In PostgreSQL, there are several reasons why SQL statement plans can change for the worse over time. These changes can result in decreased query performance and unexpected behavior. Here are some common factors that can […]
Introduction: The PostgreSQL query optimizer plays a critical role in generating efficient execution plans for SQL queries. However, there may be instances where hints provided to the optimizer are not considered, resulting in unexpected query […]
In PostgreSQL, you can obtain the execution plan with runtime information using the EXPLAIN (ANALYZE, VERBOSE) command. This command provides a detailed execution plan along with actual runtime information, including the number of rows processed, […]
Introduction: PostgreSQL’s query optimizer plays a crucial role in determining the most efficient execution plan for SQL queries. In this article, we delve into the concept of SQL plan directives and their role in optimizing […]
Introduction: Adaptive joins are an exciting feature in PostgreSQL that dynamically adjust the join method during query execution to optimize performance. This article explores adaptive joins in PostgreSQL, their benefits, and how they can improve […]
In PostgreSQL, the optimizer selects which indexes to use for query execution based on cost-based optimization. The goal is to choose the most efficient index or combination of indexes that minimize the total cost of […]
In PostgreSQL, plans are implemented using the query execution plan generated by the query optimizer. Aggregation and spool operations are key components in query plans that allow for efficient processing of aggregate queries. Let’s explore […]
User-Defined Functions (UDFs) in PostgreSQL allow you to define custom functions to extend the functionality of the database. UDFs can be written in various programming languages, such as SQL, PL/pgSQL, Python, or any other language […]
In PostgreSQL, you can use the isalnum function to determine if a string is alphanumeric or not. The isalnum function returns TRUE if all characters in the string are either alphabetic or numeric, and FALSE […]
In PostgreSQL, the maximum number of columns for a table is limited by the system configuration parameter MaxTupleAttributeNumber, which is set to 1664 by default. However, it is possible to increase this limit by modifying […]
MySQL, InnoDB and Oracle are registered trademarks of Oracle Corp. MariaDB is a trademark of Monty Program AB. All other trademarks are property of their respective owners. Other product or company names mentioned may be trademarks or trade names of their respective owner. Copyrights © 2010-2023 All Rights Reserved by MinervaDB®.