Pl / SQL:如何对记录表进行排序?

时间:2009-11-11 13:30:25

标签: oracle sorting collections plsql

我是pl / sql的新手! 我正在尝试使用简单的冒泡排序算法对记录表进行排序。有什么问题?

我在哪里可以找到有关使用记录表的更多信息?

DECLARE
    text VARCHAR2(50);
TYPE TIP_VECTOR
IS
    TABLE OF INT INDEX BY BINARY_INTEGER;
TYPE contorRecord
IS
    record
    (
        codASCII VARCHAR2(3),
        contor   SMALLINT);
TYpe tip_vector2
IS
    TABLE OF contorRecord;
    VECTOR TIP_VECTOR;
    VECTOR2 TIP_VECTOR2 := TIP_VECTOR2();
  aux tip_vector2 := tip_vector2();
    v_char VARCHAR2(3);
    FLAG   BOOLEAN := TRUE;
    t smallint;
    n      SMALLINT := 1;
    ind    SMALLINT := 0;

begin
        AUX.EXTEND(1);
            WHILE(FLAG)
                    LOOP
                    FLAG  := FALSE;
    -- here is the problem; what i'm doing wrong?
                    FOR I IN 1..(vector2.count-1) LOOP 
    -- here is the problem; what i'm doing wrong?
                    IF VECTOR2(I).CONTOR  < VECTOR2(I+1).contor THEN
                    AUX         := VECTOR(I+1);
                    VECTOR(i+1) := VECTOR(I);
                    VECTOR(I)   := AUX;
                    FLAG        := TRUE;
                    END IF;
                    END LOOP;
                    END LOOP;
end;

错误:

Error report:

PLS-00382: expression is of wrong type

PL/SQL: Statement ignored

PLS-00382: expression is of wrong type

PL/SQL: Statement ignored
06550. 00000 -  "line %s, column %s:\n%s"
*Cause:    Usually a PL/SQL compilation error.
*Action:

3 个答案:

答案 0 :(得分:4)

答案 1 :(得分:3)

也许这不是你真正需要的方式。通常,您可以从PL / SQL代码中使用SQL中受益 - 在SQL中,您只需按结果排序即可。你试图解决的问题是什么?

有关PL / SQL集合的信息,请访问:PL/SQL Language Reference

答案 2 :(得分:2)

你的类型和变量混在一起。尝试:

DECLARE
    TYPE contorRecord IS record ( codASCII VARCHAR2(3), contor   SMALLINT);
    TYpe tip_vector2 IS TABLE OF contorRecord;
    VECTOR2 TIP_VECTOR2 := TIP_VECTOR2();
    aux contorRecord;
    FLAG   BOOLEAN := TRUE;
begin
    WHILE(FLAG)
    LOOP
        FLAG  := FALSE;
        FOR I IN 1..(vector2.count-1) LOOP
            IF VECTOR2(I).CONTOR  < VECTOR2(I+1).contor THEN
                AUX         := VECTOR2(I+1);
                VECTOR2(i+1) := VECTOR2(I);
                VECTOR2(I)   := AUX;
                FLAG        := TRUE;
            END IF;
        END LOOP;
    END LOOP;
end;
/

(通过删除所有未使用的类型和变量进行整理)