Php/docs/function.oci-get-implicit-resultset
oci_get_implicit_resultset
(PHP 5 >= 5.6.0, PHP 7, PECL OCI8 >= 2.0.0)
oci_get_implicit_resultset — Returns the next child statement resource from a parent statement resource that has Oracle Database Implicit Result Sets
说明
oci_get_implicit_resultset
( resource $statement
) : resource
Used to fetch consectutive sets of query results after the execution of a stored or anonymous Oracle PL/SQL block where that block returns query results with the Oracle Database 12 (or later) DBMS_SQL.RETURN_RESULT PL/SQL function. This allows PL/SQL blocks to easily return query results.
The child statement can be used with any of the OCI8 fetching functions: oci_fetch(), oci_fetch_all(), oci_fetch_array(), oci_fetch_object(), oci_fetch_assoc() or oci_fetch_row()
Child statements inherit their parent statement's prefetch value, or it can be explicitly set with oci_set_prefetch().
参数
statement- A valid OCI8 statement identifier created by oci_parse() and executed by oci_execute(). The statement identifier may or may not be associated with a SQL statement that returns Implicit Result Sets.
返回值
Returns a statement handle for the next child statement available
on statement. Returns false when child
statements do not exist, or all child statements have been returned
by previous calls
to oci_get_implicit_resultset().
范例
Example #1 Fetching Implicit Result Sets in a loop
<?php$conn = oci_connect('hr', 'welcome', 'localhost/pdborcl');if (!$conn) { $e = oci_error(); trigger_error(htmlentities($e['message'], ENT_QUOTES), E_USER_ERROR);}$sql = 'DECLARE c1 SYS_REFCURSOR; BEGIN OPEN c1 FOR SELECT city, postal_code FROM locations WHERE ROWNUM < 4 ORDER BY city; DBMS_SQL.RETURN_RESULT(c1); OPEN c1 FOR SELECT country_id FROM locations WHERE ROWNUM < 4 ORDER BY city; DBMS_SQL.RETURN_RESULT(c1); END;';$stid = oci_parse($conn, $sql);oci_execute($stid);while (($stid_c = oci_get_implicit_resultset($stid))) { echo "<h2>New Implicit Result Set:</h2>\n"; echo "<table>\n"; while (($row = oci_fetch_array($stid_c, OCI_ASSOC+OCI_RETURN_NULLS)) != false) { echo "<tr>\n"; foreach ($row as $item) { echo " <td>".($item!==null?htmlentities($item, ENT_QUOTES|ENT_SUBSTITUTE):" ")."</td>\n"; } echo "</tr>\n"; } echo "</table>\n";}// Output is:// New Implicit Result Set:// Beijing 190518// Bern 3095// Bombay 490231// New Implicit Result Set:// CN// CH// INoci_free_statement($stid);oci_close($conn);?>
Example #2 Getting child statement handles individually
<?php$conn = oci_connect('hr', 'welcome', 'localhost/pdborcl');if (!$conn) { $e = oci_error(); trigger_error(htmlentities($e['message'], ENT_QUOTES), E_USER_ERROR);}$sql = 'DECLARE c1 SYS_REFCURSOR; BEGIN OPEN c1 FOR SELECT city, postal_code FROM locations WHERE ROWNUM < 4 ORDER BY city; DBMS_SQL.RETURN_RESULT(c1); OPEN c1 FOR SELECT country_id FROM locations WHERE ROWNUM < 4 ORDER BY city; DBMS_SQL.RETURN_RESULT(c1); END;';$stid = oci_parse($conn, $sql);oci_execute($stid);$stid_1 = oci_get_implicit_resultset($stid);$stid_2 = oci_get_implicit_resultset($stid);$row = oci_fetch_array($stid_1, OCI_ASSOC+OCI_RETURN_NULLS);var_dump($row);$row = oci_fetch_array($stid_2, OCI_ASSOC+OCI_RETURN_NULLS);var_dump($row);$row = oci_fetch_array($stid_1, OCI_ASSOC+OCI_RETURN_NULLS);var_dump($row);$row = oci_fetch_array($stid_2, OCI_ASSOC+OCI_RETURN_NULLS);var_dump($row);// Output is:// array(2) {// ["CITY"]=>// string(7) "Beijing"// ["POSTAL_CODE"]=>// string(6) "190518"// }// array(1) {// ["COUNTRY_ID"]=>// string(2) "CN"// }// array(2) {// ["CITY"]=>// string(4) "Bern"// ["POSTAL_CODE"]=>// string(4) "3095"// }// array(1) {// ["COUNTRY_ID"]=>// string(2) "CH"// }oci_free_statement($stid);oci_close($conn);?>
Example #3 Explicitly setting the Prefetch Count
<?php$conn = oci_connect('hr', 'welcome', 'localhost/pdborcl');if (!$conn) { $e = oci_error(); trigger_error(htmlentities($e['message'], ENT_QUOTES), E_USER_ERROR);}$sql = 'DECLARE c1 SYS_REFCURSOR; BEGIN OPEN c1 FOR SELECT city, postal_code FROM locations ORDER BY city; DBMS_SQL.RETURN_RESULT(c1); END;';$stid = oci_parse($conn, $sql);oci_execute($stid);$stid_c = oci_get_implicit_resultset($stid);oci_set_prefetch($stid_c, 200); // Set the prefetch before fetching from the child statementecho "<table>\n";while (($row = oci_fetch_array($stid_c, OCI_ASSOC+OCI_RETURN_NULLS)) != false) { echo "<tr>\n"; foreach ($row as $item) { echo " <td>".($item!==null?htmlentities($item, ENT_QUOTES|ENT_SUBSTITUTE):" ")."</td>\n"; } echo "</tr>\n";}echo "</table>\n";oci_free_statement($stid);oci_close($conn);?>
Example #4 Implicit Result Set example without using oci_get_implicit_resultset()
All results from all queries are returned consecutively.
<?php$conn = oci_connect('hr', 'welcome', 'localhost/pdborcl');if (!$conn) { $e = oci_error(); trigger_error(htmlentities($e['message'], ENT_QUOTES), E_USER_ERROR);}$sql = 'DECLARE c1 SYS_REFCURSOR; BEGIN OPEN c1 FOR SELECT city, postal_code FROM locations WHERE ROWNUM < 4 ORDER BY city; DBMS_SQL.RETURN_RESULT(c1); OPEN c1 FOR SELECT country_id FROM locations WHERE ROWNUM < 4 ORDER BY city; DBMS_SQL.RETURN_RESULT(c1); END;';$stid = oci_parse($conn, $sql);oci_execute($stid);// Note: oci_fetch_all and oci_fetch() cannot be used in this mannerecho "<table>\n";while (($row = oci_fetch_array($stid, OCI_ASSOC+OCI_RETURN_NULLS)) != false) { echo "<tr>\n"; foreach ($row as $item) { echo " <td>".($item!==null?htmlentities($item, ENT_QUOTES|ENT_SUBSTITUTE):" ")."</td>\n"; } echo "</tr>\n";}echo "</table>\n";// Output is:// Beijing 190518// Bern 3095// Bombay 490231// CN// CH// INoci_free_statement($stid);oci_close($conn);?>
注释
Note:
查询返回巨大数量的数据行时，通过增大 oci8.default_prefetch 值或使用 oci_set_prefetch() 可显著提高性能。
