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Implementing Video Search Autocomplete with PostgreSQL Trigrams

DEV Community·ahmet gedik·6 months ago
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#postgres#search#autocomplete#webdev#region
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Why Fuzzy Autocomplete Matters for European Content

At ViralVidVault , we index video titles from 7 European regions. Users searching for a Swedish video might type "goteborg" instead of "Goteborg" or misspell a Dutch title. Standard LIKE queries fail hard on typos. PostgreSQL trigrams handle this gracefully.

Setting Up pg_trgm

CREATE EXTENSION IF NOT EXISTS pg_trgm ;

CREATE TABLE videos ( id SERIAL PRIMARY KEY , video_id VARCHAR ( 16 ) UNIQUE NOT NULL , title TEXT NOT NULL , channel_title TEXT , region VARCHAR ( 4 ) NOT NULL DEFAULT 'GB' , view_count BIGINT DEFAULT 0 , virality_score FLOAT DEFAULT 0 , fetched_at TIMESTAMP DEFAULT NOW () );

-- GIN trigram indexes for fast fuzzy matching CREATE INDEX idx_videos_title_trgm ON videos USING GIN ( title gin_trgm_ops ); CREATE INDEX idx_videos_channel_trgm ON videos USING GIN ( channel_title gin_trgm_ops );

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Region-Weighted Autocomplete

The unique challenge for a European video vault: a search should prefer…

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