How to create GUID in Windows format in Postgres 9.0+? I tried function CREATE or REPLACE FUNCTION public.getguid() RETURNS varchar AS $BODY$ DECLARE v_seed_value varchar(32); BEGIN select md5( inet_client_addr()::varchar || timeofday() || inet_server_addr()::varchar || to_hex(in...
I am trying to implement some business logic in a PL/pgSQL function. I have hacked together some pseudo code that explains the type of business logic I want to include in the function. Note: This function returns a table, so I can use it in a query like: SELECT A.col1, B.col1 F...
Extensibility is one of the most powerful feature in PostgreSQL. You can add new functionality for a particular use case by using contrib module and install it usingCREATE EXTENSION. In this section, we are going to learn how to create a simple contrib module and how to use its functionality...
Alternatively, you can view it from the pgadmin4 tool. Pgadmin4 is a web-based tool that is used to manage the PostgreSQL database. To view the tables created in DemoDatabase, Connect to PostgreSQL server 🡪 Expand Databases 🡪 Expand Demo Database 🡪 Expand Public 🡪 Expand Tables....
"Get or create" is a very common operation for syncing data in the database, but implementing it correctly may be trickier than you may expect. If you ever had to implement it in a real system with real-life load, you may have overlooked potential race c
Learn how to create a PostgreSQL database in 5 easy steps. This guide will equip you with the knowledge and skills to create efficient, scalable databases.
In PostgreSQL, the “CREATE” command can be executed with the “VIEW” keyword tocreate a view, as demonstrated in the following syntax: CREATE VIEW name_of_view AS select_query; Here, -“CREATE VIEW” is a command that creates a new virtual table. ...
How to make PostgreSQL functions atomic? Assume I have some PostgreSQL functions like the following: CREATE FUNCTION insertSth() RETURNS void AS $$ BEGIN INSERT INTO ...; END; CREATE FUNCTION removeSthAfterSelect() RETURNS TABLE(...) AS $$ ...
Instead, you can create the functions pg_grant() and pg_revoke() found at http://blog.bhushangahire.net/2009/06/17/grant-privileges-to-all-tables-in-a-database-for-postgresql/ The parameters to both functions are: User Role Permissions Object name, may be a pattern. "%...
Then I edited my postgresql.conf, and switch force-parallel option to on, and restarted postgresql. This time, Postgresql-11 refused to run my function and said: ERROR: cannot execute CREATE INDEX during a parallel operation. postgresql index stored-procedures functions parallelism Share Improve th...