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This is the property,
@Column( name = "description")
private String description;
This is MySql Table
During compiling this error is thrown,
Caused by: org.hibernate.tool.schema.spi.SchemaManagementException: Schema-validation: wrong column type encountered in column [description] in table [product]; found [longtext (Types#LONGVARCHAR)], but expecting [varchar(255) (Types#VARCHAR)]
What I am missing?
202
Hibernate can also map nationalized character data types, like NCHAR, NVARCHAR, LONGNVARCHAR, and NCLOB. To define such a mapping, you need to annotate your entity attribute of type String with Hibernate’s @Nationalized annotation instead of @Lob .
A Hibernate type is a bridge between an SQL type and a Java primitive/Object type. These are the types Hibernate supports by default: You can always define your own custom types as we will see in a future article.
It’s very important to understand the basic mapping rules for individual Entities before starting modelling Entity associations. A Hibernate type is a bridge between an SQL type and a Java primitive/Object type. These are the types Hibernate supports by default: You can always define your own custom types as we will see in a future article.
But Hibernate also needs to fetch all data stored in the LOB immediately and map it to a Java object. Depending on the size of your LOB, this can cause severe performance problems. If you, e.g., store large video files in your database, it’s often better to use JDBC’s LOB locators.
You can either modify the database:
ALTER TABLE product MODIFY description VARCHAR(255);
This simple ALTER TABLE command may fail if the description values are longer than 255 characters, so you may need to do it by creating a new column and transforming the values and dropping the original column.
Or you can adjust the Java code:
@Lob
@Column(name = "description", columnDefinition = "LONGTEXT")
private String description;
You can try to omit the columnDefinition first, it may be the default MySQL text LOB for Hibernate.
116
I used @Type (org.hibernate.annotations.Type;) and it worked:
`addresses` text CHARACTER SET utf8 COLLATE utf8_bin NULL DEFAULT NULL
@Column(columnDefinition = "text")
@Type(type = "text")
private String addresses;
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