oci_new_cursor

(PHP 5, PHP 7, PHP 8, PECL OCI8 >= 1.1.0)

oci_new_cursor — 分配并返回新的游标（语句句柄）

说明

oci_new_cursor(resource $connection): resource|false

在指定连接上分配新的语句句柄。

参数

connection: Oracle 连接标识符，由 oci_connect() 或 oci_pconnect() 返回。

返回值

返回新的语句句柄，或者失败时返回 false。

示例

示例 #1 在调用 Oracle 存储过程中绑定 REF CURSOR

<?php

// Precreate:
//   create or replace procedure myproc(myrc out sys_refcursor) as
//   begin
//     open myrc for select first_name from employees;
//   end;

$conn = oci_connect("hr", "hrpwd", "localhost/XE");
if (!$conn) {
    $m = oci_error();
    trigger_error(htmlentities($m['message']), E_USER_ERROR);
}

$curs = oci_new_cursor($conn);
$stid = oci_parse($conn, "begin myproc(:cursbv); end;");
oci_bind_by_name($stid, ":cursbv", $curs, -1, OCI_B_CURSOR);
oci_execute($stid);

oci_execute($curs);  // Execute the REF CURSOR like a normal statement id
while (($row = oci_fetch_array($curs, OCI_ASSOC+OCI_RETURN_NULLS)) != false) {
    echo $row['FIRST_NAME'] . "<br />\n";
}

oci_free_statement($stid);
oci_free_statement($curs);
oci_close($conn);

?>

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mgumiel at mgait dot com ¶

12 years ago

Some packages in oracle are functions, and that functions returns a cursor.

For example:

CREATE FUNCTION F_Function( p1 char(2), p2 int)
  RETURN SYS_REFCURSOR
AS
  my_cursor SYS_REFCURSOR;
BEGIN
  OPEN my_cursor FOR SELECT * FROM allitems 
                           WHERE (cod=p1) 
                                      AND (Number=p2);
  RETURN my_cursor;
END F_Function; 

Here is the code that allows to obtain data from a function that returns a cursor.

<pre>
<?php
 $conn=oci_connect("server", "user", "pass");
if (!$conn) {
    $e = oci_error();
    trigger_error(htmlentities($e['message']), E_USER_ERROR);
}

    //You must asign before.
    $p1 = '03';
    $p2 = 2012016191;

    $stid = oci_parse($conn, 'begin :cursor := server.PKG_package.F_Function(:p1,:p2); end;');
    $p_cursor = oci_new_cursor($conn);

    //Send parameters variable  value  lenght
    oci_bind_by_name($stid, ':p1', $p1,2);
    oci_bind_by_name($stid, ':p2', $p2,10);

    //Bind Cursor     put -1 
    oci_bind_by_name($stid, ':cursor', $p_cursor, -1, OCI_B_CURSOR);

    // Execute Statement
    oci_execute($stid);
    oci_execute($p_cursor, OCI_DEFAULT);

    oci_fetch_all($p_cursor, $cursor, null, null, OCI_FETCHSTATEMENT_BY_ROW);
    echo '<br>';
    print_r($cursor);
 ?>

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-3

sixd at php dot net ¶

14 years ago

Oracle 11.2 introduced support for REF CURSOR prefetching

down

-4

sixd at php dot net ¶

16 years ago

Because OCI8 uses "prefetching" to greatly improve returning query results, but Oracle doesn't support prefetching for REF CURSORs, application performance using REF CURSORs can be greatly improved by writing a PL/SQL function that pulls data from the REF CURSOR and PIPEs the output. The new function can be queried in a SELECT as if it were a table.  See http://blogs.oracle.com/opal/2008/11/
converting_ref_cursor_to_pipe.html