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 […]
Common Table Expressions (CTEs) provide a way to define temporary named result sets within a SQL statement in PostgreSQL. CTEs are useful for breaking down complex queries into smaller, more manageable parts and can be […]
In PostgreSQL, memory allocation occurs at various stages during the execution of queries and other database operations. Here are some key points where memory is allocated in PostgreSQL: It’s important to note that memory allocation […]
In PostgreSQL, the number of blocks that a process can read from a single sort run in one read is controlled by the work_mem configuration parameter. The work_mem parameter specifies the amount of memory allocated […]
In PostgreSQL, the query optimizer has several access paths at its disposal to determine the most efficient way to access and retrieve data from tables or indexes. The choice of access path depends on factors […]
In PostgreSQL, multipass hash joins are a type of join algorithm used to efficiently process join operations between large tables. Unlike traditional hash joins that require loading the entire hash table into memory, multipass hash […]
In PostgreSQL, the clustering_factor is a statistic that provides information about how well the physical order of rows in a table or index matches the logical order defined by the clustering key. It is particularly […]
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