This article describes the definition of predicate pushdown and why databases should perform predicate pushdown.
This article focuses on the IN-list transformation of PolarDB, which showcases the query rewriting capabilities of PolarDB.
This article discusses PostgreSQL random query sampling and comparative performance (with examples).
This article shows examples of depth-first and breadth-first searches.
Part 4 of this Series focuses on the optimization of Group By to explore the possibility of equivalent changes and describes the query rewriting strategy of grouping down.
Part 3 of this Series introduces aggregation subquery promotion, a rewrite strategy for aggregation-related subqueries, and the pitfalls of this rewrite strategy.
This short article explains retention and UV statistics.
This article introduces how MySQL 8.0 optimizer turns a simple string into an execution sequence the database executor can return the data to the client.
This article introduces the complex transformation process of subqueries, partitioned tables, and JOIN operations.
This article introduces Steampipe and explains how it can help reduce the manual steps to execute on Alibaba Cloud’s web console and retrieve details from the command line.