字符串分隔函数及应用

CREATE OR REPLACE FUNCTION "SPLIT" (p_str       IN VARCHAR2,
                                           p_delimiter IN VARCHAR2)
  RETURN tbl_split IS
  j         INT := 0;
  i         INT := 1;
  len       INT := 0;
  len1      INT := 0;
  str       VARCHAR2(4000);
  str_split tbl_split := tbl_split();
BEGIN
  IF p_delimiter is not null THEN
    len  := LENGTH(p_str);
    len1 := LENGTH(p_delimiter);
    WHILE j < len LOOP
      j := INSTR(p_str, p_delimiter, i);

      IF j = 0 THEN
        j   := len;
        str := SUBSTR(p_str, i);
        str_split.EXTEND;
        str_split(str_split.COUNT) := str;

        IF i >= len THEN
          EXIT;
        END IF;
      ELSE
        str := SUBSTR(p_str, i, j - i);
        i   := j + len1;
        str_split.EXTEND;
        str_split(str_split.COUNT) := str;
      END IF;
    END LOOP;
  ELSE
    len := LENGTH(p_str);
    j   := 1;
    WHILE (p_str is not null and j <= len ) LOOP
      str := substrb(p_str, j, 1);
      str_split.EXTEND;
      str_split(str_split.COUNT) := str;
      j := j + 1;
      /*
      IF j >= len THEN
        EXIT;
      END IF;
      */
    END LOOP;
  END IF;
  RETURN str_split;
END split;
 

------------------------------------------------------------------------------------------------------

WITH TMP_A AS(
     SELECT 1 ID,'A,B,C,D' NAME FROM DUAL
     UNION ALL
     SELECT 1 ID,'E,F,G,H' NAME FROM DUAL
     UNION ALL
     SELECT 1 ID,'I,J,K' NAME FROM DUAL
     UNION ALL
     SELECT 2 ID,'Z,X,C' NAME FROM DUAL
     UNION ALL
     SELECT 2 ID,'E,F,G,H' NAME FROM DUAL
),TMP_B AS (
     SELECT ID,EA_OFMS.SPLIT(NAME,',') COL ,NAME
     FROM TMP_A
)SELECT TMP_B.*,TMP_C.*
FROM TMP_B,TABLE(TMP_B.COL) TMP_C

 

QQ截图20120515135504.jpg

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转载于:http://blog.itpub.net/26892340/viewspace-723598/