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perf: add GIN indexes for pg_trgm fuzzy search optimization

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Add GIN indexes with gin_trgm_ops for text fields used in fuzzy search:
- author, title, series, genre, language fields

These indexes significantly improve performance of word_similarity()
queries used in the unified search implementation. pg_trgm extension
must already be enabled for these indexes to function.

Performance impact: O(n) sequential scans become O(log n) index scans
for fuzzy text search operations.
This commit is contained in:
john-okeefe
2026-03-22 20:35:01 -04:00
parent aa7776db5f
commit 7b49ab253f
1 changed files with 12 additions and 0 deletions
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database/schema/schema.sql
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@@ -145,6 +145,18 @@ ALTER TABLE media_items ADD COLUMN IF NOT EXISTS contributors_search TEXT[];
CREATE INDEX IF NOT EXISTS idx_media_items_tags_search ON media_items USING GIN (tags_search);
CREATE INDEX IF NOT EXISTS idx_media_items_contributors_search ON media_items USING GIN (contributors_search);
-- Add GIN indexes for pg_trgm fuzzy search performance
CREATE INDEX IF NOT EXISTS idx_media_items_author_trgm
ON media_items USING GIN (author gin_trgm_ops);
CREATE INDEX IF NOT EXISTS idx_media_items_title_trgm
ON media_items USING GIN (title gin_trgm_ops);
CREATE INDEX IF NOT EXISTS idx_media_items_series_trgm
ON media_items USING GIN (series gin_trgm_ops);
CREATE INDEX IF NOT EXISTS idx_media_items_genre_trgm
ON media_items USING GIN (genre gin_trgm_ops);
CREATE INDEX IF NOT EXISTS idx_media_items_language_trgm
ON media_items USING GIN (language gin_trgm_ops);
-- Create reading_progress table
CREATE TABLE IF NOT EXISTS reading_progress (
id UUID PRIMARY KEY DEFAULT gen_random_uuid(),