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1、知识点：
1）ORACLE 一维数组或者多维数组 定义、初始化以及使用
2）ORACLE PIPELINED 的使用
3）ORACLE利用INSTR和SUBSTR的字符串操作函数，实现SPLIT函数方法
2、实例:
TYPE para_array IS TABLE OF varchar2(10000) INDEX BY BINARY_INTEGER; --一维字符数组
TYPE para_array_double IS TABLE OF para_array INDEX BY BINARY_INTEGER; --二维数组
--根据分隔符P_SEP 分割字符串P_LIST 返回数组 PARA_ARRAY
FUNCTION F_SPLIT_STR(P_LIST VARCHAR2, P_SEP VARCHAR2) RETURN PARA_ARRAY
PIPELINED IS
L_IDX PLS_INTEGER;
V_LIST VARCHAR2(50) := P_LIST;
BEGIN
LOOP
L_IDX := INSTR(V_LIST, P_SEP);
IF L_IDX > 0 THEN
PIPE ROW(SUBSTR(V_LIST, 1, L_IDX - 1));
V_LIST := SUBSTR(V_LIST, L_IDX + LENGTH(P_SEP));
ELSE
PIPE ROW(V_LIST);
EXIT;
END IF;
END LOOP;
RETURN;
END F_SPLIT_STR;
--对字符串以I_SPLIT 分隔符进行分割，返回一维数组para_array
FUNCTION F_GET_ARR(I_VALUE IN VARCHAR2,I_SPLIT IN VARCHAR2)
RETURN para_array IS
V_ARR para_array;
V_VALUE VARCHAR2(1000);
V_COUNT NUMBER;
V_NUM NUMBER;
CURSOR C_VALUE IS
SELECT *
FROM TABLE(F_SPLIT_STR(I_VALUE,
I_SPLIT));
BEGIN
V_ARR := para_array();
V_VALUE := '';
V_NUM := 1;
FOR V_CUR_VALUE IN C_VALUE LOOP
V_VALUE := V_CUR_VALUE.COLUMN_VALUE;
IF V_VALUE IS NOT NULL THEN
V_ARR.EXTEND();
V_ARR(V_NUM) := V_VALUE ;
V_NUM := V_NUM + 1 ;
END IF;
END LOOP;
RETURN V_ARR;
END F_GET_ARR;
--对多次分割的字符串进行分割操作，并返回二维数组para_array_double
FUNCTION F_GET_ARR_DOUBLE(I_VALUE_STR IN varchar2)
RETURN para_array_double IS
V_VALUE_STR_ARR para_array;
V_VALUE_ARR para_array;
V_VALUE_ARR_DOUBLE para_array_double;
V_VALUE VARCHAR2(1000);
V_NUM NUMBER;
BEGIN
V_VALUE_STR_ARR := para_array();
V_VALUE_ARR := para_array();
V_VALUE_STR_ARR := F_GET_BENF_INSURED_ARR(I_VALUE_STR,';');
for V_NUM IN 1..V_VALUE_STR_ARR.COUNT loop
V_VALUE_ARR := F_GET_ARR(V_VALUE_STR_ARR(V_NUM),',');
V_VALUE_ARR_DOUBLE(V_NUM) := V_VALUE_ARR;
end loop;
RETURN V_VALUE_ARR_DOUBLE;
END F_GET_ARR_DOUBLE;
--测试用例
PROCEDURE test_arr(I_TEST_STR IN VARCHAR2, O_MSG OUT VARCHAR2) IS
V_ARR_DOUBLE para_array_double;
BEGIN
V_ARR_DOUBLE := F_GET_ARR_DOUBLE(I_TEST_STR);
FOR I IN 1..V_ARR_DOUBLE.COUNT LOOP
FOR J IN 1..V_ARR_DOUBLE(I).COUNT LOOP
DBMS_OUTPUT.PUT_LINE(V_ARR_DOUBLE(I)(J));
END LOOP;
END LOOP;
O_MSG := 'TRUE';
END TEST_ARR;