How to store Blob to PostgreSQL using hibernate 3

Question

Getting following error when trying to insert a new record into a table of PostgreSQL using Hibernate3

column "dml_script" is of type bytea but expression is of type bigint
  Hint: You will need to rewrite or cast the expression.
  Position: 187

Here is the mapping file:

import java.sql.Blob;
import java.util.Date;

import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.Id;
import javax.persistence.Lob;
import javax.persistence.Table;

@Entity
@Table(name="PMD14_DB_VERSION")
public class Dbversion {
    private Long identifier;
    private Long majorVersion;
    private Long minorVersion;
    private Long patchVersion;
    private Date dateExecuted;
    private String status;
    private Date dmlastupdate;
    private String userDetail;
    private Long dbapplicationfk;
    @Id
    @Column(name="ID")
    public Long getIdentifier() {
        return identifier;
    }
    public void setIdentifier(final Long identifier) {
        this.identifier = identifier;
    }

    @Column(name="DB_APPLICATION_FK")
    public Long getDbapplicationfk() {
        return dbapplicationfk;
    }
    public void setDbapplicationfk(final Long dbapplicationfk) {
        this.dbapplicationfk = dbapplicationfk;
    }

    @Column(name="REQUESTOR")
    public String getUserDetail() {
        return userDetail;
    }
    public void setUserDetail(final String userDetail) {
        this.userDetail = userDetail;
    }
    @Column(name="DMLASTUPDATE")
    public Date getDmlastupdate() {
        return dmlastupdate;
    }
    public void setDmlastupdate(final Date dmlastupdate) {
        this.dmlastupdate = dmlastupdate;
    }

    private String dmlScriptName;
    @Column(name="DML_SCRIPTNAME")
    public String getDmlScriptName() {
        return dmlScriptName;
    }
    public void setDmlScriptName(final String dmlScriptName) {
        this.dmlScriptName = dmlScriptName;
    }
    private Blob dmlScript;
    @Column(name="DML_SCRIPT")
    @Lob
    public Blob getDmlScript() {
        return dmlScript;
    }
    public void setDmlScript(final Blob dmlScript) {
        this.dmlScript = dmlScript;
    }

    @Column(name="STATUS")
    public String getStatus() {
        return status;
    }
    public void setStatus(final String status) {
        this.status = status;
    }
    @Column(name="DATEEXECUTED")
    public Date getDateExecuted() {
        return dateExecuted;
    }
    public void setDateExecuted(final Date dateExecuted) {
        this.dateExecuted = dateExecuted;
    }
    @Column(name="PATCHVERSION")
    public Long getPatchVersion() {
        return patchVersion;
    }
    public void setPatchVersion(final Long patchVersion) {
        this.patchVersion = patchVersion;
    }
    @Column(name="MINORVERSION")
    public Long getMinorVersion() {
        return minorVersion;
    }
    public void setMinorVersion(final Long minorVersion) {
        this.minorVersion = minorVersion;
    }

    @Column(name="MAJORVERSION")
    public Long getMajorVersion() {
        return majorVersion;
    }
    public void setMajorVersion(final Long majorVersion) {
        this.majorVersion = majorVersion;
    }
}

Please note dml_script is of type Blob, but hibernate 3 is firing following query.

Caused by: java.sql.BatchUpdateException: Batch entry 0 insert into PMD14_DB_VERSION (DATEEXECUTED, DB_APPLICATION_FK, DML_SCRIPT, DML_SCRIPTNAME, DMLASTUPDATE, MAJORVERSION, MINORVERSION, PATCHVERSION, STATUS, REQUESTOR, ID) values ('2012-02-08 14:27:25.383000 +05:30:00', '1', '31129', 'test.sql', '2012-02-08 14:27:25.243000 +05:30:00', '1', '1', '1', 'A', 'user', '1') was aborted.  Call getNextException to see the cause.

What should be the type of dml_script in java?