Remove some compilation warnings:

'unused variable' and
  'enumeration value not handled in switch'

ext/pdo_oci/oci_driver.c

@@ -537,7 +537,9 @@ static int pdo_oci_check_liveness(pdo_dbh_t *dbh TSRMLS_DC) /* {{{ */
 {
 	pdo_oci_db_handle *H = (pdo_oci_db_handle *)dbh->driver_data;
 	sb4 error_code = 0;
+#if (!((OCI_MAJOR_VERSION > 10) || ((OCI_MAJOR_VERSION == 10) && (OCI_MINOR_VERSION >= 2))))
 	char version[256];
+#endif
 
 	/* TODO move attached check to PDO level */
 	if (H->attached == 0) {

ext/pdo_oci/oci_statement.c

@@ -270,6 +270,12 @@ static int oci_stmt_param_hook(pdo_stmt_t *stmt, struct pdo_bound_param_data *pa
 		P = (pdo_oci_bound_param*)param->driver_data;
 
 		switch (event_type) {
+			case PDO_PARAM_EVT_FETCH_PRE:
+			case PDO_PARAM_EVT_FETCH_POST:
+			case PDO_PARAM_EVT_NORMALIZE:
+				/* Do nothing */
+				break;
+
 			case PDO_PARAM_EVT_FREE:
 				P = param->driver_data;
 				if (P) {

ext/pdo_odbc/odbc_driver.c

@@ -263,7 +263,7 @@ out:
 
 static int odbc_handle_quoter(pdo_dbh_t *dbh, const char *unquoted, int unquotedlen, char **quoted, int *quotedlen, enum pdo_param_type param_type  TSRMLS_DC)
 {
-	pdo_odbc_db_handle *H = (pdo_odbc_db_handle *)dbh->driver_data;
+	/* pdo_odbc_db_handle *H = (pdo_odbc_db_handle *)dbh->driver_data; */
 	/* TODO: figure it out */
 	return 0;
 }

ext/pdo_odbc/odbc_stmt.c

@@ -286,6 +286,12 @@ static int odbc_stmt_param_hook(pdo_stmt_t *stmt, struct pdo_bound_param_data *p
 	if (param->is_param) {
 
 		switch (event_type) {
+			case PDO_PARAM_EVT_FETCH_PRE:
+			case PDO_PARAM_EVT_FETCH_POST:
+			case PDO_PARAM_EVT_NORMALIZE:
+				/* Do nothing */
+				break;
+
 			case PDO_PARAM_EVT_FREE:
 				P = param->driver_data;
 				if (P) {
@@ -543,7 +549,6 @@ static int odbc_stmt_describe(pdo_stmt_t *stmt, int colno TSRMLS_DC)
 {
 	pdo_odbc_stmt *S = (pdo_odbc_stmt*)stmt->driver_data;
 	struct pdo_column_data *col = &stmt->columns[colno];
-	zend_bool dyn = FALSE;
 	RETCODE rc;
 	SWORD	colnamelen;
 	SDWORD	colsize, displaysize;
@@ -614,7 +619,6 @@ static int odbc_stmt_get_col(pdo_stmt_t *stmt, int colno, char **ptr, unsigned l
 
 	/* if it is a column containing "long" data, perform late binding now */
 	if (C->is_long) {
-		unsigned long alloced = 4096;
 		unsigned long used = 0;
 		char *buf;
 		RETCODE rc;