-- Support application logs that span multiple lawn sections.

CREATE TABLE IF NOT EXISTS application_log_sections (
    id SERIAL PRIMARY KEY,
    log_id INTEGER NOT NULL REFERENCES application_logs(id) ON DELETE CASCADE,
    lawn_section_id INTEGER NOT NULL REFERENCES lawn_sections(id) ON DELETE CASCADE,
    created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
    UNIQUE(log_id, lawn_section_id)
);

INSERT INTO application_log_sections (log_id, lawn_section_id)
SELECT al.id, al.lawn_section_id
FROM application_logs al
WHERE al.lawn_section_id IS NOT NULL
ON CONFLICT (log_id, lawn_section_id) DO NOTHING;

CREATE INDEX IF NOT EXISTS idx_application_log_sections_log_id
  ON application_log_sections(log_id);

CREATE INDEX IF NOT EXISTS idx_application_log_sections_section_id
  ON application_log_sections(lawn_section_id);