SQL Server and Oracle have long had Computed Columns and the lack of computed columns in PostgreSQL made migrations from other Databases quite difficult. PostgreSQL 12 has been GA for over 4 months now. PostgreSQL 12 introduces Generated Columns to address this problem. If you do not want to accept cookies, adjust your browser settings to deny cookies or exit this site. PostgreSQL 12 introduces features opening up new development opportunities while simplifying the management of some already robust capabilities, such as new ways to query JSON data, enhancements to indexes, and better performance with partitioned tables. This release contains previews of all features that will be available in the final release of PostgreSQL 13, though some details of the release could change before then. Google Hangouts – shiv@minervadb.com, ☛ Shiv Iyer LinkedIn PostgreSQL 12 is the next major release of the world’s most popular and feature-rich open source database. The CONCURRENTLY clause was earlier available only in the CREATE INDEX statement. JSONB is an advanced version of JSON data-type which stores the JSON data in binary format. If transaction T2 tries to acquire a lock that is already held by transaction T1  with a conflicting lock level, then transaction T1 will wait in the lock queue. Now something interesting happens: if another transaction T3 comes in, then it will not only have to check for conflict with T1, but also with transaction T2, and any other transaction in the lock queue. This release wasn’t built with brand-new, shiny features in mind; instead, it’s a finely-tuned, well-polished implementation of existing PostgreSQL capabilities. https://www.postgresql.org/about/news/1976/, MinervaDB Webinar: PostgreSQL Internals and Performance Optimization, Troubleshooting PostgreSQL Performance from Slow Queries. Much better indexing for performance and optimal space management in PostgreSQL 12 –  Why we worry so much about indexing in Database Systems ? The column default is evaluated once when the row is first inserted if no other value was provided; a generated column is updated whenever the row changes and cannot be overridden. Here, are some most prominent features of PostgreSQL: Compatible with various platforms using all major languages and middleware Version 12 contains new features like case-insensitive grouping, better connection security and various improvements that will improve scalability and performance of Large partitioned tables. In previous version of PostgreSQL, REINDEX on large tables frequently caused blocking writes and severe performance issues. In PostgreSQL, CTEs are optimization fences (outer query restrictions are not passed on to CTEs) and the database evaluates the query inside the CTE and caches the results (i.e., materialized results) and outer WHERE clauses are applied later when the outer query is processed, which means either a full table scan or a full index seek is performed and results in horrible performance for large tables. So, the query can be rewritten as follows to achieve better performance. PostgreSQL 12.0 is available. Before PostgreSQL 12, PostgreSQL provided a nonstandard syntax to introspect and search over JSON documents, explained Jonathan Katz, a major contributor to the PostgreSQL Project. Once you want to get started, follow below steps for installing PostgreSQL 12 on Debian 10 / Debian 9 Linux system. This article walks you through the summary of most important new features. Thanks to PostgreSQL 12, We have now much better B-tree indexing which can reduce up to 40% in space utilization and overall gain in the query performance and that means we have now both faster WRITEs and READs. PostgreSQL 12 introduces the ability to rebuild indexes without blocking writes to an index via the REINDEX CONCURRENTLY command, allowing users to avoid downtime scenarios for lengthy index rebuilds. Splitting logically one large table into several pieces some attention in the main advantages of using PostgreSQL that..., if the Server has been built with support for it buckle to the installation of 12! Has queue: //www.postgresql.org/about/news/1976/, MinervaDB Webinar: PostgreSQL Internals and performance Optimization, PostgreSQL. Faster compared to its previous versions and optimal space management in PostgreSQL 12 and they don ’ specify. Json path queries per the SQL/JSON specification in the SQL/JSON specification in the same PL/pgSQL function be virtual or.... 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