PHP: Hypertext Preprocessor (original) (raw)

oci_free_statement

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

oci_free_statement — Frees all resources associated with statement or cursor

Description

Parameters

statement

A valid OCI statement identifier.

Return Values

Returns [true](reserved.constants.php#constant.true) on success or [false](reserved.constants.php#constant.false) on failure.

Found A Problem?

Jen M. ¶

16 years ago

`oci_free_statement doesn't always free up cursors. I had a query where I performed the following functions in a loop:

OCIParse
OCIExecute
Oci_fetch_assoc
(Grab some field values)
OciFreeStatement

I didn't specify the use of a cursor, but ran into a "maximum
open cursors exceeded" error. Within my code, I had one "select * from table_with_lobs" query. When I changed the query to be "select a, b, c, from table_with_lobs" (where I specified the actual column names and where those columns were not LOB fields) the error message went away and I didn't have to resort to upping the max_open_cursors value in Oracle.

rada at instinctive dot it ¶

17 years ago

`If you are using cursors, make sure to free the statement and the cursor, especially if there is a possibility of running the proc/cursor again (e.g. with different parameters).

You need to do it explicitly, closing connection for example does not seem to release the cursor.

passerbyxp at gmail dot com ¶

12 years ago

`A freed statement is not "empty()", it's still a resource:

q=ociparse(q=oci_parse(q=ociparse(con,"SELECT sysdate FROM dual"); var_dump($q); // resource(5) of type (oci8 statement) var_dump(empty($q)); // bool(false) var_dump(oci_statement_type($q)); // string(6) "SELECT" echo "------\n"; oci_execute($q); var_dump($q); // same as above var_dump(empty($q)); var_dump(oci_statement_type($q)); echo "------\n"; oci_free_statement($q); var_dump($q); // resource(5) of type (Unknown) var_dump(empty($q)); // bool(false) var_dump(oci_statement_type($q)); // generates warning and returns false oci_close($con); ?>

So far I can not think of a way to determine if a statement is freed without using an additional flag...