Can you check this SQL request? This was made for material view in DB (using gem 'scenic'). I want to know what could go wrong, what risks hidden here?

SQL for material view.

SELECT
    payroll_reports.employee_work_period_id,

    (select sum(a.regular_hours) from payroll_reports a where a.salary_type = '1' and a.employee_work_period_id = payroll_reports.employee_work_period_id) as hourly_regular_hours,
    (select sum(a.regular_gross_amount_cents) from payroll_reports a where a.salary_type = '1' and a.employee_work_period_id = payroll_reports.employee_work_period_id) as hourly_regular_gross_amount_cents,
    (select sum(a.ytd_regular_hours) from payroll_reports a where a.salary_type = '1' and a.employee_work_period_id = payroll_reports.employee_work_period_id) as hourly_ytd_regular_hours,
    (select sum(a.ytd_regular_gross_amount_cents) from payroll_reports a where a.salary_type = '1' and a.employee_work_period_id = payroll_reports.employee_work_period_id) as hourly_ytd_regular_gross_amount_cents,

    (select sum(a.overtime_hours) from payroll_reports a where a.salary_type = '1' and a.employee_work_period_id = payroll_reports.employee_work_period_id) as hourly_overtime_hours,
    (select sum(a.overtime_gross_amount_cents) from payroll_reports a where a.salary_type = '1' and a.employee_work_period_id = payroll_reports.employee_work_period_id) as hourly_overtime_gross_amount_cents,
    (select sum(a.ytd_overtime_hours) from payroll_reports a where a.salary_type = '1' and a.employee_work_period_id = payroll_reports.employee_work_period_id) as hourly_ytd_overtime_hours,
    (select sum(a.ytd_overtime_gross_amount_cents) from payroll_reports a where a.salary_type = '1' and a.employee_work_period_id = payroll_reports.employee_work_period_id) as hourly_ytd_overtime_gross_amount_cents,

    (select sum(a.regular_hours) from payroll_reports a where a.salary_type = '2' and a.employee_work_period_id = payroll_reports.employee_work_period_id) as salary_regular_hours,
    (select sum(a.regular_gross_amount_cents) from payroll_reports a where a.salary_type = '2' and a.employee_work_period_id = payroll_reports.employee_work_period_id) as salary_regular_gross_amount_cents,
    (select sum(a.ytd_regular_hours) from payroll_reports a where a.salary_type = '2' and a.employee_work_period_id = payroll_reports.employee_work_period_id) as salary_ytd_regular_hours,
    (select sum(a.ytd_regular_gross_amount_cents) from payroll_reports a where a.salary_type = '2' and a.employee_work_period_id = payroll_reports.employee_work_period_id) as salary_ytd_regular_gross_amount_cents,

    (select sum(a.paid_phone_price_cents) from payroll_reports a where a.employee_work_period_id = payroll_reports.employee_work_period_id) as paid_phone_price_cents,
    (select sum(a.total_net_amount_cents) from payroll_reports a where a.employee_work_period_id = payroll_reports.employee_work_period_id) as total_net_amount_cents,

    (select sum(a.total_hours) from payroll_reports a where a.employee_work_period_id = payroll_reports.employee_work_period_id) as total_hours,
    (select sum(a.total_gross_amount_cents) from payroll_reports a where a.employee_work_period_id = payroll_reports.employee_work_period_id) as total_gross_amount_cents,
    (select sum(a.ytd_total_hours) from payroll_reports a where a.employee_work_period_id = payroll_reports.employee_work_period_id) as ytd_total_hours,
    (select sum(a.ytd_total_gross_amount_cents) from payroll_reports a where a.employee_work_period_id = payroll_reports.employee_work_period_id) as ytd_total_gross_amount_cents,

    json_agg(DISTINCT
             (SELECT x FROM (SELECT
                                 payroll_reports.id,
                                 payroll_reports.employee_id,
                                 payroll_reports.salary_type,
                                 (
                                     SELECT first_name
                                     FROM employees
                                     WHERE id = payroll_reports.employee_id),
                                 (
                                     SELECT last_name
                                     FROM employees
                                     WHERE id = payroll_reports.employee_id)
                            ) AS x)
        ) as payroll_reports,

    json_agg(DISTINCT
             (SELECT x FROM (SELECT
                                 payroll_salary_changes.amount_cents,
                                 payroll_salary_changes.ytd_amount_cents,
                                 payroll_salary_changes.paid_amount_cents,
                                 (
                                     SELECT name
                                     FROM payroll_salary_change_reasons
                                     WHERE id = payroll_salary_changes.payroll_salary_change_reason_id)
                             WHERE payroll_salary_changes.salary_changeable_id = payroll_reports.id and payroll_salary_changes.salary_changeable_type = 'PayrollReport'
                            ) AS x)
        ) as deductions,


    json_agg(DISTINCT
             (SELECT x FROM (SELECT
                                 payroll_report_states.total_gross_amount_cents,
                                 payroll_report_states.total_tax_amount_cents,
                                 payroll_report_states.ytd_total_gross_amount_cents,
                                 payroll_report_states.ytd_total_tax_amount_cents,
                                 payroll_report_states.regular_hours,
                                 payroll_report_states.overtime_hours,
                                 payroll_report_states.total_hours,
                                 payroll_report_states.state_id,
                                 (
                                     SELECT name
                                     FROM states
                                     WHERE id = payroll_report_states.state_id)
                             WHERE payroll_report_states.payroll_report_id = payroll_reports.id
                            ) AS x)
        ) as payroll_report_states,

    json_agg(DISTINCT
             (SELECT x FROM (SELECT
                                 payroll_report_state_add_ons.total_gross_amount_cents,
                                 payroll_report_state_add_ons.total_tax_amount_cents,
                                 payroll_report_state_add_ons.ytd_total_gross_amount_cents,
                                 payroll_report_state_add_ons.ytd_total_tax_amount_cents,
                                 payroll_report_state_add_ons.payroll_tax_setup_add_on_id,
                                 (
                                     SELECT name
                                     FROM payroll_tax_setup_add_ons
                                     WHERE id = payroll_report_state_add_ons.payroll_tax_setup_add_on_id)
                             WHERE payroll_report_state_add_ons.payroll_report_id = payroll_reports.id
                            ) AS x)
        ) as payroll_report_state_add_ons,

    json_agg(
            json_build_object( 'id', (SELECT emergency_services.id),
                               'data',
                               json_build_object( 'amount',
                                                  (
                                                      SELECT emergency_services.amount_cents
                                                      WHERE emergency_services.payroll_report_id = payroll_reports.id
                                                  ), 'regular_hours',
                                                  (
                                                      SELECT DISTINCT extract( epoch from emergency_services.end_at - emergency_services.start_at)
                                                      WHERE emergency_services.payroll_report_id = payroll_reports.id
                                                  )
                                   ))
        ) as emergency_services

FROM "payroll_reports"
         INNER JOIN "employees" ON "employees"."id" = "payroll_reports"."employee_id"
         INNER JOIN "employment_histories" ON "employment_histories"."employee_id" = "employees"."id"

         LEFT OUTER JOIN LATERAL(
    SELECT DISTINCT id, amount_cents, ytd_amount_cents, paid_amount_cents, payroll_salary_change_reason_id, salary_changeable_id, salary_changeable_type
    FROM "payroll_salary_changes"
    WHERE "payroll_salary_changes"."salary_changeable_id" = "payroll_reports"."id" AND "payroll_salary_changes"."salary_changeable_type" = 'PayrollReport'
    GROUP BY id, salary_changeable_id
    ) as payroll_salary_changes ON TRUE

         LEFT OUTER JOIN LATERAL(
    SELECT DISTINCT id, amount_cents, payroll_report_id, start_at, end_at FROM "emergency_services"
    WHERE "emergency_services"."payroll_report_id" = "payroll_reports"."id"
    GROUP BY id, salary_changeable_id
    ) as emergency_services ON TRUE

         LEFT OUTER JOIN LATERAL(
    SELECT DISTINCT id, regular_hours, overtime_hours, total_hours, total_gross_amount_cents, total_tax_amount_cents, ytd_total_gross_amount_cents, ytd_total_tax_amount_cents, state_id, payroll_report_id FROM "payroll_report_states"
    WHERE "payroll_report_states"."payroll_report_id" = "payroll_reports"."id"
    GROUP BY id, payroll_report_id
    ) as payroll_report_states ON TRUE

         LEFT OUTER JOIN LATERAL(
    SELECT DISTINCT id, total_gross_amount_cents, total_tax_amount_cents, ytd_total_gross_amount_cents, ytd_total_tax_amount_cents, payroll_tax_setup_add_on_id, payroll_report_id FROM "payroll_report_state_add_ons"
    WHERE "payroll_report_state_add_ons"."payroll_report_id" = "payroll_reports"."id"
    GROUP BY id, payroll_report_id
    ) as payroll_report_state_add_ons ON TRUE

WHERE "employees"."status" = '0' AND (employees.hide_from_payroll IS false AND (employment_histories.termination_date IS NULL))

GROUP BY payroll_reports.employee_work_period_id
ORDER BY employee_work_period_id DESC