I need to store various dates/times. The times are meant to be always be entered on the client side in the local time, and displayed in the local time too. For storage purposes, I store all dates/times as integers (UNIX timestamps) and normalised to UTC. One partic...
I am trying to move to heroku which uses PostgreSQL 8.4 which has a citext column type which is nice since the app was written for MySQL. Is there any way to use :citext with rails (so that if the migrations are run on MySQL the citext would just use string/text? I found this ticket, but it seems like it isn't going to be a part of rai...
I'm trying to optimize the following query, but it's not clear to me what index or indexes would be best. I'm storing tiles in a two-dimensional plane and querying for rectangular regions of that plane. The table has, for the purposes of this question, the following columns: id: a primary key integer world_id: an integer foreign key wh...
I have a table whose columns are varchar(50) and a float. I need to (very quickly) look get the float associated with a given string. Even with indexing, this is rather slow. I know, however, that each string is associated with an integer, which I know at the time of lookup, so that each string maps to a unique integer, but each integer...
I have postgresql (in perlu) function getTravelTime(integer, timestamp), which tries to select data for specified ID and timestamp. If there are no data or if data is old, it downloads them from external server (downloading time ~300ms). Multiple process use this database and this function. There is an error when two process do not fin...
Is there an easy way to see the actual SQL generated by a rails migration? I have a situation where a migration to change a column type worked on my local development machine by partially failed on the production server. My postgreSQL versions are different between local and production (7 on production, 8 on local) so I'm hoping by lo...
I'm working on a timesheet system (thrilling, I know) and am having difficulty using ActiveRecord to total the time spent working on particular projects on each day. I have a TimeBooking model: t.references :assignment, :null => false # (Combination of employee and project) t.date :date, :null => false t.integer :durat...
I have a tree structure in an sql table like so: CREATE TABLE containers ( container_id serial NOT NULL PRIMARY KEY, parent integer REFERENCES containers (container_id)) Now i want to define an ordering between nodes with the same parent. I Have thought of adding a node_index column, to ORDER BY, but that seem suboptimal, since that...
Here is my plan, and goals: Overall Goals: Security with a certain amount of simplicity & database-to-database transferrability, 'cause I'm no expert and could mess it up and I don't want to have to ask a lot of users to reset their passwords. Easy to wipe the passwords for publishing a "wiped" databased of test data. (e.g. I'd like t...
When I try to do the select statement, I always get the following error: ERROR: more than one row returned by a subquery used as an expression Only if there's only one result, it works. Why and how to fix? SELECT name from person p where id = ( select prs from leader where age(leader.lastcourse) > '1 year'); ...
Hi everybody, Here it's my problem I've a list of the following measure : src1 dst2 24th december 2009 src1 dst3 22th december 2009 src1 dst2 18th december 2009 I would like to have just the latest measures with a sql request -> 2 first lines in my case because the pairs(src and dst) aren't the same. I try to use DISTIN...
Hi, I've another question I wish to sort a list of IP address. Are there any functions in Postgresql to use with the order by like INET_ATON in MySql ? My current IP is on string format. Thx. Narglix ...
I need to hash some passwords with salt on postgresql, and I haven't been able to find any relevant documentation on how to get that done. So how can I hash passwords (with some salts) in postgresql? ...