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0answers
234 views

postgresql 9.3 with Ubuntu 14.04.1 LTS throw 's ERROR: invalid page in block 105 of relation base/16385/17407

This is Ubuntu 14.04.1 LTS with postgresql 9.3 in production, Now i got this below error's in log. # tail -f /var/log/postgresql/postgresql-9.3-main.log 2015-01-08 14:10:16 IST CONTEXT: automatic ...
-2
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1answer
83 views

Postgresql function to create table in other database

I Want a function to create Table in the different database , Database name is the argument for the function and table structure and names are static {No need to pass as the arguments}
0
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1answer
54 views

How can I always get Timestamp in certain format without having to explicitly define it everytime

When I run a select on a timestamp I get something like: 2015-01-02T23:22:36.000Z, 1/7/2015 11:03:31 AM In order to format properly I have to do: SELECT to_char(entered, 'MM/DD/YYYY HH12:MI:SS AM')...
5
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1answer
2k views

Scaling PostgreSQL TRIGGER(s)

How Postgres triggers mechanism scales ? We have a large PostgreSQL installation and we are trying to implement an event based system using log tables and TRIGGER(s). Basically we would like to ...
3
votes
2answers
383 views

Is there a way to “SELECT and TRUNCATE” without losing new data?

I have an application that writes raw log files to a table called new in a PostgreSQL database -- lots of rows and lots of duplicate data. Via a cron job running every minute, I normalize the raw data ...
1
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1answer
111 views

“No Loop” Constraint for hierarchical data in postgresql

I've got table like this in postgres: id primary key parent_id foreign key on id some data columns I need no a constrain which prevents cycles on the parent relations. There might be more tree in ...
-4
votes
1answer
39 views

I cant connect to PosgreSQl throgh PG Admin

While i try to connect throgh PGAdmin this error message displayed " Error connecting to the server: FATAL: Peer authentication failed for user "postgres" "
0
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1answer
245 views

Restoring a database using Postgres data files instead of .sql files

I backed up my Ubuntu 14.04 system using rsync to a USB stick, but apparently it wasn't formatted for booting. The original disk has been erased and I put a fresh install of Ubuntu on it. In migrating ...
4
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1answer
877 views

Monitoring Amazon RDS with pgtop

I recently migrated a Postgres database to Amazon RDS and I am lacking a good live monitoring tool. I tried pgtop, but I can't get it to work on Amazon. I can see the header with the DB statistics (...
-6
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1answer
1k views

How do i convert bigint to int in postgreSQL [closed]

I wanted to find out negative values in one of the columns of type bigint. so when i do select *from tablename where columname(bigint) <0 ... its throwing me an error. SQL Error [42883]: ERROR: ...
4
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2answers
215 views

Should database be denormalized if I need an index across multiple tables

I have a catalog of album and song names. The song has a foreign key to the album table. I expect queries like: SELECT * FROM song s JOIN album a ON a.id = s.album_id WHERE LOWER(CONCAT_WS(' ', album....
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2answers
212 views

Logging all the queries in postgres

I am using Postgres as my Database. I need to know whether I can extract all the queries that got executed with out logging them as logging all the queries will degrade the performance of database. So,...
4
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1answer
12k views

Postgres incomplete startup packet error

I am attempting to install Postgres 9.3 on Ubuntu 14.04 and I am getting an irksome error on startup. Here's what I'm seeing: $ sudo service postgresql restart * Restarting PostgreSQL 9.3 database ...
0
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1answer
158 views

Syntax Error In Postgresql Function [closed]

Why am I getting: ERROR: syntax error at or near "'SELECT '" In: CREATE OR REPLACE FUNCTION GetListings (lon double precision, lat double precision, schemas name[]) RETURNS TABLE( schema ...
2
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1answer
608 views

Postgres Restore Not Restoring Bytea Data

This is a very urgent situation. We have a postgres 9.4 database installed on a CentOs machine. We are trying to take a backup from a Heroku Postgres database and restore it to the database on ...
3
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2answers
372 views

CRUD operations on json data

I have a large chunk of json data associated with each id and I have to somehow get the data for my front end by querying through that large chunk. My TaskDetails table has a structure something like:...
0
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1answer
21 views

Selecting one variant out of different similar results

I have a table that looks as follows: Book Format Contents A html ... A markdown ... B html ... C markdown ... I want to return only 1 version of a book. ...
8
votes
1answer
382 views

unable to insert row at id, but row does not exist

Here is the weird problem i am facing. I am trying to enter data using following query insert into product_product (id, product_tmpl_id, make_equip, model_equip, name_template, serial_num_equip, ...
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1answer
38 views

PostgreSQL Date Check Costraint

How could I add a Check-costraint for Date type in PostgreSQL? For example, CHECK 'DateXYZ>01/02/98' A typecast is needed?
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2answers
1k views

Understanding multiple table join with aggregation

I have a basic question on how JOIN works on multiple tables. I want to count occurrences of Foreign Key in link1 & link2 CREATE TABLE main ( id SERIAL PRIMARY KEY, name text NOT NULL ); ...
1
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1answer
120 views

Can not run PostgreSQL after drop table

I've deleted database from PostgreSQL and after this I can do nothing. Here what i receive with createuser $ createuser -D new_user createuser: could not connect to database postgres: FATAL: role "...
2
votes
1answer
817 views

Postgresql Rename Table without Updating View Definitions

I've found out today that renaming tables in Postgresql also renames the VIEW definitions for Views that use the table I renamed automatically? Is there any way to turn this off? So I rename the ...
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2answers
66 views

Get the pais_id not associated to fabricante_distribuidor_id and producto_solicitud_id, the opposite from SELECT query

I have this query for get all the pais_id given a fabricante_distribuidor_id and producto_solicitud_id, the query works fine. SELECT DISTINCT nom.pais_id FROM negocio.fabricante_producto_solicitud ...
0
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0answers
276 views

PostgreSQL replace primary key and converting non-serial to serial type [duplicate]

I'm basically building my own version of phpPgAdmin (if I get good enough to make it good enough I'll post it on a repository hosting service) and currently I'm revising my primary key tool to replace ...
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0answers
59 views

How to use the value from record like as varchar?

I'm trying update a old table with result of selec for another tables but get a error using this sintaxe (e.g.): DO $$ DECLARE _roles refcursor; _onerole varchar; _record RECORD; ...
2
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2answers
214 views

Does changing a Postgresql table's tablespace compact it like “vacuum full” or “cluster”?

I need to reclaim disk space in a table in a Postgresql 9.3.2 database to be used for other tables. The standard suggestions to accomplish this are: "VACUUM FULL" or "CLUSTER" or copy the contents ...
1
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1answer
2k views

Postgresql memory usage [closed]

I'm trying to optimize my database (its quite heavy), I have external server only for it with 6GB RAM. I was looking for settings and saw that WORK_MEM is setted to 36MB. I thought it is possible just ...
3
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0answers
88 views

Can CTE sub-statements be prevented from executing at all?

Through this strategy, time consumed by queries for my application have dropped to extreme lows; however, some queries consume more milliseconds than necessary. The reason why is that upon ...
10
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3answers
2k views

Email address unique or primary key?

I am a newbie in databases. I read around and found out that it's probably not a great idea to use email address as primary key because string comparisons are slower which effects performance in ...
1
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1answer
80 views

postgresql: accept subdomain wildcards?

I want to accept all db connections from servers with domain mydomain.com so that all subdomains like tiger.mydomain.com, venus.mydomain.com will have access to the postgresql server. I've read that ...
4
votes
1answer
267 views

Rollback on \include error in psql

I'm trying to execute an sql script file in a single transation. The file contains includes for some other scripts which in my example create some tables. It looks like this: \include ../tables/...
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1answer
96 views

pgAdmin-III - Option to load a favorite automatically when opening query window

pgAdmin-III - Query window option Does pgAdmin-III has any option to load a default favorite file automatically when opening new query window? This would be much useful to have commit/rollback ...
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0answers
270 views

export data to xml by the use of query to xml then importing it using xpath

i have use QUERY_TO_XML function in order to export data to xml , after that i want to export this data. this data might contain reserved chars in the xml tags like "' & ..." ex electrical ' ...
0
votes
1answer
462 views

Concurrent SELECT and UPDATE in multiprocessing python

I have to randomly match about 20 million rows in two tables without using the same row twice using PostgreSQL 9.3.5. Both tables have the following structure CREATE TABLE de_sim_points_end ( -- ...
0
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1answer
89 views

Postgres Table Ownership

I'm new to PostgreSQL and I'm trying to change the table owner for a bunch of tables. I was able to change the ownership by logging in a the postgres user and executing alter table owner to user1, but ...
4
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3answers
308 views

Which tool to compare an Oracle database with a Postgresql database?

We are currently migrating an Oracle database 10gR2 to a Postgresql database 9.3. Thanks to Hibernate, all tables can be recreated seamlessly. However, the Oracle database is huge. We are going to ...
16
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2answers
7k views

Refresh materalized view incrementally in PostgreSQL

Is it possible to refresh a materialized view incrementally in PostgreSQL i.e. only for the data that is new or has changed? Consider this table & materialized view: CREATE TABLE graph ( ...
2
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1answer
124 views

What does the Postgres <-> operator do?

I was reading through the Postgres documentation on materialized views and in one example they use the following: SELECT word FROM words ORDER BY word <-> 'caterpiler' LIMIT 10; I tried to ...
8
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2answers
14k views

How to create a temporary table using VALUES in PostgreSQL

I am learning PostgreSQL and trying to figure out how to create a temporary table or a WITH declaration that can be used in place of regular table, for debugging purposes. I looked at the ...
0
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0answers
112 views

Possible to get log file with only statements sent to Postgres from my app (and not from psql prompt)?

I'm using an ORM in my app and would like to see all statements sent to Postgres so that I can figure out exactly what the ORM is doing. In the Postgres config file I added log_statement = 'all' to ...
0
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1answer
45 views

How can I aggregate multiple results from another table using something like BOOL_AND?

I'm using PostgreSQL as my database. CREATE TABLE users ( id SERIAL NOT NULL, name TEXT NOT NULL, PRIMARY KEY (id), UNIQUE (name) ); CREATE TABLE groups ( id ...
0
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2answers
1k views

insert inserted id to another table

Here's the scenario: create table a ( id serial primary key, val text ); create table b ( id serial primary key, a_id integer references a(id) ); create rule a_inserted as on insert to a do ...
3
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1answer
329 views

Are CTEs multithreaded?

Here and here seem to suggest that they are, but I've also been told (source unlocatable) that a multi-row single-statement insert will only use one thread for all writing, that to multithread it, the ...
1
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2answers
600 views

Performance of single vs multiple column unique constraint

I'm using PostgreSQL 9.3. I want to understand if I have an option to make a constraint unique across the entire table vs. unique across a subset of the table (i.e. by using 2 columns in the unique ...
1
vote
1answer
90 views

Table-based custom type does not verify check constraints

Is there any way for a table-based custom type to obey the table check constraints, other than creating my own type based on the table? Assume the following table that serves as a source for the ...
3
votes
1answer
592 views

Monitoring the Postgres query parser

As I understand it, when you send a query to Postgres like: SELECT id FROM table1 WHERE name = $1; Postgres will create a query plan. The plan will be cached for the same query in the same session....
0
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1answer
316 views

How can I create a bool column for a view based on the result of a statement?

I'm using PostgreSQL as my database. CREATE TABLE groups ( id SERIAL NOT NULL, name TEXT NOT NULL, PRIMARY KEY (id), UNIQUE (name) ); CREATE TABLE users ( id ...
2
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1answer
1k views

Get products of category plus all child categories till leaf nodes

We have a hierarchy which looks this: Now the problem is that most products are only connected with 1 category, which is most of the time the lowest level. I am trying to get ALL products below a ...
1
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0answers
255 views

Are A or D series VMs better for deploying PostgreSQL on Azure?

In Azure there are VMs that have local storage either as spinning disk (A-series) or SSD (D-series). Considering this space is wiped on reboot... Is there a benefit to choosing the SSD option for ...
6
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1answer
3k 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): ...