No kidding — A first attempt of a rationalization — Since everybody else wrote already about AI, I have to do it, too. I went to check out the landscape of vector database systems, a database technology variant that receives a lot of attention right now. Usually you expect a few players in an established technology space, maybe a few…

Restartable Yugabyte Nodes on Compute Instances — When a compute instance restarts for any reason, the Yugabyte master and tserver running on the compute instance should automatically restart as well. This blog describes one approach to accomplish the automatic restart of Yugabyte’s components. The previous blog Deployment into Google Cloud (Part 1) followed the Yugabyte instructions that…

Single database deployment into 37 Google Cloud regions — Goal This is a first step in my journey to a global Yugabyte database deployment as database layer for a global distributed application. The goal is to have a single global database with nodes in all regions of a cloud, here Google Cloud (currently there are 37 regions). The main reasons…

Using ECA rules for acting on messages in transactional queueing — This blog discusses an approach to execute ECA (Event-Condition-Action) rules on JSON objects within database transactions in PostgreSQL — specifically on transactional queues. This guarantees exactly once execution and consistency of rule execution in case of failures (independent of the underlying reason). Background ECA rules is an established concept in the…

Architecture Solution — Many organization strive to be prepared for cloud region or cloud service outages, as unlikely as they are. Other organizations must have a disaster recovery plan and process in place because of internal policies or external requirements or regulations. This blog presents a disaster recovery process that reestablishes the original…

Reusing existing function for correctness check — Syntactic correctness of stored expressions The evaluate() function is a useful approach for using stored expressions in WHERE clauses of SQL queries, as outlined in Part 1: evaluate() PostgreSQL Function for Evaluating Stored Expressions (Part 1). In Part 1, in section “Improvement”, I highlighted the fact that expressions are stored in a varchar column (since…

Standing on the shoulders of database giants — Query predicates as data I am working on a use case where a SQL query predicate (used in a WHERE clause) is stored in a table column as text. This predicate is used in SQL queries when selecting JSON objects from tables. A good example is customers shopping for cars. For each customer their…

Some performance numbers when inserting JSON into AlloyDB for PostgreSQL — As outlined in Part 1 (JSON in PostgreSQL (Part 1: Setup and Measurement)) this blog shows the performance numbers I got with AlloyDB for PostgreSQL. Overview of setup The table and query is exactly the same as in Part 1. …

Observations on JSONB insert elasticity — I was wondering about the JSON document insert performance in PostgreSQL and the extent it varies with document size. Overview PostgreSQL supports JSON as a data type and I was curious how insert performance changes with the size of a JSON document being inserted. To get an impression to the extent…