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-- copies of the Software, and to permit persons to whom the Software is
-- furnished to do so, subject to the following conditions:
--
-- The above copyright notice and this permission notice shall be included in
-- all copies or substantial portions of the Software.
--
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-- IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
-- FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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-- SOFTWARE.

DELETE FROM processing_activity_data_protection_impact_assessments
WHERE id IN (
    SELECT id
    FROM (
        SELECT id,
               ROW_NUMBER() OVER (
                   PARTITION BY processing_activity_id, COALESCE(snapshot_id, '')
                   ORDER BY updated_at DESC
               ) AS rn
        FROM processing_activity_data_protection_impact_assessments
    ) t
    WHERE rn > 1
);

DELETE FROM processing_activity_transfer_impact_assessments
WHERE id IN (
    SELECT id
    FROM (
        SELECT id,
               ROW_NUMBER() OVER (
                   PARTITION BY processing_activity_id, COALESCE(snapshot_id, '')
                   ORDER BY updated_at DESC
               ) AS rn
        FROM processing_activity_transfer_impact_assessments
    ) t
    WHERE rn > 1
);

CREATE UNIQUE INDEX processing_activity_dpias_processing_activity_id_snapshot_id_uniq
    ON processing_activity_data_protection_impact_assessments (processing_activity_id, COALESCE(snapshot_id, ''));

CREATE UNIQUE INDEX processing_activity_tias_processing_activity_id_snapshot_id_uniq
    ON processing_activity_transfer_impact_assessments (processing_activity_id, COALESCE(snapshot_id, ''));