org.apache.drill.metastore

Annotation Type MetastoreFieldDefinition

@Retention(value=RUNTIME)
 @Target(value=FIELD)
public @interface MetastoreFieldDefinition

Annotation used to determine to which metadata types Metastore units fields belong. Mainly used when obtaining field information using reflection. Only fields annotated with this annotation are considered to be part of component metadata unit, non-annotated fields will be ignored.

Required Element Summary

Required Elements

Modifier and Type	Required Element and Description
MetastoreColumn	column Indicates Metastore column which can be used in select or filter.
MetadataType[]	scopes Indicated metadata types to which field belongs to.

Element Detail

column

public abstract MetastoreColumn column

Indicates Metastore column which can be used in select or filter.

Returns:

column enum value

scopes

public abstract MetadataType[] scopes

Indicated metadata types to which field belongs to.

Returns:

array of metadata types field belongs to