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oci_execute

(PHP 5, PECL OCI8 >= 1.1.0)

oci_execute — Executes a statement

Description bool oci_execute ( resource $statement [, int $mode = OCI_COMMIT_ON_SUCCESS ] ) Executes a statementoci_parse().

After execution, statements like SELECToci_fetch_array().

Each parsed statement may be executed multiple times, saving the cost of re-parsing. This is commonly used for oci_bind_by_name().

Parameters

statement mode 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.

Return Values

Returns TRUE on success or FALSE on failure.

Examples

Example #1 oci_execute() for queries

$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) : " ") . "</td>\n";
    }
    echo "</tr>\n";
}
echo "</table>\n";

Example #2 oci_execute() without specifying a mode example

// 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

Example #3 oci_execute() with OCI_NO_AUTO_COMMIT example

// 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($stid, OCI_NO_AUTO_COMMIT);  // use OCI_DEFAULT for PHP <= 5.3.1
}
oci_commit($conn);  // commits all new values: 1, 2, 3, 4, 5

Example #4 oci_execute() with different commit modes example

// 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

Example #5 oci_execute() with OCI_DESCRIBE_ONLY example

$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";
}
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 DROP

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. The old function name can still be used in current versions, however it is deprecated and not recommended.

See Also

  • oci_parse() - Prepares an Oracle statement for execution





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