deep-dive

How Multica Full-Text Search Works: A Technical Deep Dive

April 11, 2026 multica-ai/multica ↗

Multica implements full-text search directly in the PostgreSQL layer using GIN indexes with the pg_bigm extension, processing queries through REST endpoints that dynamically generate parameterized SQL with relevance ranking and snippet extraction.

Multica is an open-source project management platform (multica-ai/multica) that delivers fast, CJK-friendly search across issues and projects without requiring external search engines like Elasticsearch. This guide examines how Multica full-text search operates by tracing the complete query lifecycle from HTTP request handling through PostgreSQL execution, including the specific ranking algorithms and indexing strategies defined in the source code

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{
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