--- oci_statement.c.orig	2005-11-05 03:11:40.000000000 +0900
+++ PDO_OCI-1.0/oci_statement.c	2012-09-21 11:14:17.326937451 +0900
@@ -505,7 +505,7 @@
 			(param, OCI_DTYPE_PARAM, &colname, &namelen, OCI_ATTR_NAME, S->err));
 
 	col->precision = scale;
-	col->maxlen = data_size;
+	col->maxlen = data_size * 3;
 	col->namelen = namelen;
 	col->name = estrndup(colname, namelen);