In my work, I am running a complex query. I canceled it and went home yesterday. It is impossible to terminate the query later this morning. There is also a “after termination” “End” function. A co
Month: September 2021
What type of NOSQL database is best suited to store hierarchical data?
What type of NoSQL database is best for storing hierarchical data?
For example, I want to store a forum post with a tree structure:
original post
+ re: original post< br /> + re: origi
PostgreSQL – Refreshing materialized view Concurrently causes table expansion
In PostgreSQL 9.5, I decided to create a materialized view “effect” and schedule hourly concurrent refreshes, because I want it to be always available:
< /p> REFRESH MATERIALIZED VIEW CONCURR
How to add time-related triggers in PostgreSQL?
Regarding how: I am confused and powerless:
>After setting up the database, add a trigger to the postgresql database, that is, add a trigger by clicking a hyperlink
>Write a trigger function
PowerDesigner writes Name to the PD7 in Comment.
Background:
I used PowerDesigner when developing projects recently. It is very uncomfortable to look at the fields in the database design, because the Chinese people still like to read Chines
PostgreSQL – “INSERT INTO … FETCH All from …” unable to compile
I have some functions to return cursors (refcursor) on PostgreSQL 9.6:
CREATE OR REPLACE FUNCTION public.test_returning_cursor( )
RETURNS refcursor
IMMUTABLE
LANGUAGE plpgsql
AS $$
DECLARE
[Big Data] In-depth analysis of the distributed algorithm of the NOSQL database
In-depth analysis NoSQL database distributed algorithm < /section> Although the NoSQL movement did not bring fundamental technological changes to distributed data processing, it s
PowerDesigner collaboration with SQL Server () data model and database of database
Data model conversion into database Generate database script according to DB design, “Database”-“Generate Database…”;
< /span>
Set the script storage path and name, select “Direct generati
Deploy high performance PostgreSQL cluster
Postgres-XL is composed of three major components: the GTM (Global Transaction Manager), the Coordinator and the Datanode. Their features are given in the following sections. GTM (Global Transactio
PostgreSQL – How do I know the actual count in a big table of high insertion rates
Suppose I have a table with exactly 10M rows. I need to know the exact number of rows. It takes 5 seconds for COUNT requests. Suppose 100 rows are added to the table every second.
If I now re