Sets the internal buffer size used to fetch each CLOB or BLOB value when the implementation gets the internal Oracle LOB locator from the database after a successful query call to oci_execute and for each subsequent internal fetch request to the database. Increasing this value can improve the performance of fetching smaller LOBs by reducing round-trips between PHP and the database. Memory usage will change.
The value affects LOBs returned as OCILob instances and also those returned using OCI_RETURN_LOBS.
Call oci_set_prefetch_lob before calling oci_execute. If it is not called, the value of oci8.prefetch_lob_size is used.
The LOB prefetch value should only be set with Oracle Database 12.2 or later.
A valid OCI8 statement identifier created by oci_parse and executed by oci_execute, or a REF CURSOR statement identifier.
The number of bytes of each LOB to be prefetched, >= 0
Returns true on success or false on failure.
|PECL OCI8 3.2|