通过Oracle函数SQL实现C# String.Format字符串格式化功能

分割函数CREATE OR REPLACE FUNCTION StringSplit ( SOURCE VARCHAR2, --信息内容 spliter VARCHAR2--分割符 ) RETURN stringarrary IS j INT := 0; i INT := 1; len INT := 0; len1 INT := 0; str VARCHAR2 (4000); returnvalue stringarrary := stringarrary (); BEGIN IF (spliter IS NULL) OR (SOURCE IS NULL) THEN returnvalue.EXTEND; returnvalue (1) := SOURCE; ELSE len := LENGTH (SOURCE); len1 := LENGTH (spliter); WHILE j < len LOOP j := INSTR (SOURCE, spliter, i); IF j = 0 THEN j := len; str := SUBSTR (SOURCE, i); returnvalue.EXTEND; returnvalue (returnvalue.COUNT) := str; IF i >= len THEN EXIT; END IF; ELSE str := SUBSTR (SOURCE, i, j - i); i := j + len1; returnvalue.EXTEND; returnvalue (returnvalue.COUNT) := str; END IF; END LOOP; END IF; RETURN returnvalue; END stringsplit;  1 CREATE OR REPLACE FUNCTION stringsplit (SOURCE VARCHAR2, spliter VARCHAR2)
 2    RETURN stringarrary
 3 IS
 4    j             INT             := 0;
 5    i             INT             := 1;
 6    len           INT             := 0;
 7    len1          INT             := 0;
 8    str           VARCHAR2 (4000);
 9    returnvalue   stringarrary    := stringarrary ();
10 BEGIN
11    IF (spliter IS NULL) OR (SOURCE IS NULL)
12    THEN
13       returnvalue.EXTEND;
14       returnvalue (1) := SOURCE;
15    ELSE
16       len := LENGTH (SOURCE);
17       len1 := LENGTH (spliter);
18 
19       WHILE j < len
20       LOOP
21          j := INSTR (SOURCE, spliter, i);
22 
23          IF j = 0
24          THEN
25             j := len;
26             str := SUBSTR (SOURCE, i);
27             returnvalue.EXTEND;
28             returnvalue (returnvalue.COUNT) := str;
29 
30             IF i >= len
31             THEN
32                EXIT;
33             END IF;
34          ELSE
35             str := SUBSTR (SOURCE, i, j - i);
36             i := j + len1;
37             returnvalue.EXTEND;
38             returnvalue (returnvalue.COUNT) := str;
39          END IF;
40       END LOOP;
41    END IF;
42 
43    RETURN returnvalue;
44 END stringsplit;    

      1.分割函数测试如下：      

 SELECT *
   FROM TABLE (CAST (StringSplit (‘1|12|123|1234||12345|‘, ‘|‘) AS stringarrary));

        结果：    

               COLUMN_VALUE
               1
               12
               123
               1234
    
               12345

        OK。

然后封装函数StringFormat：

CREATE OR REPLACE FUNCTION StringFormat (SOURCE     VARCHAR2,
                                          param      VARCHAR2,
                                          spliter    VARCHAR2)
   RETURN VARCHAR2
IS
   i             INT := 0;
   len           INT := 0;
   params        stringarrary := stringarrary ();
   returnvalue   VARCHAR2 (4000);
BEGIN
   params := stringsplit (param, spliter);

   IF params.COUNT > 0
   THEN
      len := params.COUNT;
      returnvalue := SOURCE;

      WHILE i < len
      LOOP
         returnvalue :=
            REPLACE (returnvalue,
                     CONCAT (CONCAT (‘{‘, TO_CHAR (i)), ‘}‘),
                     params (i + 1));
         i := i + 1;
      END LOOP;
   END IF;

   RETURN returnvalue;
END stringreplace;

1 CREATE OR REPLACE FUNCTION stringreplace (
2 SOURCE VARCHAR2,
3 param VARCHAR2,
4 spliter VARCHAR2
5 )
6 RETURN VARCHAR2
7 IS
8 i INT := 0;
9 len INT := 0;
10 params stringarrary := stringarrary ();
11 returnvalue VARCHAR2 (4000);
12 BEGIN
13 params := stringsplit (param, spliter);
14 
15 IF params.COUNT > 0
16 THEN
17 len := params.COUNT;
18 returnvalue := SOURCE;
19 
20 WHILE i < len
21 LOOP
22 returnvalue :=
23 REPLACE (returnvalue,
24 CONCAT (CONCAT (‘{‘, TO_CHAR (i)), ‘}‘),
25 params (i + 1)
26 );
27 i := i + 1;
28 END LOOP;
29 END IF;
30 
31 RETURN returnvalue;
32 END stringreplace;        2.测试Oracle---StringFormat函数了。

SELECT StringFormat(‘条码{0}当前工站在{1}！‘, ‘123456|FCT‘, ‘|‘) FROM DUAL;

1 select stringreplace(‘{0}+{1}={0}{1}‘,‘吱吱|YY‘,‘|‘) from dual;

        测试结果：

          条码123456当前工站在FCT！ 

通过Oracle函数SQL实现C# String.Format字符串格式化功能

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