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 Post subject: @EmbeddedId has some nullable columns
PostPosted: Tue Dec 06, 2016 4:25 pm 

Joined: Tue Dec 06, 2016 2:20 pm
Posts: 1
Data Set

RR_SS_2,POD,POD_RR2,3/31/2009,12/31/2030 11:59:59 PM,2009-03-31T07:00:00-00:00,2031-01-01T07:59:59-00:00,,,,,,,RR_7_N002,,,.347150259471503,0.00797,3/31/2009,12/31/2030 11:59:59 PM,2009-03-31T07:00:00-00:00,2031-01-01T07:59:59-00:00
RR_SS_2,POD,POD_RR2,3/31/2009,12/31/2030 11:59:59 PM,2009-03-31T07:00:00-00:00,2031-01-01T07:59:59-00:00,,,,,,,RRTT1_7_N002,,,.326424870264249,0.00801,3/31/2009,12/31/2030 11:59:59 PM,2009-03-31T07:00:00-00:00,2031-01-01T07:59:59-00:00
RR_SS_2,POD,POD_RR2,3/31/2009,12/31/2030 11:59:59 PM,2009-03-31T07:00:00-00:00,2031-01-01T07:59:59-00:00,,,,,,,RRTT2_7_N002,,,.326424870264249,0.00801,3/31/2009,12/31/2030 11:59:59 PM,2009-03-31T07:00:00-00:00,2031-01-01T07:59:59-00:00
RR_SS_2,POD,POD_RR2,3/31/2009,12/31/2030 11:59:59 PM,2009-03-31T07:00:00-00:00,2031-01-01T07:59:59-00:00,,,,DUANE_1_PL1X3,,,,,,,,4/20/2013,12/31/2030 11:59:59 PM,2013-04-20T07:00:00-00:00,2031-01-01T07:59:59-00:00

My Entity Class which maps to the view ,

@Table(name = "MF2_ANODE_V1_V")
@NamedQuery(name = "Anode.findAll", query = "SELECT a FROM Anode a")
public class Anode implements Serializable {

private static final long serialVersionUID = -1534272615371130692L;

private AnodePk anodePk;

private String anodeStartdatetimeGmt;

private String anodeEnddatetimeGmt;

@Column(name = "QUALIFASORDER")
private BigInteger qualifasorder;

@Column(name = "APNODE_TYPE")
private String apnodeType;

@Column(name = "OFFPEAK")
private BigDecimal offpeak;

@Column(name = "ONPEAK")
private BigDecimal onpeak;

@Column(name = "FACTOR")
private BigDecimal factor;

@Column(name = "PODLOSSFACTOR")
private BigDecimal podlossfactor;

@Column(name = "MAPPING_STRT_DT_TM")
private Date mappingStrtDtTm;

@Column(name = "MAPPING_END_DT_TM")
private Date mappingEndDtTm;

private String mappingStartdatetimeGmt;

private String mappingEnddatetimeGmt;

@Column(name = "APNODE_MRID")
private String apnodeMrid;

My First Embeddable Class

public class AnodePk implements Serializable {

   private static final long serialVersionUID = -4870154692805156774L;

   @Column(name = "ANODE_MRID")
   private String anodeMrid;

   @Column(name = "ANODE_TYPE")
   private String anodeType;

   @Column(name = "ANODE_NAME")
   private String anodeName;

       @Column(name = "GEN_MRID")
   private String genMrid;

   @Column(name = "LOAD_MRID")
   private String loadMrid;

   @Column(name = "INTERTIE_MRID")
   private String intertieMrid;

   @Column(name = "CNODE_MRID")
   private String cnodeMrid;

if we see although i am trying to use the natural key as which is combination of the following columns in the embedable class
anodeMrid , anodeName , anodeType , ( one of the value will be present from next list of columns ) genMrid; loadMrid; intertieMrid; cnodeMrid;

The main problem is that actually each record returned by the view is natural key and unique only for following omcbninations

anodeMrid , anodeName , anodeType ,genMrid1
anodeMrid , anodeName , anodeType ,loadMrid1
anodeMrid , anodeName , anodeType ,intertieMrid
anodeMrid , anodeName , anodeType ,loadMrid2
anodeMrid , anodeName , anodeType ,cnodeMrid1

so only one field will have a value not all the others genMrid; loadMrid; intertieMrid; cnodeMrid; for each record .

Please suggest what is the best way to implement that scenerios.

Right now Hibenrate returns 5 rows but all the data populated is as below.

anodeMrid , anodeName , anodeType ,genMrid1
anodeMrid , anodeName , anodeType ,genMrid1
anodeMrid , anodeName , anodeType ,genMrid1
anodeMrid , anodeName , anodeType ,genMrid1

assume that i Have implemented equals methods .

Sanjay Gautam

 Post subject: Re: @Embeddable has some column nullable
PostPosted: Wed Dec 07, 2016 4:30 am 
Hibernate Team
Hibernate Team

Joined: Thu Sep 11, 2014 2:50 am
Posts: 1638
Location: Romania
For a composite Primary Key, every individual column must be NOT NULL.

The Hibernate identifier is no different because the identifier value must be unique. Only NOT NULL columns can guarantee uniqueness. Hence, you need to reconsider your database schema.

If you liked my answer, you are going to love my High-Performance Java Persistence book and my blog as well.

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