REF value, which is a reference to an SQL structured type value in the database. SQL REF values are stored in a table that contains instances of a referenceable SQL structured type, and each REF value is a unique identifier for one instance in that table. An SQL REF value may be used in place of the SQL structured type it references, either as a column value in a table or an attribute value in a structured type.
Because an SQL REF value is a logical pointer to an SQL structured type, a Ref object is by default also a logical pointer. Thus, retrieving an SQL REF value as a Ref object does not materialize the attributes of the structured type on the client.
A Ref object can be stored in the database using the PreparedStatement.setRef method.
All methods on the Ref interface must be fully implemented if the JDBC driver supports the data type.
@see Struct
@since 1.2
A ref in Git is (more or less) a variable that holds a single object identifier. The object identifier can be any valid Git object (blob, tree, commit, annotated tag, ...).
The ref name has the attributes of the ref that was asked for as well as the ref it was resolved to for symbolic refs plus the object id it points to and (for tags) the peeled target object id, i.e. the tag resolved recursively until a non-tag object is referenced.
The following features are supported:
A ref in Git is (more or less) a variable that holds a single object identifier. The object identifier can be any valid Git object (blob, tree, commit, annotated tag, ...).
The ref name has the attributes of the ref that was asked for as well as the ref it was resolved to for symbolic refs plus the object id it points to and (for tags) the peeled target object id, i.e. the tag resolved recursively until a non-tag object is referenced.
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