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Mysql 자음 초성 추출 함수, 자음으로 검색, 초성 검색

함수를 만들어서 추출해보자. 

CREATE DEFINER=`gn`@`%` FUNCTION `fn_choSearch`(`str` varchar(20)) RETURNS varchar(20) CHARSET utf8 
 
BEGIN 
     declare returnStr varchar(100); 
     declare cnt int; 
     declare i int; 
     declare j int; 
     declare tmpStr varchar(10); 
 
     if str is null then 
         return ''; 
     end if; 
 
     set cnt = length(str)/3; 
     set i = 1; 
     set j = 1; 
 
     while i <=cnt DO 
           set tmpStr = substring(str,i,j); 
           set returnStr = concat(ifnull(returnStr,''), 
 
            case when tmpStr rlike '^(ㄱ|ㄲ)' OR ( tmpStr >= '가' AND tmpStr < '나' ) then 'ㄱ' 
                 when tmpStr rlike '^ㄴ' OR ( tmpStr >= '나' AND tmpStr < '다' ) then 'ㄴ' 
                 when tmpStr rlike '^(ㄷ|ㄸ)' OR ( tmpStr >= '다' AND tmpStr < '라' ) then 'ㄷ' 
                 when tmpStr rlike '^ㄹ' OR ( tmpStr >= '라' AND tmpStr < '마' ) then 'ㄹ' 
                 when tmpStr rlike '^ㅁ' OR ( tmpStr >= '마' AND tmpStr < '바' ) then 'ㅁ' 
                 when tmpStr rlike '^ㅂ' OR ( tmpStr >= '바' AND tmpStr < '사' ) then 'ㅂ' 
                 when tmpStr rlike '^(ㅅ|ㅆ)' OR ( tmpStr >= '사' AND tmpStr < '아' ) then 'ㅅ' 
                 when tmpStr rlike '^ㅇ' OR ( tmpStr >= '아' AND tmpStr < '자' ) then 'ㅇ' 
                 when tmpStr rlike '^(ㅈ|ㅉ)' OR ( tmpStr >= '자' AND tmpStr < '차' ) then 'ㅈ' 
                 when tmpStr rlike '^ㅊ' OR ( tmpStr >= '차' AND tmpStr < '카' ) then 'ㅊ' 
                 when tmpStr rlike '^ㅋ' OR ( tmpStr >= '카' AND tmpStr < '타' ) then 'ㅋ' 
                 when tmpStr rlike '^ㅌ' OR ( tmpStr >= '타' AND tmpStr < '파' ) then 'ㅌ' 
                 when tmpStr rlike '^ㅍ' OR ( tmpStr >= '파' AND tmpStr < '하' ) then 'ㅍ' 
            else 'ㅎ' end); 
           set i=i+1; 
     end while; 
  RETURN returnStr; 
END;

 

자바스크립트로 검색어가 초성인지 아닌지 체크

var keyword = $("#keyword").val().toUpperCase(); 
var choKeyword = choHangul($("#keyword").val()); 
 
//초성검색 구분 
 
if (keyword!="" && choKeyword==""){ 
    choDiv = 'Y'; 
}else{ 
    choDiv = 'N'; 
} 

/* 초성추출 */ 
function choHangul(str) { 
  cho = ["ㄱ","ㄲ","ㄴ","ㄷ","ㄸ","ㄹ","ㅁ","ㅂ","ㅃ","ㅅ","ㅆ","ㅇ","ㅈ","ㅉ","ㅊ","ㅋ","ㅌ","ㅍ","ㅎ"]; 
  result = ""; 
  for(i=0;i<str.length;i++) { 
      code = str.charCodeAt(i)-44032; 
    if(code>-1 && code<11172) result += cho[Math.floor(code/588)]; 
  } 
  return result; 
} 

쿼리에서 초성 추출하자.

WHERE 1=1 
<isEqual prepend='AND' property="choDiv" compareValue="N" > 
    S1.STOP_NAME LIKE concat('%',#keyword#,'%') OR S1.STOP_ID LIKE concat('%',#keyword#,'%') 
</isEqual> 
<isEqual prepend='AND' property="choDiv" compareValue="Y" > 
    fn_choSearch(S1.stop_name) LIKE concat('%',#keyword#,'%') OR S1.STOP_ID LIKE concat('%',#keyword#,'%') 
</isEqual> 

 

choDiv 값이 N 일 경우 일반검색
choDiv 값이 Y 일 경우 위의 oracle함수를 사용하여 초성검색


예를 들어
이렇게 구현을 하면 'ㄱㄴㄷ' 으로 검색을 하면
가나다
간난단
갇낟닫
...
등 초성이 ㄱ,ㄴ,ㄷ 인 데이터가 검색된다.

출처 : https://aljjabaegi.tistory.com/220