2.3.22 The NdbRecord Interface

This section provides information about the NdbRecord interface.

Decription: NdbRecord is an interface which provides a mapping to a full or a partial record stored in NDB. In the latter case, it can be used in conjunction with a bitmap to assist in access.
Parent: None.
Methods: None.
Types: None.

NdbRecord has no API methods of its own; rather, it acts as a handle that can be passed between various method calls for use in many different sorts of operations, including the following:

Unique key reads and primary key reads
Table scans and index scans
DML operations involving unique keys or primary keys
Operations involving index bounds

The same NdbRecord can be used simultaneously in multiple operations, transactions, and threads.

An NdbRecord can be created in NDB API programs by calling Dictionary::createRecord(). In addition, a number of NDB API methods have additional declarations that enable the programmer to leverage NdbRecord:

The following members of NdbIndexScanOperation and NdbDictionary can also be used with NdbRecord scans:

IndexBound is a structure used to describe index scan bounds.
RecordSpecification is a structure used to specify columns and range offsets.

You can also use NdbRecord in conjunction with the PartitionSpec structure to perform scans that take advantage of partition pruning, using NdbIndexScanOperation::setBound().