Решение:
SELECT ROUTINE_NAME, ROUTINE_DEFINITION
FROM INFORMATION_SCHEMA.ROUTINES
WHERE ROUTINE_DEFINITION LIKE '%искомый текст%'
AND ROUTINE_TYPE='PROCEDURE'
Личный блог Фунтикова Виталия. Full stack developer
SELECT ROUTINE_NAME, ROUTINE_DEFINITION
FROM INFORMATION_SCHEMA.ROUTINES
WHERE ROUTINE_DEFINITION LIKE '%искомый текст%'
AND ROUTINE_TYPE='PROCEDURE'