PHP:oci_execute()的用法_Oracle函数(php oci_connect)

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(PHP 5, PECL OCI8 >= 1.1.0)

oci_execute — 执行一条语句

oci_execute() 执行一条之前被解析过的语句（见 oci_parse()）。可选参数 mode 允许定义执行模式（默认是 OCI_COMMIT_ON_SUCCESS）。如果不需要将语句自动提交，则需要把 mode 设为 OCI_DEFAULT。

用 OCI_DEFAULT 模式时，将建立一个事务。事务会在关闭连接或脚本结束时（看哪个先）自动回卷。需要明确调用 oci_commit() 来提交事务，或者 oci_rollback() 中止事务。

成功时返回 TRUE， 或者在失败时返回 FALSE。

Note:

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

statement

A valid OCI statement identifier.

An optional second parameter can be one of the following constants: Execution Modes Constant Description OCI_COMMIT_ON_SUCCESS Automatically commit all outstanding changes for this connection when the statement has succeeded. This is the default. OCI_DEFAULT Obsolete as of PHP 5.3.2 (PECL OCI8 1.4) but still available for backward compatibility. Use the equivalent OCI_NO_AUTO_COMMIT in new code. OCI_DESCRIBE_ONLY Make query meta data available to functions like oci_field_name() but do not create a result set. Any subsequent fetch call such as oci_fetch_array() will fail. OCI_NO_AUTO_COMMIT Do not automatically commit changes. Prior to PHP 5.3.2 (PECL OCI8 1.4) use OCI_DEFAULT which is an alias for OCI_NO_AUTO_COMMIT.

Using OCI_NO_AUTO_COMMIT mode starts a transaction. Transactions are automatically rolled back when the connection is closed, or when the script ends. Explicitly call oci_commit() to commit a transaction, or oci_rollback() to abort it.

When inserting or updating data, using transactions is recommended for relational data consistency and for performance reasons.

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.

成功时返回 TRUE， 或者在失败时返回 FALSE。

Example #1 oci_execute() for queries

Example #2 oci_execute() without specifying a mode example

Example #3 oci_execute() with OCI_NO_AUTO_COMMIT example

Example #4 oci_execute() with different commit modes example

Example #5 oci_execute() with OCI_DESCRIBE_ONLY example

Note:

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.

Note:

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.

Note:

In PHP versions before 5.0.0 use ociexecute() instead. 在当前版本中，旧的函数名还可以被使用，但已经被废弃并不建议使用。

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