Hibernate says invalid identifier even if column is available in db

Question

I am using hibernate 4.0 as orm for one of my project... When i am trying to do a session.get( Table.class, 1 ) I am getting the following error...

Caused by: java.sql.SQLSyntaxErrorException: ORA-00904: "TABLETYPE0_"."TTPNAME": invalid identifier
at oracle.jdbc.driver.T4CTTIoer.processError(T4CTTIoer.java:440)
at oracle.jdbc.driver.T4CTTIoer.processError(T4CTTIoer.java:396)
at oracle.jdbc.driver.T4C8Oall.processError(T4C8Oall.java:837)
at oracle.jdbc.driver.T4CTTIfun.receive(T4CTTIfun.java:445)
at oracle.jdbc.driver.T4CTTIfun.doRPC(T4CTTIfun.java:191)
at oracle.jdbc.driver.T4C8Oall.doOALL(T4C8Oall.java:523)
at oracle.jdbc.driver.T4CPreparedStatement.doOall8(T4CPreparedStatement.java:207)
at oracle.jdbc.driver.T4CPreparedStatement.executeForDescribe(T4CPreparedStatement.java:863)
at oracle.jdbc.driver.OracleStatement.executeMaybeDescribe(OracleStatement.java:1153)
at oracle.jdbc.driver.OracleStatement.doExecuteWithTimeout(OracleStatement.java:1275)
at oracle.jdbc.driver.OraclePreparedStatement.executeInternal(OraclePreparedStatement.java:3576)
at oracle.jdbc.driver.OraclePreparedStatement.executeQuery(OraclePreparedStatement.java:3620)
at oracle.jdbc.driver.OraclePreparedStatementWrapper.executeQuery(OraclePreparedStatementWrapper.java:1491)
at com.mchange.v2.c3p0.impl.NewProxyPreparedStatement.executeQuery(NewProxyPreparedStatement.java:116)
at org.hibernate.engine.jdbc.internal.ResultSetReturnImpl.extract(ResultSetReturnImpl.java:82)
... 24 more

Hibernate:

select
    tabletype0_.ttp_id as ttp_id1_8_,
    tabletype0_.ttp_delete_fl as ttp_delete_fl2_8_,
    tabletype0_.ptn_id as ptn_id3_8_,
    tabletype0_.ttpCreatedDttm as ttpCreatedDttm4_8_,
    tabletype0_.ttpName as ttpName5_8_,
    tabletype0_.ttpVersion as ttpVersion6_8_ 
from
    table_type tabletype0_ 
where
    tabletype0_.ttpName='system'

My hibernate has annotation mapping as follows...

@javax.persistence.Basic
@javax.persistence.Column( 
    name = "ttp_name", 
    nullable = true, 
    insertable = true, 
    updatable = true )
@org.hibernate.annotations.Type( 
    type = "org.custom.hibernate.types.StringType" )
@javax.validation.constraints.NotNull
@org.hibernate.validator.constraints.NotEmpty
@org.hibernate.validator.constraints.Length( max = 255 )
private String ttpName;


public String getTtpName() 
{ 
    return this.ttpName; 
}


public void setTtpName( String val ) 
{
    this.ttpName = val; 
}

I dont know what mistake I am doing... Since I have the column name in the db as ttp_name, hibernate tries to query with the identifier ttpName... Please could some body help me in this...

Thanks in advance...