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Exploring PostgreSQL Search Techniques with Elixir and Ecto
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Source: ideax.sk
The article provides an in-depth analysis of how to implement effective search functionalities using PostgreSQL in conjunction with Elixir and Ecto. It covers multiple search approaches, including trigram matching using the pg_trgm extension, which allows for similarity checks between strings by analyzing trigrams—groups of three consecutive characters. The author demonstrates how to execute similarity queries and emphasizes the importance of understanding the underlying mechanics of search functions. The article also discusses TS vectors, which parse text into tokens based on language configuration for more accurate searches, and semantic search using vector embeddings to understand the meaning behind search terms. The author presents various SQL queries as examples to illustrate how to leverage these features effectively and highlights the significance of indexing for performance improvements. In conclusion, the article stresses that the choice of search methodology largely depends on the specific dataset and its context, while offering practical examples of how to use these PostgreSQL features within an Elixir application.
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