oci_execute

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

oci_execute执行语句

说明

oci_execute(resource $statement, int $mode = OCI_COMMIT_ON_SUCCESS): bool

执行先前从 oci_parse() 返回的 statement

执行后,像 INSERT 这样的语句默认会将数据提交到数据库中。对于像 SELECT 这样的语句,执行查询的逻辑。随后可以使用 oci_fetch_array() 等函数在 PHP 中获取查询结果。

每个已解析的语句可能会执行多次,节省了重新解析的成本。当使用 oci_bind_by_name() 绑定数据时,这通常用于 INSERT 语句。

参数

statement

有效的 OCI 语句标识符。

mode

可选的第二个参数可以是以下常量之一:

执行模式
常量 说明
OCI_COMMIT_ON_SUCCESS 当语句成功时,自动提交此连接的所有未完成更改。这是默认设置。
OCI_DESCRIBE_ONLY 使查询元数据可用于 oci_field_name() 等函数,但不创建结果集。任何后续的读取调用(例如 oci_fetch_array())都将失败。
OCI_NO_AUTO_COMMIT 不要自动提交更改。

使用 OCI_NO_AUTO_COMMIT 模式启动或继续事务。当连接关闭或脚本结束时,事务会自动回滚。显式调用 oci_commit() 来提交事务,或调用 oci_rollback() 来中止它。

插入或更新数据时,出于关系数据一致性和性能原因,建议使用事务。

If OCI_NO_AUTO_COMMIT mode is used for any statement including queries, and oci_commit() or oci_rollback() is not subsequently called, then OCI8 will perform a rollback at the end of the script even if no data was changed. To avoid an unnecessary rollback, many scripts do not use OCI_NO_AUTO_COMMIT mode for queries or PL/SQL. Be careful to ensure the appropriate transactional consistency for the application when using oci_execute() with different modes in the same script.

返回值

成功时返回 true, 或者在失败时返回 false

示例

示例 #1 oci_execute() 用于查询

<?php

$conn
= oci_connect('hr', 'welcome', 'localhost/XE');

$stid = oci_parse($conn, 'SELECT * FROM employees');
oci_execute($stid);

echo
"<table border='1'>\n";
while (
$row = oci_fetch_array($stid, OCI_ASSOC+OCI_RETURN_NULLS)) {
echo
"<tr>\n";
foreach (
$row as $item) {
echo
" <td>" . ($item !== null ? htmlentities($item, ENT_QUOTES) : "&nbsp;") . "</td>\n";
}
echo
"</tr>\n";
}
echo
"</table>\n";

?>

示例 #2 oci_execute() 未指定模式示例

<?php

// Before running, create the table:
// CREATE TABLE MYTABLE (col1 NUMBER);

$conn = oci_connect('hr', 'welcome', 'localhost/XE');

$stid = oci_parse($conn, 'INSERT INTO mytab (col1) VALUES (123)');

oci_execute($stid); // The row is committed and immediately visible to other users

?>

示例 #3 oci_execute()OCI_NO_AUTO_COMMIT 示例

<?php

// Before running, create the table:
// CREATE TABLE MYTABLE (col1 NUMBER);

$conn = oci_connect('hr', 'welcome', 'localhost/XE');

$stid = oci_parse($conn, 'INSERT INTO mytab (col1) VALUES (:bv)');
oci_bind_by_name($stid, ':bv', $i, 10);
for (
$i = 1; $i <= 5; ++$i) {
oci_execute($stid, OCI_NO_AUTO_COMMIT);
}
oci_commit($conn); // commits all new values: 1, 2, 3, 4, 5

?>

示例 #4 具有不同提交模式的 oci_execute() 示例

<?php

// Before running, create the table:
// CREATE TABLE MYTABLE (col1 NUMBER);

$conn = oci_connect('hr', 'welcome', 'localhost/XE');

$stid = oci_parse($conn, 'INSERT INTO mytab (col1) VALUES (123)');
oci_execute($stid, OCI_NO_AUTO_COMMIT); // data not committed

$stid = oci_parse($conn, 'INSERT INTO mytab (col1) VALUES (456)');
oci_execute($stid); // commits both 123 and 456 values

?>

示例 #5 oci_execute()OCI_DESCRIBE_ONLY 示例

<?php

$conn
= oci_connect('hr', 'welcome', 'localhost/XE');

$stid = oci_parse($conn, 'SELECT * FROM locations');
oci_execute($s, OCI_DESCRIBE_ONLY);
for (
$i = 1; $i <= oci_num_fields($stid); ++$i) {
echo
oci_field_name($stid, $i) . "<br>\n";
}

?>

注释

注意:

Transactions are automatically rolled back when connections are closed, or when the script ends, whichever is soonest. Explicitly call oci_commit() to commit a transaction.

Any call to oci_execute() that uses OCI_COMMIT_ON_SUCCESS mode explicitly or by default will commit any previous uncommitted transaction.

Any Oracle DDL statement such as CREATE or DROP will automatically commit any uncommitted transaction.

注意:

Because the oci_execute() function generally sends the statement to the database, oci_execute() can identify some statement syntax errors that the lightweight, local oci_parse() function does not.

参见