r18514(仮)

ALTER TABLE dtb_order
    ALTER COLUMN order_pref TYPE SMALLINT
        USING CAST(order_pref AS SMALLINT)
;
ALTER TABLE dtb_order
    ALTER COLUMN deliv_pref TYPE SMALLINT
        USING CAST(deliv_pref AS SMALLINT)
;
ALTER TABLE dtb_order_temp
    ALTER COLUMN order_pref TYPE SMALLINT
        USING CAST(order_pref AS SMALLINT)
;
ALTER TABLE dtb_order_temp
    ALTER COLUMN deliv_pref TYPE SMALLINT
        USING CAST(deliv_pref AS SMALLINT)
;
ALTER TABLE dtb_other_deliv
    ALTER COLUMN pref TYPE SMALLINT
        USING CAST(pref AS SMALLINT)
;