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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2answers
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Insert values from a record variable into a table

I am developing a user-defined function that takes two arguments: create or replace function gesio( events_table_in regclass, events_table_out regclass) returns void as $$ ... $$ ...
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0answers
738 views

PgPool is pushing Postgres to 100% cpu usage

I think I've followed the configuration for pgpool correctly, but he's pushing my postgres machines to 100% cpu usage unnecessarily. I have one pgpool machine that works just fine, no overload at all, ...
2
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1answer
1k views

Postgres: “Pivot” unioned table based on one column

I have a query that does this sort of thing: (SELECT rel_id, timestmap, y FROM table_1 AS full_ WHERE full_.timestamp BETWEEN %s AND %s ORDER BY full_.timestamp) UNION ALL (SELECT rel_id, ...
1
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1answer
869 views

How to do a minor upgrade postgresql 9.3.0 windows to 9.3.1?

What is the recommended way to perform an upgrade from PostgreSQL 9.3.0 to 9.3.1 (minor upgrade) using the Enterprise DB built windows installer? Should I uninstall first or just install over the ...
0
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1answer
116 views

Insert a group of consistent item with foreign key but colliding with existing items

Is there a way to insert a group of items that are dependent but consistent between them with unique primary keys and foreign keys but that are colliding with items in database. For example, given a ...
3
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0answers
334 views

PostgreSQL 9.2 - Partitioning: Constraint Exclusion on SELECT not kicking in [closed]

My partitioned table SELECT queries include all partitioned tables even though checks are in place and constraint_exclusion = on. The insert trigger works fine and new rows are inserted into the ...
0
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1answer
88 views

How can I run a PostgreSQL outside the standard directories on Linux, ie outside /var/run/postgresql etc?

I need to be able to run PostgreSQL databases outside the standard installation directories, ie run the existing postgres or pg_ctl process pointing to the alternative ports, configuration and data ...
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0answers
204 views

PostgreSQL how to create a scalable location-based query

I need suggestions because I am not good enough. I have a DB in PostgreSQL that runs on AWS (Amazon Web Services). I have a table "user_location" where there are stored the locations of each user ...
0
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2answers
475 views

What is the default size of text field in Postgres?

In the official documentation (http://www.postgresql.org/docs/9.1/static/datatype-character.html), it states text field is variable unlimited length. I wonder what is the default size of this field ...
2
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1answer
2k views

Order by alphabet and then by numbers

I have records like A5 A4 Z1 B2 C7 C1A C11A B1 B4 I want them to be sorted in this manner A4 A5 B1 B2 B4 C1 C11A C7 Z1 using the ORDER BY clause. I want them to be sorted by alphabets ...
12
votes
2answers
6k views

Best way to populate a new column in a large table?

We have a 2.2 GB table in Postgres with 7,801,611 rows in it. We are adding a uuid/guid column to it and I am wondering what the best way to populate that column is (as we want to add a NOT NULL ...
5
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1answer
218 views

Improve SQL query

I'm looking for ideas how to speed-up my query which is based on two tables only. I've added indexes, run vacuum. Tables: CREATE TABLE vintage_unit ( id integer NOT NULL, vintage_unit_date date, ...
2
votes
1answer
650 views

Partitioning MySQL vs PostgreSQL

For our new system we are looking for database server. We considered a lot of pros/cons for MySQL(InnoDB) vs PostgreSQL and the breaking point for us is partitioning. We will choose the one which ...
2
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0answers
944 views

Query optimization on a large table in PostgreSQL

I am not super experienced with databases, just have a college level course under my belt. I am trying to see if an existing query can be optimized. Currently on average takes over 300ms. There is a ...
5
votes
1answer
361 views

How do I monitor PostgreSQL WAL shipping if I'm not using streaming replication?

We have a fairly simple setup to replicate from our on-premise master PostgreSQL database to our presentation tier in AWS. We're using WAL shipping using the archive_command setting. Basically the ...
3
votes
1answer
372 views

Why are query results shortened in pgAdmin 1.18.1?

I've recently installed pgAdmin 1.18.1 and noticed a strange thing: Long json query results are shortened to 256 symbols and then ' (...)' is added. Could someone help me disable this shortening?
3
votes
1answer
1k views

How to change temporary directory for pg_dump?

I'm running out of space from my harddrive which has a 18GB PostgreSQl databse. When I try pg_dump to a different drive, PostgreSQL creates temporary files on the disk it's dumping from, so I run out ...
2
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1answer
1k views

Return ResultSet with column names from postgresql Stored procedures

I have the following postgresql Function: CREATE OR REPLACE FUNCTION readMessage(messageFor INT, qid INT = NULL, ctxt INT = NULL, messageFrom INT = NULL, byTimeStamp BOOLEAN = FALSE) RETURNS SETOF ...
0
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2answers
306 views

Database design for holding read/unread content state

In forum application I have member table and post table. What I need is to keep track of what posts have been read by which members. What I thought about is to have a junction table with two columns: ...
1
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1answer
1k 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 ...
0
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0answers
77 views

set up proper role/group acces on databases and schemes

On my postgresql server I'm struggeling / finding the best practice for a proper role/group setup. I have a number of clients on one machine; each client has its own role: client1; client2;client3 ...
0
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1answer
2k views

Howto disable Postgres listening on TCP?

Simply to avoid many problems in the first place I do not want my postgres server program to accept/listen to anything from any network (i.e. TCP/IP 4/6) connections. My setup is a Postgres 9.1 on ...
0
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1answer
120 views

Nullable One To Many w/Join Table - Indexing

I have a question regarding database design, I am working with PostgreSQL using Hibernate for ORM, the design I inherited includes the following tables users user_id (pk) user_name user_dob ... ...
4
votes
1answer
2k views

Can column name be “Group” in Postgresql or in any databases

I was designing a project which specifies that in a table what column name should be and one of the column name in the specification is "group". I tried creating it but it always throw a syntax ...
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1answer
27 views

Change propagation among connections

If I update a table using one connection and issue a query in another connection immediately after that, is there a chance that I can't see the changes even if it's extremely unlikely?
2
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3answers
2k views

A way to reference the ID in a multi insert transaction? (postgres)

Assuming table "entity.eid" is auto incrementing, I want to be able to reference the autoincrement value assigned later in the same transaction. The way I have been doing this is by doing multiple ...
2
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0answers
115 views

How can I use an environment variable in a Postgres function?

Let's say I have a windows user environment variable SOME_STRING. Is it possible to use its value in a PL/pgSQL function? If not, do I need to use an untrusted language (like PL/pythonu) or can I ...
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1answer
1k views

Tool to synchronize PostgreSQL DDL and data databases [closed]

We have several developers who each have a local database for testing. We often make DDL and/or data changes to the master database that we need to replicate to each development machine. The framework ...
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0answers
66 views

using separate schemas or databases

For my web application with a postgresql backend I'm now looking into schema's. As I switched from MySQL to Postgresql(because of (amongst others) the proper geospatial extension) I was not aware of ...
0
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1answer
210 views

Query Pane Docking in pgAdmin3

I just started using pgAdmin3. I do not like having to have a new window when I want to run ad hoc SQL queries. Is there a way to do dock it within the top level app and actually show in the main ...
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0answers
334 views

postgresql multi column unique or check constraint

First a word of pleading. To say I am a newbie to postgresql would be an insult to the newbies! I have been working on this for only a day or so. I have found several questions on this site, and ...
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1answer
1k views

Restoring PostgreSQL 9.1.9 backup with 9.3.0 results in error [closed]

How can I resolve the following errors in 9.3.0: psql mydb < ~/mydb_2013-10-25.backup.tar results in ... ALTER TABLE ALTER TABLE ALTER TABLE ERROR: could not open file "$$PATH$$/2309.dat" for ...
2
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1answer
2k views

PostgreSQL Change owner of all tables under a specific schema

I am trying to change the owner of all tables under the same schema in one command line. i.e: alter table schema_name.* owner to newowner Is there a way to accomplish that?
0
votes
1answer
158 views

Best read performance when every query is known, and the data doesn't change

I'm trying to maximise performance on an underpowered PostGIS server - 1 core, 4 CPUs. The data (OpenStreetMap) will be infrequently (monthly?) loaded, and never changes otherwise. Each of the 30 or ...
1
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1answer
442 views

PostgreSQL 9.2 number of days in a tstzrange?

How can the number of days contained within a range be found? For example, with these timestamp ranges, get these (integer) number of days: tstzrange('2013-10-01 07:00', '2013-10-01 07:15') | 1 ...
3
votes
1answer
172 views

PL/pgSQL functions and optimizations fences?

I am newbie on DB stuff. And my DB knowledge is very old (around MSSQL2000). All what I remember is, the stored procedures are faster than ordinary queries because it avoid query compilation and ...
1
vote
2answers
267 views

to use full text search or not?

In my web app, I have a web page for admins that displays the following fields: user id (numeric) device id(numeric) device description (text) cell phone number (text) user name (string ... but ...
2
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0answers
54 views

Evenly sized partitions in Postgresql

All, My database has several years worth of temporal data that I am currently partitioning my the month. The problem is that some months there are hundreds of millions of records while other months ...
9
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2answers
10k views

Efficient query to get greatest value per group from big table

Given the table: Column | Type id | integer latitude | numeric(9,6) longitude | numeric(9,6) ...
0
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0answers
283 views

Data migration of specific data from one DB to another

I am new to this site, I have one major question of data migration, I apologize before hand if the question is too silly. I have two data base on one server, I have one table with the same schema on ...
3
votes
1answer
1k views

pg_dump custom format between postgres versions

I was wondering how stable the custom pg_dump format is between Postgres versions. Can I for example restore a custom format dump created with Postgres 8.x in postgres 9.x? Background: I am building ...
1
vote
1answer
291 views

Get maximum from aggregated values in a query

I have a table details it has a column kills and a column player_slot and a column match_id. I want to find the maximum difference between the SUM of kills for player_slot 0-4 and 128-132. Can someone ...
2
votes
1answer
585 views

Why Django session table grows on PostgreSQL

I use PostgreSQL 9.1.6 via PgBouncer 1.4.2 in my Django 1.4.8 project. django_session table grows all the time. VACUUM does not help. VACUUM FULL runs for hours. Only TRUNCATE helps usually. The ...
0
votes
1answer
793 views

How can you have a combined primary key for one table?

I have exactly the same question as posted here. But in my case I do not use MySQL but Postgres. Can this be done with Postgres? All things indicate I can not use a combined index in Postgres, so ...
1
vote
2answers
95 views

Postgres: What happens if your slave DB went down temporarily?

I have a master DB that is replicated to a slave DB through binary replication. What happens if this slave DB were to go offline for a period of time? Would it eventually catch up with the master as ...
0
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1answer
900 views

Bulk loading to partitioned table

I am designing a database application which will be using PostgreSQL 9.3. My question is regarding bulk loading a CSV to a partitioned table. I have done a lot of research, but I'm still unsure of ...
0
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1answer
76 views

Can Postgres raise warnings if joins are inconsistant with foreign keys?

Like most relational databases, PostgreSQL provides foreign keys as a means of providing referential integrity CREATE TABLE job ( id serial NOT NULL PRIMARY KEY ) CREATE TABLE jobtuning ( id ...
3
votes
2answers
1k views

How to take pg_dump of a very large postgres database?

I have a production database server running Postgres 8.4 on Cent OS 6.5.The volume of data has increased recently and within few months database now has 18500 tables amounting to approx 350GB database ...
0
votes
1answer
433 views

Simple PostgreSQL lookup table is inexplicably slow

I'm trying PostgreSQL 8.4.14 for storing triples, pieces of data of the form (String, String, String). For speed, I'm not repeatedly storing strings but rather using two tables: main table triples ...
0
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3answers
863 views

Performance of primary key IDs with gaps (but in sequential order)

I know that having non-sequential IDs is bad for index performance. But assuming all my IDs are created in correct order, but with large gaps: i.e: 154300000 283700000 351300000 464200000 ...will ...