javax.persistence

Annotation Type Lob


  • @Target(value={METHOD,FIELD})
     @Retention(value=RUNTIME)
    public @interface Lob
    Specifies that a persistent property or field should be persisted as a large object to a database-supported large object type.

    Portable applications should use the Lob annotation when mapping to a database Lob type. The Lob annotation may be used in conjunction with the Basic annotation or the ElementCollection annotation when the element collection value is of basic type. A Lob may be either a binary or character type.

    The Lob type is inferred from the type of the persistent field or property, and except for string and character-based types defaults to Blob.

    
       Example 1:
    
       @Lob @Basic(fetch=LAZY)
       @Column(name="REPORT")
       protected String report;
    
       Example 2:
    
       @Lob @Basic(fetch=LAZY)
       @Column(name="EMP_PIC", columnDefinition="BLOB NOT NULL")
       protected byte[] pic;
    
     
    Since:
    Java Persistence 1.0
    See Also:
    Basic, ElementCollection

Document created the 11/06/2005, last modified the 18/08/2025
Source of the printed document:https://www.gaudry.be/en/java-api-javaee-rf-javax/persistence/Lob.html

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References

  1. View the html document Language of the document:fr Manuel PHP : https://docs.oracle.com/en/java/, Annotation Type Lob

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