Welcome to the second part of our series of posts on the latest features of PostgreSQL 15. In this part, we will dive deeper into more exciting and innovative features that PostgreSQL 15 has to offer. PostgreSQL is a powerful and widely-used open-source relational database management system that has been gaining popularity among developers and enterprises alike. It has a reputation for being a robust, scalable, and secure database system that can handle large amounts of data and complex queries.
Parallel query execution on remote databases
In a distributed database environment, data is stored across multiple databases that may be located in different physical locations. In such an environment, performing queries that involve data from multiple databases can be challenging due to the need to transfer large amounts of data among the databases. we tend to use this for durability of the database servers, or when the time needed to retrieve all the data across the servers in different zones.
To overcome this challenge, parallel query execution on remote databases can be achieved through various techniques. Parallel query planning involves dividing a query into smaller sub-tasks that can be executed in parallel on different databases. This approach involves optimizing the plan to minimize data movement between databases, which helps to reduce the time required to complete the query.
Storage interface
when creating the tables default in the Postgres are stored in a B-tree which is optimized for sorting and searching across the data. and there are several types: Hash,GiST, SP-GiST, GIN, BRIN. now using this method you can change the table storage type and this is actually very useful excluding the time needed to regenerate the table from the ALTER we will be able to switch between the storage methods experiencing the feature of each one.
we are not done yet next time we will have a talk about more top features and by the end we will start the series of discovering the Architecture that support such Top features.
SELECT DISTINCT
continue the talks about the parallelism of the previous features you can now do the above Query in parallel database.
I mentioned the TOP features on PostgresSQL 15
to read P1
Next time we will start thinking about the implementation behind each feature.
Reference
1- My brain
2- PostgreSQL Doc
Thanks for reading
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