This tag is specifically for PostgreSQL version 9.1
1
vote
2answers
50 views
Group Database Entries by time difference
I have a large postgreSQL database with log data. All this data has timestamps and I want to group consecutive rows where the difference between the timestamps is less then 1500 miliseconds for ...
0
votes
1answer
36 views
Storing no of players the last seven days in an online game
I want to plot the number of players, in the last seven days, of an MMORPG which haves 50~ servers. The system fetches the number of players in each server every 15 minutes and I'm not really sure how ...
0
votes
1answer
22 views
Cannot create PostgreSQL user
I'm using PostrgreSQL 9.1.9 on Ubuntu 13.04.
Using the following StackOverflow question, I tried to create a user/role in postgressql:
...
1
vote
0answers
23 views
Failover - automatic switching between servers in Postgresql 9.1
I'm pretty new to Postgresql 9.1 and failover replication. We have a simple master-slave setup, for failover replication, which our application (client) is connected to. On a failure of the master, ...
1
vote
1answer
44 views
PostgreSQL: Cannot change directory to /root
I am trying to copy a table planet_osm_polygon from one database osm to another test. I su postgres and performed the pg_dump.
Problem: However I'm getting the error could not change directory to ...
0
votes
1answer
42 views
PostgreSQL, How to keep only one schema?
I don't want some users be available to create schemas, and only use the public schema.
I'd like to remove the permission of creating schemas, but I can't found anything on PotsgreSQL 9.1 ...
0
votes
1answer
63 views
How to insert binary data into a PostgreSQL BYTEA column using libpqxx?
I'm a newbie at SQL, and even greener when it comes to using the PostgreSQL C++ API libpqxx.
What I'd like to do is insert some binary data into a BYTEA column, but I find the Doxygen output is ...
1
vote
1answer
39 views
Pass a table array as a parameter to an upsert function in postgresql
i have an UPSERT function which works well but i update and insert records in batches, can this function be modified so that i just pass all the records to this function as an array then it will ...
1
vote
2answers
41 views
How do I list all schemas in PostgreSQL?
When using PostgreSQL v9.1, how do I list all of the schemas using SQL?
I was expecting something along the lines of:
SELECT something FROM pg_blah;
3
votes
3answers
118 views
Optimizing queries on a range of timestamps (two columns)
I use postgresql-9.1 with ubuntu 12.04.
I need to select records inside a range of time: my table time_limits has two timestamp fields and one property integer. Indeed there are other info columns ...
0
votes
1answer
29 views
Postgres 9.1 wait events
Is there anything in Postgresql 9.1 similar to wait events dynamic views of oracle?
I need to find queries which are waiting for a long time, and the events they are blocked on.
1
vote
0answers
31 views
Write performance of Postgresql 9.1 with read-only slave
I have a Postgresql 9.1 database that is being hosted by Heroku. It currently has a read-only "follower". I need to truncate several large tables (over 100GB) of data and reloads them. Is the ...
0
votes
0answers
41 views
How I can copy from local file to remote DB in PostgreSQL?
I am a novice in psql and need some help.
How can I load a local CSV to a remote DB?
I am using the following command
\COPY test(user_id, product_id, value)
FROM '/Users/testuser/test.tsv' ...
0
votes
1answer
35 views
Set field values to newly imported rows in PostgreSQL table with existing data
I have a PostgreSQL table with existing data, and needs to import all the rows in a CSV file into that table. I am using pgadmin3's Import tool to do the import.
Question: For the newly imported ...
2
votes
1answer
71 views
Limiting number of results in a Partition using OVER(PARTITION BY)
In the following query, why is it that we have to limit the results returned from each Partition by using the clause WHERE foo.row_num < 3 outside of the subquery foo but not from within the ...
