PostgreSQL is a powerful, enterprise class, open source RDBMS. It has more than 15 years of active development and a proven architecture that has earned it a strong reputation for reliability and data integrity. It runs on all major operating systems, including Linux, UNIX and Windows. It prides ...

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2
votes
5answers
74 views

Make IN clause behave like AND clause

I've asked the same question on stackoverlow, but got no answer, so that's why I'm asking it here (I've read that simple sql questions should be asked at SO, but I have no choice). Suppose I have 3 ...
1
vote
1answer
2k views

Installing and configuring postgresql 9.3 on ubuntu 13.10 using puppet

I'm having some trouble getting postgresql[1] to install with puppet[2] on a blank ubuntu box. I need to install postgresql 9.3 on Ubuntu 13.10. Since postgresql 9.3 is apparently not in the official ...
2
votes
1answer
5k views

Postgres client copy (\copy) command doesn't have access to a temporary table?

I'm generating a list of SQL commands to export some data that I ultimately run using psql -f. The queries all get the same subset of data, so I thought I'd factor the qualifications out and put a ...
2
votes
1answer
45 views

How to optimise window queries in postgres

I have the following table with approximately 175k records: Column | Type | Modifiers ...
11
votes
5answers
3k views

How to efficiently copy millions of rows from one table to another in Postgresql?

I have two database tables. One contains hundreds of millions of records. Lets call that one history. The other one is calculated on daily basis and I want to copy all of its records into the history ...
0
votes
1answer
463 views

Configuring Postgres 9.2 streaming replication with Redhat Clustering Suite for High Availability

I'm in the process of configuring postgresql 9.2 streaming replication with Redhat Clustering Suite for high availability. I have 1 master and 1 hot standby configured to replicate the data from ...
0
votes
1answer
36 views

How to create a Postgres trigger to ensure field is non-updateable

I'm trying to create a Postgres trigger to ensure after a column's value has been set, it cannot be updated (basically make it readonly). So far I've come up with the following draft trigger. 1) ...
0
votes
1answer
13 views

Postgres-9.1 having more Idle connections

The connections were created 2 days before. Can I kill the process manually by using the below query? select pg_terminate_backend(procpid) from pg_stat_activity where datname = 'mydb' and procpid ...
0
votes
1answer
17 views

PostgreSQL SQL syntax - JOIN and substrings

I have a single table of hostnames and NFS exports, some but not all of which are related. Example entries: HOST VOLUME ----- ---------- host1 vol1 host1 vol2 host1 ...
1
vote
1answer
18 views

PGAdmin III Server Status Error: Could not read directory “pg_log” No such file or directory

Running PostgreSQL 9.3 on Ubuntu 14.04 and pgAdmin III 1.18.1 on Windows 7. I tried Tools->Server Status and I get an error: "Could not read directory "pg_log" No such file or directory" I ...
2
votes
2answers
68 views

Tuning Postgres for Single connection use? Or is postgres wrong tool?

Any rules of thumb for work_mem, maintenance_work_mem, shared_buffer, etc. for a database that DOESN'T anticipate concurrent connections and that is doing lots of aggregate functions? I'm a social ...
2
votes
1answer
421 views

MATCH FULL vs MATCH SIMPLE

I've noticed a MATCH SIMPLE or MATCH FULL option in phpPgAdmin, but I can't find a description in the docs. How do they function? The default is set to MATCH SIMPLE.
0
votes
1answer
14 views

How to access pg_settings from separate connection

I am trying to access the pg_settings table from a separate connection belonging to a legacy application. I know how to identify the connection's procid from pg_stat_activity, but I am unsure how to ...
5
votes
3answers
14k views

Granting access to all tables for a user

I'm a new to Postgres and trying to migrate our MySQL databases over. In MySQL I can grant SELECT, UPDATE, INSERT, DELETE privileges on a low privileged user and enable those grants to apply to all ...
1
vote
0answers
35 views

How to measure bandwidth requirements for MySQL, Postgres, …?

TLTR: how to configure MySQL/Postgres to get a fair measurement of the I/O requirments for analytical queries? Hello, for certain database and especially database hardware experiments for want to ...
1
vote
1answer
41 views

How to insert into view through GUI in pgAdmin?

I have some updateable views for inserting the data. The reason is not just "security layer", inserting into some 10 tables directly would be a pain without the view with INSTEAD OF trigger. In ...
0
votes
1answer
42 views

Implementing Permissions Database structure on a PHP site to restrict the Access in Multiple levels

I am working on a PHP site that shows the business of a Vehicle Showroom company in which we have 3 users as, Admin(Owner) = Here Admin Have all Access by default(View,Edit,Delete to all) Super ...
0
votes
1answer
572 views

PgPool 2 with HA Proxy

So, I'm looking to add high availability to a postgresql server. I've looked into some tutorials on the web but, haven't been able to find exactly what I'm looking for. E.g.: PostgreSQL ...
1
vote
1answer
9 views

Create user to monitor database activity on Postgres

Postgres 9.3 Debian 7 I want to create a monitor user called monitor that the only permission is to run queries to monitor all the database activity. I created the user and it can select from ...
1
vote
2answers
79 views

Creating a unique constraint on a PostGIS 'raster' type column

I am using the following command to add constraints to one of the raster image in PostGIS-2.1.3 (PostgreSQL-9.1.14). ALTER TABLE schema1.table1 ADD CONSTRAINT enforce_scalex_rast unique (rast); But ...
1
vote
2answers
57 views

Limiting read access in postgres to few rows

We have a requirement where we want to limit the maximum no. of rows that a select query can return when its done using a particular login. So basically we would like to append a limit clause to any ...
3
votes
5answers
92 views

Find all values not present for other values of other column

Let's suppose I have a table with integer columns a and b (each pair (a,b) is unique) and following data: a | b ------- 1 | 2 1 | 3 1 | 4 1 | 5 2 | 1 2 | 3 2 | 4 3 | 1 3 | 3 Now I need to ...
1
vote
1answer
28 views

Joining timestamped records with the most-recent-prior records from another timestamped table

Say I have 2 tables: Table: sales timestamp timestamp without time zone amount numeric Table: prices timestamp timestamp without time zone price numeric How can I get a ...
0
votes
1answer
15 views

Need some help with this query or some ideas for change it to better model

I've a dilemma in my application and I don't get how to solve it at DB level. The idea is that a user can be subscribed to one or more services but services are show depending on user type. This can ...
0
votes
1answer
111 views

Problems using “Excel PostgreSQL Import, Export & Convert Software”

I want to export data from Postgresql, and I tried many ways then find the tutorial of Excel PostgreSQL Import, Export & Convert Software on Youtube. I installed the software, but I could not ...
14
votes
4answers
12k views

Pattern matching with LIKE, SIMILAR TO or regular expressions in PostgreSQL

I had to write a simple query where I go looking for people's name that start with a B or a D : SELECT s.name FROM spelers s WHERE s.name LIKE 'B%' OR s.name LIKE 'D%' ORDER BY 1 I was wondering ...
1
vote
1answer
91 views

PostgreSQL 9.3 - Performance Issue: Counting table entries slower with jdbc postgres driver

I'm using PostgreSQL 9.3 and want to ask if it is possible to improve the performance of my queries based on the following database schema: CREATE TABLE "entities" ( "id" BIGSERIAL, "type" INT ...
0
votes
2answers
28 views

assign selected columns to a variable

Select sum(column_a) as a, sum(column_b) as b round(a / b) From table Group by column In the example above I am summing two column, and I would like to use those 2 results in calculating ...
0
votes
0answers
14 views

Which benchmark assess string pattern matching in a database?

I have a postgresql DB in which I do a lot of string matching ala : UPDATE table1 SET colum1 = TRUE WHERE colum2 LIKE '%teststring%'; colum2 is a whole html file As I said I do A LOT of this and ...
1
vote
4answers
125 views

Mass data upload from Excel - technology

I am a Developer seeking help in terms of DB technology for a specific requirement. I have done some research but can not conclude with list. Requirement: There will be a web application which will ...
3
votes
1answer
22 views

timeline 2 of the primary does not match recovery target timeline 1

I want to create a configuration with postgresql and pgpool to get height availability (HA). I want to do this: .-----. .--------. | | W | DB | | APP ...
2
votes
1answer
60 views

PL/pgSQL function or rCTE to detect depth of relations between two tables

I need to perform a PostgreSQL Function for checking the depth of relations. There is a circular binding from table a to b, back to another element in a and, in some cases back again to b. These ...
1
vote
3answers
123 views

Postgresql: datatype for email address

What would be the right datatype to store email addresses in PostgreSQL? I can use varchar (or even text), but I wonder if there is a more specific data type for emails.
2
votes
3answers
450 views

How do I ORDER BY typical software release versions like X.Y.Z?

Given a "SoftwareReleases" table: | id | version | | 1 | 0.9 | | 2 | 1.0 | | 3 | 0.9.1 | | 4 | 1.1 | | 5 | 0.9.9 | | 6 | 0.9.10 | How do I produce this output? | id | ...
3
votes
4answers
3k views

Passing arguments to psql

I'm running a plpgsql script in Postgres 8.3 - I would like to pass arguments to this script via psql. I'm currently executing the script like: psql -d database -u user -f update_file.sql I came ...
2
votes
1answer
164 views

Could not open file “pg_clog/0000”: No such file or directory

My local PostgreSql 9.2 database won't start anymore this morning. I am on Windows 7. Yesterday, I performed a Windows Update before going to bed. I have checked the log and found: 2014-05-28 ...
5
votes
2answers
8k views

PostgreSQL 9.1 Hot Backup Error: the database system is starting up

I have been working on a hot backup for Postgres 9.1 for awhile and have run into a consistent issue. After restarting Postgres on the slave server the pgstartup log file and the daily log file under ...
0
votes
1answer
161 views

Postgres DB - Commit xlog files after server crash

After a server crash, it would seem that all transactions going back a number of months are not showing up in the live Postgres DB. Investigation has found all xlog files that does contain the data ...
2
votes
1answer
75 views

Searching a big table for a few results without scanning the whole table

I need to search a very big PostgreSQL table (500+M rows), I want to limit the returned search results, but using the "limit" keyword cant prevent the search over the whole set of data(is it correct?) ...
2
votes
2answers
148 views

SELECT UNION from two views of the same table

(Sorry the the vague title, if anyone want to re-edit, be my guest!) I have these tables and views for a factory inventory module : +----------------------------+ +--------------------------+ | ...
1
vote
1answer
43 views

Update different columns on different clauses

I have a database table in Postgres 9.3 with the following layout: id SERIAL, col1 INT, col2 INT Whenever a new row is inserted, I will have to update ALL rows col1 and/or col2 in different cases ...
0
votes
1answer
50 views

Why does 'plpgsql' not appear in the pg_extension table?

I have two Postgres 9.1 installations. One works properly, the other does not. On the working installation: dc=# select * from pg_extension; extname | extowner | extnamespace | extrelocatable | ...
0
votes
1answer
362 views

pgpool2 setup on master-slave replication using postgreql 9.1

I have already setup 2 ubuntu server 12.04 LTS on my local machine using virtual box and is using the master-slave replication (postgresql 9.1). 192.168.0.109 = master 192.168.0.110 = slave my ...
0
votes
1answer
352 views

How to add FK on a column of composite type in PostgreSQL?

I have a table which contains a composite type and I am trying to connect a column of it to another table's PK. CREATE TABLE aaa (col1 SERIAL PRIMARY KEY); CREATE TYPE bbb AS (col2 INTEGER); CREATE ...
6
votes
2answers
72 views

How can I fake inet_client_addr() for unit tests in PostgreSQL?

I have a simple stored procedure whose return value depends on the value of inet_client_addr(). How can I override inet_client_addr() for the purpose of unit tests when testing my stored procedure? ...
2
votes
1answer
32 views

How to determine if postgres database contains GiST indexes and what type?

Is there a way to easily check if a PostgreSQL database has any GiST indexes and of what type they are?
0
votes
1answer
59 views

mongodb on-premise: will it work?

We are planning to package MongoDB-PostgreSQL hybrid solution in our application that will be deployed on customer site on-premise. It will be packaged as a software virtual appliance. Our reason for ...
4
votes
1answer
58 views

Investigating rollbacks in Postgres

A Postgres monitoring script, check_postgres.pl, is warning me that a large number of rollbacks are occurring on a database server. How can I investigate what queries are being rolled back? I have ...
0
votes
1answer
458 views

multi-master to single-slave replication at table level with PostgreSQL or MySQL

Here is my scenario Master1 hosting DB1 Master2 hosting DB2 ... MasterN hosting DBN replicate to: Slave1 hosting DB1,DB2... DBN I've read similar questions and they recommend to start different ...
1
vote
1answer
330 views

Tree structure hierarchical query sorting

I have the following structure of table. CREATE TABLE table1 ( serial_num integer NOT NULL, parent_num integer, parent_key text, key_ary_num integer[], level integer, rank integer, ...