7950X B650 에서 테스트 하였습니다
SELECT COUNT(DISTINCT `wr_parent`) AS `cnt` FROM g4_write_bmt WHERE ((INSTR(wr_subject, '그�0�0�픽카�0�')>0 or INSTR(wr_content, '그�0�0�픽카�0�')>0) )
Illegal mix of collations (utf8mb3_general_ci,IMPLICIT) and (euckr_korean_ci,COERCIBLE) for operation 'locate' : 1267