oci_new_cursor()

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

分配并返回一个新的游标（语句句柄）

说明

oci_new_cursor(resource $connection): resource

oci_new_cursor()在指定的连接上分配一个新的语句句柄。

Example #1 在 Oracle 的存储过程中使用 REF CURSOR

<?php
// suppose your stored procedure info.output returns a ref cursor in :data
$conn = oci_connect("scott", "tiger");
$curs = oci_new_cursor($conn);
$stmt = oci_parse($conn, "begin info.output(:data); end;");
oci_bind_by_name($stmt, "data", $curs, -1, OCI_B_CURSOR);
oci_execute($stmt);
oci_execute($curs);
while ($data = oci_fetch_row($curs)) {
    var_dump($data);
}
oci_free_statement($stmt);
oci_free_statement($curs);
oci_close($conn);
?>

Example #2 在 Oracle 的 select 语句中使用 REF CURSOR

<?php
echo "<html><body>";
$conn = oci_connect("scott", "tiger");
$count_cursor = "CURSOR(select count(empno) num_emps from emp " .
                "where emp.deptno = dept.deptno) as EMPCNT from dept";
$stmt = oci_parse($conn, "select deptno,dname,$count_cursor");
oci_execute($stmt);
echo "<table border=\"1\">";
echo "<tr>";
echo "<th>DEPT NAME</th>";
echo "<th>DEPT #</th>";
echo "<th># EMPLOYEES</th>";
echo "</tr>";
while ($data = oci_fetch_assoc($stmt)) {
    echo "<tr>";
    $dname  = $data["DNAME"];
    $deptno = $data["DEPTNO"];
    echo "<td>$dname</td>";
    echo "<td>$deptno</td>";
    oci_execute($data["EMPCNT"]);
    while ($subdata = oci_fetch_assoc($data["EMPCNT"])) {
        $num_emps = $subdata["NUM_EMPS"];
        echo  "<td>$num_emps</td>";
    }
    echo "</tr>";
}
echo "</table>";
echo "</body></html>";
oci_free_statement($stmt);
oci_close($conn);
?>

oci_new_cursor()如果出错返回FALSE。

Note:
在 PHP 5.0.0 之前的版本必须使用ocinewcursor()替代本函数。该函数名仍然可用，为向下兼容作为oci_new_cursor()的别名。不过其已被废弃，不推荐使用。

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);
 ?>

Oracle 11.2 introduced support for REF CURSOR prefetching

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