BEGIN;

ALTER TABLE public.report_customer_config
    ALTER COLUMN theme TYPE VARCHAR(40);

ALTER TABLE public.report_customer_config
    DROP CONSTRAINT IF EXISTS report_customer_config_theme_check;

DO $$
BEGIN
    IF NOT EXISTS (
        SELECT 1
        FROM pg_constraint
        WHERE conname = 'report_customer_config_theme_not_empty'
          AND conrelid = 'public.report_customer_config'::regclass
    ) THEN
        ALTER TABLE public.report_customer_config
            ADD CONSTRAINT report_customer_config_theme_not_empty
            CHECK (length(trim(theme)) > 0) NOT VALID;
    END IF;
END;
$$;

ALTER TABLE public.report_customer_config
    VALIDATE CONSTRAINT report_customer_config_theme_not_empty;

COMMIT;