PL SQL 中多个参数的逗号分隔查询

Posted 2023-03-28

【中文标题】PL SQL 中多个参数的逗号分隔查询

【英文标题】：Comma Seperated Query for Multiple Parametes in PLSQL

【发布时间】：2015-10-15 14:58:23

【问题描述】：

到目前为止，我可以参考Query with comma seperated IN parameters in PLSQL 在 PLSQL 中查询逗号分隔的 IN 参数。并且工作完美。我的问题是如何为至少 3 个逗号分隔的参数实现相同的解决方案。我的查询参数是这样的，

I_PRODUCT query (R%, L%)
I_MODEL query (E%,T%,R%)
I_TYPE query (A5,B%,C%)

作为一个函数并调用所有这些参数是否很好？还有其他快速解决方案吗？

create or replace PROCEDURE RQUERY1
(
 I_PRODUCT VARCHAR2
 I_MODEL VARCHAR2
 I_TYPE VARCHAR2
, O_Cursor OUT SYS_REFCURSOR

) AS BEGIN
O_Cursor := NULL;

OPEN O_Cursor FOR
WITH PROD_SEARCH AS
(
     select regexp_substr(I_PRODUCT,'[^,]+', 1, level) pattern from dual
     connect by regexp_substr(I_PRODUCT, '[^,]+', 1, level) is not null
)
SELECT * FROM table1
  WHERE EXISTS (SELECT NULL FROM PROD_SEARCH WHERE table1.PRODUCT LIKE pattern );
END RQUERY1 ;

更新：我希望使用存储过程从我的 java 代码中查询参数（I_PRODUCT、I_MODEL、I_TYPE），并且需要显示输出值。

【参考方案1】：

使用集合：

CREATE OR REPLACE PROCEDURE RQUERY1
(
 I_PRODUCT IN  SYS.ODCIVARCHAR2LIST,
 I_MODEL   IN  SYS.ODCIVARCHAR2LIST,
 I_TYPE    IN  SYS.ODCIVARCHAR2LIST,
 O_Cursor  OUT SYS_REFCURSOR
)
AS
BEGIN
  OPEN O_Cursor FOR
  SELECT t.*
  FROM   table1 t
         INNER JOIN TABLE( I_PRODUCT ) p ON t.PRODUCT = p.COLUMN_VALUE
         INNER JOIN TABLE( I_MODEL   ) m ON t.MODEL   = m.COLUMN_VALUE
         INNER JOIN TABLE( I_TYPE    ) y ON t.TYPE    = y.COLUMN_VALUE;
END RQUERY1;
/

然后你可以像这样在Java中调用它：

import java.sql.CallableStatement;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.ResultSet;
import java.sql.SQLException;
import oracle.jdbc.OracleCallableStatement;
import oracle.jdbc.internal.OracleTypes;
import oracle.sql.ARRAY;
import oracle.sql.ArrayDescriptor; 

public class TestDatabase 
    public static void main(String args[])
        try

            Class.forName("oracle.jdbc.OracleDriver");

            Connection con = DriverManager.getConnection("jdbc:oracle:thin:@url:port:sid","UserName","Password");

            String[] products =  "Product1", "Product2", "Product3" ;
            String[] models   =  "Model1", "Model2", "Model3" ;
            String[] types    =  "Type1", "Type2", "Type3" ;

            ArrayDescriptor des = ArrayDescriptor.createDescriptor("SYS.ODCIVARCHAR2LIST", con);

            CallableStatement st = con.prepareCall("call TEST.RQUERY1(?,?,?,?)");

            st.setArray( 1, new ARRAY( des, con, products ) );
            st.setArray( 2, new ARRAY( des, con, models ) );
            st.setArray( 3, new ARRAY( des, con, types ) );
            st.registerOutParameter( 4, OracleTypes.CURSOR );
            st.execute();
            ResultSet cursor = ((OracleCallableStatement)st).getCursor(4);

            while ( cursor.next() )
            
                int id = cursor.getInt(1);
                String product = cursor.getString(2);
                String model   = cursor.getString(3);
                String type    = cursor.getString(4);

                System.out.println( String.format( "Id: %5d", id ) );
                System.out.println( String.format( "  Product: %s\t", product ) );
                System.out.println( String.format( "  Model:   %s", model ) );
                System.out.println( String.format( "  Type:    %s", type ) );
            
         catch(ClassNotFoundException | SQLException e) 
            System.out.println(e);
        
    

【参考方案2】：

编辑：

我终于明白你想要什么了。

如here 所述，您可以定义多个 with 语句。所以你可以这样写：

OPEN O_Cursor FOR
WITH PROD_SEARCH AS
(
     select regexp_substr(I_PRODUCT,'[^,]+', 1, level) pattern from dual
     connect by regexp_substr(I_PRODUCT, '[^,]+', 1, level) is not null
),
MODEL_SEARCH AS
(
     select regexp_substr(I_MODEL,'[^,]+', 1, level) pattern from dual
     connect by regexp_substr(I_MODEL, '[^,]+', 1, level) is not null
),
TYPE_SEARCH AS
(
     select regexp_substr(I_TYPE,'[^,]+', 1, level) pattern from dual
     connect by regexp_substr(I_TYPE, '[^,]+', 1, level) is not null
)
SELECT * FROM table1
  WHERE EXISTS (SELECT NULL FROM PROD_SEARCH WHERE table1.PRODUCT LIKE pattern )
AND EXISTS (SELECT NULL FROM MODEL_SEARCH WHERE table1.MODEL LIKE pattern );
AND EXISTS (SELECT NULL FROM TYPE_SEARCH WHERE table1.TYPE LIKE pattern );
END RQUERY1 ;

【讨论】：

更新了我的问题，如下所示：我希望使用存储过程从我的 java 代码中查询参数（I_PRODUCT、I_MODEL、I_TYPE），并需要显示输出值。

@KodS 我认为我明白你想要什么。编辑了答案。

谢谢，这正是我要找的