Question

我正在使用hibernate从SQL Server 2014数据库中获取一些数据。

有一个表包含用户定义数据类型的列：

dbo.Nodos
    Id (PK, int, not null)
    Tipo (PK, FK, TipoNodo(tinyint), not null)
    Nombre (varchar(40), null)
    PosX (Coordenada(real), not null)
    PosY (Coordenada(real), not null)
    Label (varchar(8), not null)

这些数据类型是Coordenada和TipoNodo：

User-Defined Data Types
    dbo.Coordenada (real, not null)
    dbo.TipoNodo (tinyint, not null)

我将Nodos表映射为Java中的StopDTO类：

@Entity
@Table(name = "Nodos")
public class StopDTO {

    /*
     * Atributos
     */
    @Id
    @Column(name = "Id", insertable = false, updatable = false)
    private Integer id;
    @Column(name = "Tipo", insertable = false, updatable = false)
    private Integer tipo;
    @Column(name = "Nombre", insertable = false, updatable = false)
    private String nombre;
    @Column(name = "PosX", insertable = false, updatable = false)
    private Float posx;
    @Column(name = "PosY", insertable = false, updatable = false)
    private Float posy;
    @Column(name = "Label", insertable = false, updatable = false)
    private String label;
    ...

当我查询StopDTOs（使用NamedNativeQuery）时出现问题，我收到以下消息：

引起：org.hibernate.tool.schema.spi.SchemaManagementException：模式验证：在[PosX]列中遇到错误的列类型表[Nodos];发现[coordenada（Types＃REAL）]，但期待[浮动（类型#FLOAT）]在 org.hibernate.tool.schema.internal.SchemaValidatorImpl.validateColumnType（SchemaValidatorImpl.java:165）在 org.hibernate.tool.schema.internal.SchemaValidatorImpl.validateTable（SchemaValidatorImpl.java:150）在 org.hibernate.tool.schema.internal.SchemaValidatorImpl.performValidation（SchemaValidatorImpl.java:95）在 org.hibernate.tool.schema.internal.SchemaValidatorImpl.doValidation（SchemaValidatorImpl.java:62） ...

通过为Coordenada和TipoNodo实现几个UserTypes来解决这个问题吗？如果不是，我该怎么办？

谢谢！

Answer 1

请检查Hibernate中配置的方言，它应该是SQLServer2008Dialect。

Answer 2

解决！

确实，这是预期的：开发一对UserType。如果有人需要，我会发布代码：

<强> TipoNodoUserType

package com.mycompany.usertype;
import java.io.Serializable;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Types;
import java.util.Objects;

import org.hibernate.HibernateException;
import org.hibernate.engine.spi.SessionImplementor;
import org.hibernate.type.descriptor.java.ShortTypeDescriptor;
import org.hibernate.usertype.UserType;

public class TipoNodoUserType implements UserType {

    public static final TipoNodoUserType INSTANCE = new TipoNodoUserType();

    @Override
    public int[] sqlTypes() {
        return new int[] {Types.TINYINT};
    }

    @SuppressWarnings("rawtypes")
    @Override
    public Class returnedClass() {
        return Short.class;
    }

    @Override
    public boolean equals(Object x, Object y) throws HibernateException {
        return Objects.equals(x, y);
    }

    @Override
    public int hashCode(Object x) throws HibernateException {
        return Objects.hashCode(x);
    }

    @Override
    public Object nullSafeGet(ResultSet rs, String[] names, SessionImplementor session, Object owner)
            throws HibernateException, SQLException {
        String columnName = names[0];
        Short columnValue = (Short) rs.getObject(columnName);
        return columnValue == null ? null : columnValue;
    }

    @Override
    public void nullSafeSet(PreparedStatement st, Object value, int index, SessionImplementor session)
            throws HibernateException, SQLException {
        if(value == null){
            st.setNull( index, Types.TINYINT );
        }else{
            String stringValue = ShortTypeDescriptor.INSTANCE.toString((Short)value);
            st.setString(index, stringValue);
        }
    }

    @Override
    public Object deepCopy(Object value) throws HibernateException {
        return value;
    }

    @Override
    public boolean isMutable() {
        return true;
    }

    @Override
    public Serializable disassemble(Object value) throws HibernateException {
        return (Serializable) value;
    }

    @Override
    public Object assemble(Serializable cached, Object owner) throws HibernateException {
        return cached;
    }

    @Override
    public Object replace(Object original, Object target, Object owner) throws HibernateException {
        return original;
    }

}

<强> CoordenadaUserType

package com.mycompany.usertype;
import java.io.Serializable;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Types;
import java.util.Objects;

import org.hibernate.HibernateException;
import org.hibernate.engine.spi.SessionImplementor;
import org.hibernate.type.descriptor.java.FloatTypeDescriptor;
import org.hibernate.usertype.UserType;

public class CoordenadaUserType implements UserType {

    public static final CoordenadaUserType INSTANCE = new CoordenadaUserType();

    @Override
    public int[] sqlTypes() {
        return new int[] {Types.REAL};
    }

    @SuppressWarnings("rawtypes")
    @Override
    public Class returnedClass() {
        return Float.class;
    }

    @Override
    public boolean equals(Object x, Object y) throws HibernateException {
        return Objects.equals(x, y);
    }

    @Override
    public int hashCode(Object x) throws HibernateException {
        return Objects.hashCode(x);
    }

    @Override
    public Object nullSafeGet(ResultSet rs, String[] names, SessionImplementor session, Object owner)
            throws HibernateException, SQLException {
        String columnName = names[0];
        Float columnValue = (Float) rs.getObject(columnName);
        return columnValue == null ? null : columnValue;
    }

    @Override
    public void nullSafeSet(PreparedStatement st, Object value, int index, SessionImplementor session)
            throws HibernateException, SQLException {
        if(value == null){
            st.setNull( index, Types.REAL );
        }else{
            String stringValue = FloatTypeDescriptor.INSTANCE.toString((Float)value);
            st.setString(index, stringValue);
        }
    }

    @Override
    public Object deepCopy(Object value) throws HibernateException {
        return value;
    }

    @Override
    public boolean isMutable() {
        return true;
    }

    @Override
    public Serializable disassemble(Object value) throws HibernateException {
        return (Serializable) value;
    }

    @Override
    public Object assemble(Serializable cached, Object owner) throws HibernateException {
        return cached;
    }

    @Override
    public Object replace(Object original, Object target, Object owner) throws HibernateException {
        return original;
    }

}

<强> StopDTO

    @Entity
@Table(name = "Nodos")
public class StopDTO implements java.io.Serializable{

    /*
     * Atributos
     */
    private static final long serialVersionUID = 8171715812406080593L;

    @Id
    @Column(name = "Id", insertable = false, updatable = false)
    private Integer id;
    @Id
    @Column(name = "Tipo", insertable = false, updatable = false)
    @Type(type = "com.mycompany.usertype.TipoNodoUserType")
    private Short tipo;
    @Column(name = "Nombre", insertable = false, updatable = false)
    private String nombre;
    @Column(name = "PosX", insertable = false, updatable = false)
    @Type(type = "com.mycompany.usertype.CoordenadaUserType")
    private Float posx;
    @Column(name = "PosY", insertable = false, updatable = false)
    @Type(type = "com.mycompany.usertype.CoordenadaUserType")
    private Float posy;
    @Column(name = "Label", insertable = false, updatable = false)
    private String label;
    ...
    // Don't forget to code an empty constructor, setters/getters for every attribute and implementing hashCode and equals methods (as we're implementing Serializable interface).

用户定义的数据类型遇到错误的列类型

2 个答案: