diff --git a/framework/rbac/migrations/schema-oci.sql b/framework/rbac/migrations/schema-oci.sql
index 44fca9e..efe3526 100644
--- a/framework/rbac/migrations/schema-oci.sql
+++ b/framework/rbac/migrations/schema-oci.sql
@@ -9,41 +9,44 @@
  * @since 2.0
  */
 
-drop table if exists "auth_assignment";
-drop table if exists "auth_item_child";
-drop table if exists "auth_item";
-drop table if exists "auth_rule";
+drop table "auth_assignment";
+drop table "auth_item_child";
+drop table "auth_item";
+drop table "auth_rule";
 
+-- create new auth_rule table
 create table "auth_rule"
 (
    "name"  varchar(64) not null,
-   "data"  text,
+   "data"  varchar(1000),
    "created_at"           integer,
    "updated_at"           integer,
     primary key ("name")
 );
 
+-- create auth_item table
 create table "auth_item"
 (
    "name"                 varchar(64) not null,
    "type"                 integer not null,
-   "description"          text,
+   "description"          varchar(1000),
    "rule_name"            varchar(64),
-   "data"                 text,
+   "data"                 varchar(1000),
    "created_at"           integer,
    "updated_at"           integer,
-   primary key ("name"),
-   foreign key ("rule_name") references "auth_rule" ("name") on delete set null on update cascade,
-   key "type" ("type")
+        foreign key ("rule_name") references "auth_rule"("name") on delete set null,
+        primary key ("name")
 );
+-- adds oracle specific index to auth_item 
+CREATE INDEX auth_type_index ON "auth_item"("type");
 
 create table "auth_item_child"
 (
    "parent"               varchar(64) not null,
    "child"                varchar(64) not null,
    primary key ("parent","child"),
-   foreign key ("parent") references "auth_item" ("name") on delete cascade on update cascade,
-   foreign key ("child") references "auth_item" ("name") on delete cascade on update cascade
+   foreign key ("parent") references "auth_item"("name") on delete cascade,
+   foreign key ("child") references "auth_item"("name") on delete cascade
 );
 
 create table "auth_assignment"
@@ -52,5 +55,5 @@ create table "auth_assignment"
    "user_id"              varchar(64) not null,
    "created_at"           integer,
    primary key ("item_name","user_id"),
-   foreign key ("item_name") references "auth_item" ("name") on delete cascade on update cascade
+   foreign key ("item_name") references "auth_item" ("name") on delete cascade
 );