hibernate不能访问时,schema问题

<?xml version="1.0" encoding="utf-8"?>

<!DOCTYPE hibernate-mapping PUBLIC "-//Hibernate/Hibernate Mapping DTD 3.0//EN"

"http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd">

<!-- 

    Mapping file autogenerated by MyEclipse Persistence Tools

-->

<hibernate-mapping>

    <class name="com.bc.bean.InformationParentSheet" table="INFORMATION_PARENT_SHEET" schema="ORACLE">

        <id name="ipId" type="java.lang.Long">

            <column name="IP_ID" precision="6" scale="0" />

            <generator class="sequence">

            <param name="sequence">T_IP_ID_SEQ</param>

            </generator>

        </id>

        <property name="ipName" type="java.lang.String">

            <column name="IP_NAME" length="10" not-null="true" unique="true" />

        </property>

        <property name="ipRemark" type="java.lang.String">

            <column name="IP_REMARK" length="500" />

        </property>

        <set name="informationSheets" inverse="true"  lazy="true">

            <key>

                <column name="IF_PID" precision="6" scale="0" not-null="true" />

            </key>

            <one-to-many class="com.bc.bean.InformationSheet" />

        </set>

    </class>

</hibernate-mapping>