您好我是Oracle新手,请帮我将以下SQL Server存储过程转换为Oracle存储过程。
下面显示了我尝试转换为Oracle的SQL Server存储过程,但由于时间不长,我无法找到解决方案,请帮助我。
Create PROCEDURE dbo.myprocedure
@name VarChar(50),
@columnid VarChar(50),
@max Int OUTPUT
AS
DECLARE @period int,
@myStatement varChar(255)
SET @period = 99999
SET @max = 0
Create Table #newtable
(
valu INT
)
SET @myStatement = 'Insert INTO #newtable(valu) SELECT max( ' + @columnid + ') FROM ' + @name + ' WHERE ' +
@columnid+ ' <= ' + Convert(varChar(5), @period)
EXEC ( @myStatement )
SELECT @max = valu FROM #newtable
IF (@max = @period)
SET @max =-1
ELSE
SET @max= @max+ 1
DROP Table #newtable
GO
这就是我改变为oracle存储过程的方式
Create Table newtable( valu INT );
CREATE OR REPLACE
PROCEDURE PROCEDURE1
( name IN VARCHAR2
, columnid IN VARCHAR2
, maxid IN OUT VARCHAR2
)
as
period number;
mystatement varChar(255);
BEGIN
period:= 99999;
maxid:= 0;
mystatement:= 'Insert INTO newtable(valu) SELECT max(columnid) FROM name WHERE columnid <= Convert(varChar(5), period)';
SELECT maxid = valu FROM newtable;
EXECUTE immediate mystatement;
IF (maxid= period)
return maxid:=-1;
ELSE
return maxid:= maxid + 1;
DROP Table newtable;
END PROCEDURE1;
答案 0 :(得分:3)
好吧,创建和删除表也应该是执行立即子句,过程不返回值等等。你真的应该考虑在Oracle中至少阅读有关PL / SQL和动态SQL的内容。 这是您在Oracle中的过程的示例,但我不知道为什么您会以这样复杂的方式执行这样一个简单的任务:
CREATE OR REPLACE PROCEDURE MyProcedure(p_name VarChar2,p_columnid VarChar2,p_max OUT NUMBER)
AUTHID CURRENT_USER IS
v_period NUMBER;
v_max NUMBER;
BEGIN
v_period := 99999;
v_max := 0;
EXECUTE IMMEDIATE 'Create Table newtable (valu NUMBER)';
EXECUTE IMMEDIATE 'Insert INTO newtable (valu) ((SELECT max(' || p_columnid || ') FROM ' || p_name || ' WHERE '
|| p_columnid || ' <= ' || TO_CHAR(v_period) || '))';
EXECUTE IMMEDIATE 'SELECT valu FROM newtable' INTO v_max;
IF (v_max = v_period) THEN
p_max := -1;
ELSE
p_max := v_max + 1;
END IF;
EXECUTE IMMEDIATE 'DROP Table newtable';
END MyProcedure;
调用它的一个例子:
DECLARE
v_tmp NUMBER;
v_table VARCHAR2(32);
v_column VARCHAR2(32);
BEGIN
v_table := 'SOME_TABLE';
v_column := 'SOME_COLUMN';
MyProcedure(v_table,v_column,v_tmp);
DBMS_OUTPUT.PUT_LINE(v_tmp);
END;