oci_execute
Executes a statement previously returned from oci_parse.
After execution, statements like INSERT will have data committed to the database by default. For statements like SELECT, execution performs the logic of the query. Query results can subsequently be fetched in PHP with functions like oci_fetch_array.
Each parsed statement may be executed multiple times, saving the cost of re-parsing. This is commonly used for INSERT statements when data is bound with oci_bind_by_name.
Parameters
- statement
-
A valid OCI statement identifier.
- mode
-
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_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 equivalent to OCI_NO_AUTO_COMMIT. Using OCI_NO_AUTO_COMMIT mode starts or continues 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.
Return Values
Returns true on success or false on failure.
Notes
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.