51 lines
2.2 KiB
MySQL
51 lines
2.2 KiB
MySQL
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-- 55_relations_schema.sql
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-- Typed relations between entities. Replaces noisy co-mention with semantic
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-- edges like (Person, witnessed, Event), (Event, occurred_at, Location),
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-- (Person, signed, Document), etc.
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BEGIN;
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CREATE TABLE IF NOT EXISTS public.relations (
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relation_pk BIGSERIAL PRIMARY KEY,
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source_class TEXT NOT NULL,
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source_id TEXT NOT NULL,
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relation_type TEXT NOT NULL,
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target_class TEXT NOT NULL,
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target_id TEXT NOT NULL,
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evidence_ref TEXT, -- e.g. '[[doc-id/p007]]' or chunk_id
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confidence TEXT NOT NULL DEFAULT 'medium', -- high|medium|low
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extracted_by TEXT NOT NULL DEFAULT 'yaml', -- yaml|regex|llm|manual
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created_at TIMESTAMPTZ NOT NULL DEFAULT NOW(),
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UNIQUE (source_class, source_id, relation_type, target_class, target_id, evidence_ref)
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);
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-- Enum check on relation_type (extensible — add new values as we discover them)
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ALTER TABLE public.relations
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ADD CONSTRAINT relations_type_check
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CHECK (relation_type IN (
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'witnessed', -- (person, witnessed, event)
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'occurred_at', -- (event, occurred_at, location)
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'involves_uap', -- (event, involves_uap, uap_object)
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'documented_in', -- (event, documented_in, document)
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'authored', -- (person, authored, document)
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'signed', -- (person, signed, document)
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'mentioned_by', -- (person, mentioned_by, document)
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'employed_by', -- (person, employed_by, organization)
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'operated_by', -- (operation, operated_by, organization)
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'investigated', -- (person, investigated, event)
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'commanded', -- (person, commanded, organization)
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'related_to', -- generic fallback (lower-quality)
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'similar_to', -- (event, similar_to, event)
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'precedes', -- (event, precedes, event)
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'follows' -- (event, follows, event)
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));
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CREATE INDEX IF NOT EXISTS relations_source_idx
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ON public.relations (source_class, source_id);
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CREATE INDEX IF NOT EXISTS relations_target_idx
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ON public.relations (target_class, target_id);
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CREATE INDEX IF NOT EXISTS relations_type_idx
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ON public.relations (relation_type);
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COMMIT;
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