36 lines
1.7 KiB
SQL
Executable File
36 lines
1.7 KiB
SQL
Executable File
CREATE TABLE IF NOT EXISTS community.vocab_srs_item (
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id SERIAL PRIMARY KEY,
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user_id INTEGER NOT NULL REFERENCES community."user"(id) ON DELETE CASCADE,
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course_id INTEGER NOT NULL REFERENCES community.vocab_course(id) ON DELETE CASCADE,
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lesson_id INTEGER NULL REFERENCES community.vocab_course_lesson(id) ON DELETE SET NULL,
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item_key VARCHAR(80) NOT NULL,
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learning TEXT NOT NULL,
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reference TEXT NOT NULL,
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direction VARCHAR(8) NOT NULL DEFAULT 'BOTH',
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stage INTEGER NOT NULL DEFAULT 0,
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interval_days INTEGER NOT NULL DEFAULT 0,
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last_reviewed_at TIMESTAMP WITH TIME ZONE NULL,
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next_due_at TIMESTAMP WITH TIME ZONE NOT NULL DEFAULT NOW(),
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correct_count INTEGER NOT NULL DEFAULT 0,
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wrong_count INTEGER NOT NULL DEFAULT 0,
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lapse_count INTEGER NOT NULL DEFAULT 0,
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created_at TIMESTAMP WITH TIME ZONE NOT NULL DEFAULT NOW(),
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updated_at TIMESTAMP WITH TIME ZONE NOT NULL DEFAULT NOW(),
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CONSTRAINT vocab_srs_item_user_key_unique UNIQUE (user_id, item_key)
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);
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CREATE INDEX IF NOT EXISTS idx_vocab_srs_item_due
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ON community.vocab_srs_item (user_id, course_id, next_due_at);
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CREATE INDEX IF NOT EXISTS idx_vocab_srs_item_lesson
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ON community.vocab_srs_item (user_id, course_id, lesson_id);
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COMMENT ON TABLE community.vocab_srs_item IS
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'Nutzerbezogener SRS-Fortschritt pro Vokabel/Phrase aus Sprachkursen.';
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COMMENT ON COLUMN community.vocab_srs_item.item_key IS
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'Stabiler deterministischer Schlüssel aus Kurs, Lektion und normalisiertem Begriffspaar.';
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COMMENT ON COLUMN community.vocab_srs_item.stage IS
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'SRS-Stufe. Höhere Stufen bedeuten längere Wiederholungsintervalle.';
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COMMENT ON COLUMN community.vocab_srs_item.next_due_at IS
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'Zeitpunkt, zu dem das Item wieder fällig ist.';
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