PostgreSQL is an enterprise class, open-source, object-relational database management system (ORDBMS) available for all major platforms including Linux, UNIX, Windows and OS X. Please mention your exact PostgreSQL version when asking questions.

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Migrate heroku database to Amazon RDS with minimum downtime

I have a heroku postgres database and want to migrate it to Amazon RDS to save cost. What's a way to do so with minimum downtime? Usually this involves replicating database in real time and then ...
1
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1answer
1k 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
44 views

PostgreSQL 9.x: a clustered index on column A is the same as creating a table ordered by A?

Reading the official PostgreSQL documentation for version 9.0 I read an interesting escamotage that performs better than CLUSTER for big tables: The CLUSTER command reorders the original table by ...
0
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2answers
29 views

How to rollback transaction if row changed?

I am using Postgres 9.3. When I update row in a table my flow looks like this: Fetch old row (ex. SELECT * FROM tbl WHERE id = 1) Validate new data in scope of old data (old row fetched in point 1) ...
0
votes
1answer
4 views

extract state changes from snapshot-based archive table

I have a table snapshot, storing snapshots every time an object stored in another live changed one of its attributes. I need to find all objects that changed a specific variable to a specific value in ...
1
vote
1answer
99 views

How to get back the PostgreSQL database to a specific poin in time?

I am running a batch script(10:40) in postgresql database which will insert values in differnt tables on postgresql till (11:00).Later i came to know that the script was executed mistakenly.Now how ...
0
votes
1answer
618 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 ...
-2
votes
1answer
22 views

Best way to query for a list and then run a query for each result in that list [on hold]

I am new to databases in general and particularly new to PostgreSQL (v 9.3). I often find myself in the situation that I first run a select statement which will return a list of users stored in an ...
1
vote
1answer
223 views

REST webservice as a Foreign Data Wrapper in postgresql

I know it's possible to embed data from a foreign resource in a postgresql database as a foreign table and have seen examples including redis, another postgres database, etc but I can't really find ...
0
votes
2answers
24 views

Write output from dynamic queries in PL/pgSQL to CSV file

PG_CMD="psql -d portal -U portal -c " PG_CMD_TP="psql -d portal -U portal -t -P format=unaligned -c " abc() { $PG_CMD " DO \$$ DECLARE srowdata record; ...
3
votes
2answers
140 views

Slow fulltext search due to wildly innacurate row estimates

Fulltext queries against this database (storing RT tickets) seem to be taking a very long time to execute. The attachments table (containing the fulltext data) is about 15GB. The database schema is ...
0
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0answers
11 views

Imported a new month of data, now getting Numeric data overflow error when running query

We have an ETL job that brings in monthly revenue, and I've never experienced any issues with the data in terms of not being able to return results. The ETL job succeeded, but when I run a query to ...
1
vote
1answer
70 views

How to put the results of a query into a variable?

I have written a Postgres anonymous block. In which I have written join query on multiple tables like: select a.portal.*, a.p_fb_config.*, a.p_gplus_config from a.portal left outer join ...
1
vote
1answer
530 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, ...
3
votes
1answer
50 views

How can I implement a sequence for each foreign key value?

In a PostgreSQL (9.3) database, I have a one-to-many relationship between Accounts and Customers, so within the Customers table, I have a globally-unique id for the primary key of each Customer, plus ...
2
votes
2answers
24 views

query to find all dblink()

Besides manually searching for all the dblink() used in triggers/functions/stored procedures is there a way to query for this information? Example: There is a dblink inside of a trigger, can I select ...
1
vote
0answers
17 views

Pass a URI as a pgAdmin parameter

I can connect to Heroku with psql passing a URI: $ psql postgres://user:password@ec2-54-243-xxx-xxx.compute-1.amazonaws.com:5432/d7xkxididkdi I want to do the same with pgAdmin: $ pgadmin3 -qc ...
0
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0answers
11 views

Postgres Join that allows for an empty table [migrated]

I have the following schema, and I'm having a lot of trouble joining these tables properly. I'm trying to get all folders that don't have a file updated in the last 10 mins in them. But I want to ...
0
votes
0answers
6 views

Schemas with the same name in a Redshift cluster?

Is it harmful in some way to have multiple schemas with the same name in a database cluster, specifically Redshift? I want to create multiple databases, and then create a schema "tables" or "data" or ...
0
votes
1answer
21 views

How compiled are prepared statements?

I found this explanation of how prepared statements are compiled, but I'm still unsure. What exactly is "compiled" in the context of a prepared statement? Is a C compiler executed to create a custom ...
0
votes
0answers
15 views

SQL social connections query

Given the following 2 tables: Profiles --------- id, name Connections ----------- id1, id2, status where status is (for the sake of the example) either 'pending', or 'active'. What I'm trying to ...
0
votes
1answer
12 views

Avoid PG::TRDeadlockDetected

I am using the below function in a bulk insert, usually the bulk insert has around 60 rows and each row will have the below function. But from time to time I get PG::TRDeadlockDetected: ERROR: ...
1
vote
0answers
39 views

Simple avg query on large table much slower in PostgreSQL than SQL Server

I have a database with three tables items, parameters and measurements in both servers and want to query the measuerment table. But the query is much slower in PostgeSQL (9.4) vs SQL Server (2012). ...
1
vote
0answers
21 views

Get inserted row count when master table isn't modified

I have a partitioned table where data resides only in the child tables. The master table has an insert trigger that will distribute inserted data into appropriate child tables. Now, I need to create ...
1
vote
2answers
26 views

Speed of WAL send/receive when replicating

1/ Description: I have a cluster include two machines Master: postgresql 9.3 run on Centos Slave : postgresql 9.3 run on Centos Master ----> Slave : relpica from Master to Slave by asynchronous ...
0
votes
0answers
6 views

Failover_command in pgpool is not working?

I have setup the pgpool with load balancing and failover mode. Following is my failover_command='/usr/local/etc/failover.sh %d %P %H %R' The following is the script: !/bin/bash -x FALLING_NODE=$1 ...
1
vote
1answer
94 views

How do I use pg_dump and pg_restore to move a large database to another machine?

I'm a bit unclear on how to use the pg_dump/pg_restore duo to move a large-ish database. Here is the command I use to dump the database (the host and username are taken from environmental variables): ...
-2
votes
1answer
29 views

How to use variable value inside copy function [on hold]

I want to send data to .csv file using COPY function in Postgres. But I am using anonymous block so my table name should be value of variable. COPY (SELECT cname.portal from user) To '/tmp/out.csv' ...
0
votes
1answer
14 views

Postgres Nested WHEN Aggregate Function

In PostgreSQL (version 9.4) I am trying to construct a query to determine in various tranches how many times various numbers appear in the data set between ranges. When I query group-ing by ...
1
vote
2answers
1k views

pgpool replication not allowing md5 authentication

I have installed both pgpool and postgresql via apt. In pgpool.conf, I have made the changes necessary to use replication mode, as well as my two postgresql databases (currently all running on the ...
0
votes
0answers
25 views

MSSQL - Creating backup of 1 day worth of data and then merge them to make a full database [on hold]

I am new to this forum let me know if there is any update to be made. Use-case: I would like to create a snapshot daily which would have 1 day worth of data for 7 days and then combine it with ...
1
vote
1answer
19 views

How do I debug an Idle Query?

I have a batch query that I'm running daily on my database. However, it seems to get stuck in idle state, and I'm having a lot of difficulty debugging what's going on. The query is an aggregation on ...
1
vote
1answer
19 views

Linking Products to Users Via Categories

I'm trying to match products to users where the users has the same set of categories as the product, here is the schema: User ——— user_id ... Users Categories ——— user_id category_id Products ...
1
vote
1answer
108 views

How to make pg_dump skip extension?

This is on 9.3 but I can remember simillar things happening since 7.x. So I create database and install plpgsql extension into it. Later on I create a pg_dump and before restoring it into databse I ...
0
votes
0answers
22 views

EXECUTE format not working [on hold]

DO \$$ DECLARE customer_list varchar[]; customer_schema varchar(100); portal_row a.portal%ROWTYPE; var1 varchar(100); temp varchar(100); ...
0
votes
0answers
14 views

PostgreSQL 9.3.5 database restore error : plpgsql already exists

I have a .net program to restore a PostgreSQL database backup. What it is doing is 1) Delete the existing database. 2) Create it again. 3) Initialize some variables/properties. 4) Restore the ...
0
votes
1answer
31 views

Setting PostgreSQL data_directory in postgresql.conf not working

I'm attempting to configure PostgreSQL 9.3 on a Centos 6.6 box to keep the configuration files (postgresql.conf, pg_hba.conf, pg_ident.conf) in a different directory than the data directory. According ...
0
votes
1answer
30 views

selecting rows from table under public schema where each row acts as a schema

in My DB,I have customer table in public schema.And then I have schema named after each customer.Each customer schema contains different tables like portals,plugin.... .When I want to select portals ...
1
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0answers
55 views

How to speed up query which is using <@> operator?

I am using earthdistance extension (along with cube extension). I have following query: SELECT "User"."id" ,"User"."displayName" ,"User"."firstName" ,"User"."lastName" ...
0
votes
1answer
21 views

dynamic postgres inside shell script not working

PG_CMD="psql -d portal -U portal -c " PG_CMD_TP="psql -d portal -U portal -t -P format=unaligned -c " abc() { $PG_CMD " DO \$$ BEGIN select * from customer; ...
1
vote
2answers
39 views

Return counts for multiple ranges in a single SELECT statement

I have a Postgres database table foo that, among other things, has a column for score that ranges from 0 - 10. I want a query to return the total number of scores, the number of scores between 0 and ...
1
vote
2answers
33 views

Index for numeric field is not used

I have PG server (9.0.4) installed on Debian x86. In one of my tables I use numeric(6,1): CREATE TABLE mytable(name text, numfield numeric(6,1)) Also index created for this field: CREATE INDEX ...
0
votes
1answer
187 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 ...
0
votes
1answer
16 views

Is it possible to backup my ubuntu postgresql database by copying the /var/lib/postgresql/9.1/main file and pasting it back in?

A developer working on my server has fiddled with some settings and knocked my postgresql database offline. I've been messing with it for an hour and am considering just reinstalling postgresql fresh ...
0
votes
0answers
12 views

Insert into a specific partition, create if not exists

So I have my master table: p_reports: id(pk), web_id, other(data) At the moment I create my partitions which inherits from p_reports by using: CREATE TABLE IF NOT EXISTS ...
0
votes
0answers
15 views

Umlauts in DBeaver

I have a postgres Database set to UTF-8. I am working with DBeaver 3.1.4, and it seems to use a different encoding than UTF-8 (I suppose Latin-1 or something), which leads to 1) wrong display in the ...
1
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0answers
32 views

How to modelling a union type in PostgreSQL

We have the generic idea of a rule with specific implementation details stored in their own table. We currently have the following schema: Rule * id * name * ruleAId * ruleBId * .... * ...
0
votes
1answer
6k views

Postgres requires commit or rollback after exception

Just trying to understand the thinking here... This bug explains that with other databases, you are allowed to run additional commands after a SQLException occurs. It was written in 2001 but has ...
0
votes
0answers
18 views

Sampling and matching samples with spatial conditions

The Problem I have two tables with start points of a route and possible end points of a route which need to be matched against each other. I also have a given distribution for the distance between ...
0
votes
0answers
30 views

Postgres Won't Start - incomplete startup packet

I have an issue that is preventing a Postgres server from starting. The server fell over after it ran out of disk space, how ever this has now been resolved although now Postgres will not start. It ...