- 2.3 NDB API Classes, Interfaces, and Structures
- 2.3.1 The Column Class
- 2.3.2 The Datafile Class
- 2.3.3 The Dictionary Class
- 2.3.4 The Event Class
- 2.3.5 The Index Class
- 2.3.6 The LogfileGroup Class
- 2.3.7 The List Class
- 2.3.8 The Ndb Class
- 2.3.9 The NdbBlob Class
- 2.3.10 The NdbDictionary Class
- 2.3.11 The NdbEventOperation Class
- 2.3.12 The NdbIndexOperation Class
- 2.3.13 The NdbIndexScanOperation Class
- 2.3.14 The NdbInterpretedCode Class
- 2.3.15 The NdbOperation Class
- 2.3.16 The NdbRecAttr Class
- 2.3.17 The NdbScanFilter Class
- 2.3.18 The NdbScanOperation Class
- 2.3.19 The NdbTransaction Class
- 2.3.20 The Object Class
- 2.3.21 The Table Class
- 2.3.22 The Tablespace Class
- 2.3.23 The Undofile Class
- 2.3.24 The Ndb_cluster_connection Class
- 2.3.25 The NdbRecord Interface
- 2.3.26 The AutoGrowSpecification Structure
- 2.3.27 The Element Structure
- 2.3.28 The GetValueSpec Structure
- 2.3.29 The IndexBound Structure
- 2.3.30 The Key_part_ptr Structure
- 2.3.31 The NdbError Structure
- 2.3.32 The OperationOptions Structure
- 2.3.33 The PartitionSpec Structure
- 2.3.34 The RecordSpecification Structure
- 2.3.35 The ScanOptions Structure
- 2.3.36 The SetValueSpec Structure
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.
NdbRecord is available beginning with MySQL
Cluster NDB 6.2.3.
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 these:
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 the createRecord() method of the
NdbDictionary class. In addition, a number of NDB
API methods have additional declarations in MySQL Cluster NDB 6.2.3
and later MySQL Cluster releases that allow the programmer to
leverage NdbRecord:
In addition, new members of NdbIndexScanOperation
and NdbDictionary are introduced in MySQL Cluster
NDB 6.2.3 for use with NdbRecord scans:
NdbIndexScanOperation::IndexBoundis a structure used to describe index scan bounds. See Section 2.3.29, “TheIndexBoundStructure”.NdbDictionary::RecordSpecificationis a structure used to specify columns and range offsets. See Section 2.3.34, “TheRecordSpecificationStructure”.
Beginning with MySQL Cluster NDB 6.3.24 and MySQL Cluster NDB 7.0.4,
you can also use NdbRecord in conjunction with
the new Ndb::PartitionSpec structure to perform
scans that take advantage of partition pruning, by means of a new
variant of NdbIndexScanOperation::setBound(). For
more information, see
Section 2.3.13.2.5, “NdbIndexScanOperation::setBound”, and
Section 2.3.33, “The PartitionSpec Structure”.
