Ilker ManapandClaude Opus 5
f2f375d824
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The choice is unchanged and now better argued: a deployment does not announce which language its notes are in, so any stemmer picked here is the wrong one somewhere — and applying the wrong one does not fail loudly, it quietly stops finding things. Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
45 lines
2.2 KiB
SQL
45 lines
2.2 KiB
SQL
-- Ported from the SQLite migration of the same number, and the only one that
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-- is not a mechanical translation.
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--
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-- SQLite gets full-text search from an FTS5 virtual table with an external
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-- content table and three triggers keeping it in step. PostgreSQL derives a
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-- tsvector from the row itself, so there is nothing to keep in step and no
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-- trigger to forget: the column cannot disagree with the row it is computed
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-- from.
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--
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-- The search query differs too, and that difference lives in the Go code
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-- rather than being hidden here — a query that means "match these words" is
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-- spelled MATCH in one and @@ in the other, and pretending otherwise would
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-- cost more than admitting it.
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ALTER TABLE projects ADD COLUMN memory_retention_hours BIGINT;
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CREATE TABLE memory_notes (
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id BIGINT GENERATED ALWAYS AS IDENTITY PRIMARY KEY,
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-- Scoped to a project and checked in SQL on every read, like threads.
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project_id TEXT NOT NULL REFERENCES projects(id) ON DELETE CASCADE,
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-- A namespace inside the project, so two agents sharing a key do not read
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-- each other's notes.
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agent_id TEXT NOT NULL,
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key TEXT NOT NULL,
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text TEXT NOT NULL,
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-- Normalised to ",a,b," so a tag matches whole, never as part of another.
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tags TEXT NOT NULL DEFAULT '',
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created_at BIGINT NOT NULL,
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-- Touched on every write, so retention measures how long a note has gone
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-- unrefreshed rather than how old it is.
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updated_at BIGINT NOT NULL,
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-- 'simple' rather than a language configuration. These are an agent's own
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-- notes, in whatever language it chose, and a deployment does not announce
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-- which that is — so any stemmer picked here is the wrong one somewhere.
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-- Applying English rules to text that is not English does not fail loudly:
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-- it quietly stops finding things, which is the worst way for a search to
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-- be wrong.
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search tsvector GENERATED ALWAYS AS (
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to_tsvector('simple', coalesce(key, '') || ' ' || coalesce(text, '') || ' ' || coalesce(tags, ''))
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) STORED,
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UNIQUE (project_id, agent_id, key)
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);
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CREATE INDEX memory_notes_by_updated ON memory_notes(updated_at);
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CREATE INDEX memory_notes_search ON memory_notes USING GIN (search);
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