Oracle ref kurzor s parametrom
在 OracleDataReader 中检索 REF CURSOR 参数 此示例执行一个 PL/SQL 存储过程，返回 REF CURSOR 参数，并将值作为 OracleDataReader 读取。 使用 OracleDataReader 从多个 REF CURSOR 检索数据 此示例执行一个 PL/SQL 存储过程，返回两个 REF CURSOR 参数，并使用 OracleDataReader 读取值。
Without the need to insert data in database. The following statement generates SYS_REFCURSOR in Oracle (example with values and column names): OPEN cur_data FOR select '000000' inn, 'Ch' lastname from dual; ref cursor and %rowcount why cant i use a cursor attribute with refcursor datatype when my query is returning no rows selected .i want to do a check on %rowcount = 0and tell my ref cursor to point to another query work area i am using oracle 7 A REF CURSOR is a PL/SQL datatype that you can use in a query to fetch data. Each REF CURSOR query is associated with a PL/SQL function that returns a strongly typed REF CURSOR. The PL/SQL function must ensure that the REF CURSOR is opened and associated with a SELECT statement that has a SELECT list that matches the REF CURSOR type.
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PL/SQL has two forms of REF CURSOR typeS: strong typed and weak typed REF CURSOR. The following shows an example of a strong REF CURSOR. DECLARE TYPE customer_t IS REF CURSOR … 8/1/2016 A ref cursor is a variable, defined as a cursor type, which will point to, or reference a cursor result. The advantage that a ref cursor has over a plain cursor is that is can be passed as a variable to a procedure or a function. The REF CURSOR can be assigned to other REF CURSOR variables. REF CURSOR types may be passed as parameters to or from stored procedures and functions. The return type of a function may also be a REF CURSOR type.
Using REF CURSOR s is one of the most powerful, flexible, and scalable ways to return query results from an Oracle Database to a client application. A REF CURSOR is a PL/SQL data type whose value is the memory address of a query work area on the database. In essence, a REF CURSOR is a pointer or a handle to a result set on the database.
The REF CURSOR XE "REF CURSOR" can be assigned to other REF CURSOR variables. This is a powerful capability in that A ref cursor which has fixed return type is called a Strong Ref Cursor in Oracle Database.
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If you lose your result set -- that indicates you are not done with the ref cursor.----I wrote a "Stored Procedure" using ref cursor,and be a Data Set of "Reporting Service".I can't close ref cusor becasue of losing my result set. Oracle 12c introduced implicit statement results, and SQL*Plus and SQLcl display the contents of implicit statement results. DECLARE l_cursor SYS_REFCURSOR; BEGIN l_cursor := get_ref_cursor; DBMS_SQL.return_result(l_cursor); END; / PL/SQL procedure successfully completed. The remaining usage like opening the cursor, selecting into the cursor and closing the cursor is the same across both the cursor types. For the rest of this chapter our examples will primarily be making use of the SYS_REFCURSOR cursors. All you need to change in the examples to make them work for user defined REF CURSOR s is the declaration Jan 24, 2017 · Fetch Ref cursor to another ref cursor Hi,First of all Thank you Gurus!
The advantage that a ref cursor has over a plain cursor is that is can be passed as a variable to a procedure or a function. The REF CURSOR can be assigned to other REF CURSOR variables. After creating package specs that define the REF CURSORs, you are ready to define the queries, as described in this section. To create a REF CURSOR query: In the Object Navigator, double-click the view icon next to the Data Model node to display the Data Model view. In the Data Model view, click the Ref Cursor Query tool in the tool palette. To declare a cursor variable, you use the REF CURSOR is the data type. PL/SQL has two forms of REF CURSOR typeS: strong typed and weak typed REF CURSOR.
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If the REF CURSOR data type is obtained as an OracleRefCursor object, it can be used to create an OracleDataReader object or populate a DataSet from it. When accessing a REF CURSOR data type, always bind it as an OracleDbType.RefCursor parameter. To declare a cursor variable, you use the REF CURSOR is the data type. PL/SQL has two forms of REF CURSOR typeS: strong typed and weak typed REF CURSOR. The following shows an example of a strong REF CURSOR. Oracle REF CURSOR With the REF_CURSOR you can return a recordset/cursor from a stored procedure.
There are several ways to return query results from an Oracle database to a client application, using Oracle Data Provider for .NET; one of the most powerful, flexible, and scalable methods is to use ref cursor. Explicit Cursor. Programmers are allowed to create named context area to execute their DML operations to get more control over it. The explicit cursor should be defined in the declaration section of the PL/SQL block, and it is created for the 'SELECT' statement that needs to be used in the code. Cursor.fetchmany ([numRows=cursor.arraysize]) ¶ Fetch the next set of rows of a query result, returning a list of tuples. An empty list is returned if no more rows are available.
Let’s look at these points one by one. First, a ref cursor can be dynamically opened and defined at runtime, in contrast to a regular cursor, which is static and defined at compile time.
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4/23/2013
A REF CURSOR data type can be obtained as an OracleDataReader, DataSet, or OracleRefCursor object. If the REF CURSOR data type is obtained as an OracleRefCursor object, it can be used to create an OracleDataReader object or populate a DataSet from it. When accessing a REF CURSOR data type, always bind it as an OracleDbType.RefCursor parameter. A REF CURSOR is a PL/SQL data type whose value is the memory address of a query work area on the database. In essence, a REF CURSOR is a pointer or a handle to a result set on the database.
2. Try this one. Hope this helps. I dont have workspace with me so pardon syntax erro r if any. CREATE OR REPLACE PROCEDURE test_ref_prc ( p_ref_out OUT sys_refcursor) AS BEGIN OPEN p_ref_out FOR SELECT LEVEL FROM DUAL CONNECT BY LEVEL < 10; END; CREATE OR REPLACE PROCEDURE test_ref2 AS refc sys_refcursor; num_ntt NUMBER_NTT; BEGIN test_ref_prc
To slightly modify @Eddie Awad's answer, the usual code pattern I use for fetching from a cursor variable is as follows: DECLARE l_cur SYS_REFCURSOR; l_col VARCHAR2 (10); BEGIN OPEN l_cur FOR SELECT 'Hi there' col FROM DUAL WHERE 1 = 0; DBMS_OUTPUT.PUT_LINE('Opened cursor'); <
FUNCTION GetXYZ( uniqueId IN somepackage.Number_Type, resultItems OUT somepackage.Ref_Type) RETURN somepackage.Error_Type; These are the type definitions in "somepackage": SUBTYPE Number_Type IS NUMBER(13); TYPE Ref_Type IS REF CURSOR; SUBTYPE Error_Type IS NUMBER; And this is the code that I have tried: 9/28/2017 2. Try this one. Hope this helps. I dont have workspace with me so pardon syntax erro r if any. CREATE OR REPLACE PROCEDURE test_ref_prc ( p_ref_out OUT sys_refcursor) AS BEGIN OPEN p_ref_out FOR SELECT LEVEL FROM DUAL CONNECT BY LEVEL < 10; END; CREATE OR REPLACE PROCEDURE test_ref2 AS refc sys_refcursor; num_ntt NUMBER_NTT; BEGIN test_ref_prc Answer: Here is an example script that performs dynamic SQL and returns the data as a ref cursor.-- First, we declare the package specs create or replace package test_pack is type ref_cur is ref cursor; procedure printme(ref_var ref_cur); end; /-- Now we create a print procedure that receives a ref cursor-- and prints the row data create or replace package body test_pack is procedure printme(ref_var ref_cur) is 12/5/2006 JDBC does not support a cursor variable data type and the driver converts the REF CURSOR parameter into a result set instead of returning as output parameter. Resolution In your application, omit any parameter markers for the REF CURSOR as shown in the example below and in following link and do not declare an output parameter for the REF CURSOR.