fix prepare statement oci8

Author: michalsn

system/Database/OCI8/PreparedQuery.php

@@ -73,11 +73,33 @@ public function _execute(array $data): bool
             throw new BadMethodCallException('You must call prepare before trying to execute a prepared statement.');
         }
 
-        foreach (array_keys($data) as $key) {
-            oci_bind_by_name($this->statement, ':' . $key, $data[$key]);
+        $blobs = [];
+
+        foreach ($data as $key => $item) {
+            if (is_string($item) && mb_detect_encoding($item, 'UTF-8', true) === false) {
+                $blobs[$key] = oci_new_descriptor($this->db->connID, OCI_D_LOB);
+                oci_bind_by_name($this->statement, ':' . $key, $blobs[$key], -1, OCI_B_BLOB);
+            } else {
+                oci_bind_by_name($this->statement, ':' . $key, $item);
+            }
         }
 
-        $result = oci_execute($this->statement, $this->db->commitMode);
+        $result = oci_execute($this->statement, $blobs === [] ? $this->db->commitMode : OCI_NO_AUTO_COMMIT);
+
+        if ($blobs !== []) {
+            foreach ($blobs as $key => $blob) {
+                if (! $blob->save($data[$key])) {
+                    oci_rollback($this->db->connID);
+                    return false;
+                }
+            }
+
+            oci_commit($this->db->connID);
+
+            foreach ($blobs as $blob) {
+                $blob->free();
+            }
+        }
 
         if ($result && $this->lastInsertTableName !== '') {
             $this->db->lastInsertedTableName = $this->lastInsertTableName;