open file named postgresql.conf add this line to that file then open file named pg_hba.conf and add this line to that file It allows access to all databases for all users with an encrypted password restart your server
Hi i have a question i know this was posted many times but i didn’t find an answer to my problem. The problem is that i have a table and a column “id” i want it to be unique number just as normal. This type of column is serial and the next value after each … Read more
It looks like in Ubuntu that header is part of the libpq-dev package (at least in the following Ubuntu versions: 11.04 (Natty Narwhal), 10.04 (Lucid Lynx), 11.10 (Oneiric Ocelot), 12.04 (Precise Pangolin), 14.04 (Trusty Tahr) and 18.04 (Bionic Beaver)): So try installing libpq-dev or its equivalent for your OS: For Ubuntu/Debian systems: sudo apt-get install libpq-dev On Red Hat Linux (RHEL) systems: yum install postgresql-devel For Mac Homebrew: brew install postgresql For Mac MacPorts PostgreSQL: gem install pg — –with-pg-config=/opt/local/lib/postgresql[version number]/bin/pg_config … Read more
From what I’ve read, this error means that you’re not referencing the table name correctly. One common reason is that the table is defined with a mixed-case spelling, and you’re trying to query it with all lower-case. In other words, the following fails: Use double-quotes to delimit identifiers so you can use the specific mixed-case … Read more
To answer your question, there are several ways provide a password for password-based authentication: Via the password prompt. Example: psql -h uta.biocommons.org -U foo Password for user foo: In a pgpass file. See libpq-pgpass. Format: <host>:<port>:<database>:<user>:<password> With the PGPASSWORD environment variable. See libpq-envars. Example: export PGPASSWORD=yourpass psql … # Or in one line for this … Read more
It’s because the name column on the bar table does not have the UNIQUE constraint. So imagine you have 2 rows on the bar table that contain the name ‘ams’ and you insert a row on baz with ‘ams’ on bar_fk, which row on bar would it be referring since there are two rows matching?
String literals Escaping single quotes ‘ by doubling them up -> ” is the standard way and works of course: Plain single quotes (ASCII / UTF-8 code 39), mind you, not backticks `, which have no special purpose in Postgres (unlike certain other RDBMS) and not double-quotes “, used for identifiers. In old versions or if you still run with standard_conforming_strings = … Read more
There’s a very interesting discussion of this type of issue here: http://www.titov.net/2005/09/21/do-not-use-order-by-rand-or-how-to-get-random-rows-from-table/ I think with absolutely no assumptions about the table that your O(n lg n) solution is the best. Though actually with a good optimizer or a slightly different technique the query you list may be a bit better, O(m*n) where m is the number … Read more
I figured it out. Had to set listen_addresses=’*’ in postgresql.conf to allow for incoming connections from any ip / all ip
The default authentication mode for PostgreSQL is set to ident. You can access your pgpass.conf via pgAdmin -> Files -> open pgpass.conf That will give you the path of pgpass.conf at the bottom of the window (official documentation). After knowing the location, you can open this file and edit it to your liking. If that doesn’t work, you can: … Read more