CASE WHEN ('{isNomn}' = '0') THEN
SELECT * FROM (SELECT
	msus.snon_id,
	snon.art,
	snon.naim,
	msus.ost,
	msus.cena,
	msus.cenao,
        snonv.mfoto,
	msus.ost * msus.cenao AS summa,
	GROUP_CONCAT(CONCAT(smcur.naim, ': ', smcgr.naim) SEPARATOR '; ') AS cont_naim
FROM
	ms_msus AS msus
LEFT JOIN op_snon AS snon ON msus.snon_id = snon.id
LEFT JOIN op_snonv AS snonv ON snon.id = snonv.snon_id
LEFT JOIN ms_msusw as msusw ON (msusw.msus_id = msus.id)
LEFT JOIN ms_smcur AS smcur ON msusw.smcur_id = smcur.id
LEFT JOIN ms_smcgr AS smcgr ON msusw.smcgr_id = smcgr.id
WHERE 
msus.ost > 0
AND CASE WHEN ('{spzSID}' = '0') THEN 1=1 ELSE msus.spz_sid IN ({spzSID}) END
GROUP BY
	msus.id
ORDER BY snon.art
) as tmp
ELSE
SELECT * FROM (SELECT
	snon.id,
	snon.art,
	snon.naim,
	0 as ost,
	snon.cena,
	snon.cenao,
        snonv.mfoto,
	0 as summa,
	'' AS cont_naim
FROM
	op_snon AS snon
LEFT JOIN op_snonv AS snonv ON snon.id = snonv.snon_id
WHERE 
1=1
GROUP BY
	snon.id
ORDER BY snon.art
) as tmp
END

DELIMITER |
DROP PROCEDURE IF EXISTS `proc_get_price` |
CREATE PROCEDURE `proc_get_price` (nomn INT, spzid INT)
BEGIN 
	IF (nomn = 0) THEN 
		SELECT '1';
	ELSE 
		SELECT '2';
	END IF;
END; |
DELIMITER ;
CALL proc_get_price(0, 0);

CASE WHEN ('{spzSID}' = '0') THEN 1=1 ELSE msus.spz_sid IN ({spzSID}) END

('{spzSID}' = '0' OR msus.spz_sid IN ({spzSID}))