Embedding with JPA annot: column "is not compatible with expected type"

Question

I have the following embed case (things I guess to be inessential omitted):
@Entity
public class Container {
@Id
@GeneratedValue
@Column(name="ID")
private long id;
@Embedded
@AttributeOverride(name="value", column=@Column(name="UID"))
private Uid uid;
@Embeddable
public class Uid {
private String value;
When I run this through the mapping tool to build the schema, it correctly builds the UID column in the MySQL Agreement table as a VARCHAR.
However, when I try to access the table, I get the following error (I've edited class names to match my simplified example):
RROR_SYSTEM_FAILED:
<4|true|4.0.0> kodo.persistence.ArgumentException: "Uid.value" declares a column that is not compatible with the expected type "varchar". Column details:
Full Name: Agreement.UID
Type: blob
Size: 0
Default: null
Not Null: false
     at kodo.jdbc.meta.MappingInfo.mergeColumn(MappingInfo.java:720)
     at kodo.jdbc.meta.MappingInfo.createColumns(MappingInfo.java:567)
     at kodo.jdbc.meta.ValueMappingInfo.getColumns(ValueMappingInfo.java:143)
     at kodo.jdbc.meta.strats.StringFieldStrategy.map(StringFieldStrategy.java:52)
     at kodo.jdbc.meta.FieldMapping.setStrategy(FieldMapping.java:101)
     at kodo.jdbc.meta.RuntimeStrategyInstaller.installStrategy(RuntimeStrategyInstaller.java:75)
     at kodo.jdbc.meta.FieldMapping.resolveMapping(FieldMapping.java:497)
     at kodo.jdbc.meta.FieldMapping.resolve(FieldMapping.java:456)
     at kodo.jdbc.meta.ClassMapping.resolveNonRelationMappings(ClassMapping.java:930)
     at kodo.jdbc.meta.ClassMapping.resolveMapping(ClassMapping.java:886)
     at kodo.meta.ClassMetaData.resolve(ClassMetaData.java:1761)
     at kodo.jdbc.meta.ValueMappingImpl.resolve(ValueMappingImpl.java:541)
     at kodo.jdbc.meta.strats.EmbedFieldStrategy.map(EmbedFieldStrategy.java:62)
     at kodo.jdbc.meta.FieldMapping.setStrategy(FieldMapping.java:101)
     at kodo.jdbc.meta.RuntimeStrategyInstaller.installStrategy(RuntimeStrategyInstaller.java:75)
     at kodo.jdbc.meta.FieldMapping.resolveMapping(FieldMapping.java:497)
     at kodo.jdbc.meta.FieldMapping.resolve(FieldMapping.java:456)
     at kodo.jdbc.meta.ClassMapping.resolveMapping(ClassMapping.java:890)
     at kodo.meta.ClassMetaData.resolve(ClassMetaData.java:1761)
     at kodo.meta.MetaDataRepository.processBuffer(MetaDataRepository.java:683)
     at kodo.meta.MetaDataRepository.resolveMapping(MetaDataRepository.java:635)
     at kodo.meta.MetaDataRepository.resolve(MetaDataRepository.java:518)
     at kodo.meta.MetaDataRepository.getMetaData(MetaDataRepository.java:288)
     at kodo.meta.MetaDataRepository.getMetaData(MetaDataRepository.java:352)
     at kodo.kernel.QueryImpl.classForName(QueryImpl.java:1879)
     at kodo.kernel.ExpressionStoreQuery$1.classForName(ExpressionStoreQuery.java:74)
     at kodo.kernel.jpql.JPQLExpressionBuilder.getClassMetaData(JPQLExpressionBuilder.java:151)
     at kodo.kernel.jpql.JPQLExpressionBuilder.resolveClassMetaData(JPQLExpressionBuilder.java:119)
     at kodo.kernel.jpql.JPQLExpressionBuilder.getCandidateMetaData(JPQLExpressionBuilder.java:203)
     at kodo.kernel.jpql.JPQLExpressionBuilder.getCandidateMetaData(JPQLExpressionBuilder.java:176)
     at kodo.kernel.jpql.JPQLExpressionBuilder.getCandidateType(JPQLExpressionBuilder.java:167)
     at kodo.kernel.jpql.JPQLExpressionBuilder.access$500(JPQLExpressionBuilder.java:30)
===
I can't figure out why it thinks something should be a blob. Any thoughts?
Thanks,
-- Bryan Loofbourrow

Answer 1

Ok, I found the problem. I hadn't added the Uid.java to the persistence.xml file, so although the mapping tool correctly recognized this as a varchar situation, the execution environment did not, taking Uid to be a nonpersistent class that it must treat as a blob.
-- Bryan