- 4 NDB API Classes, Interfaces, and Structures
- 4.1 The Column Class
- 4.2 The Datafile Class
- 4.3 The Dictionary Class
- 4.4 The Event Class
- 4.5 The Index Class
- 4.6 The LogfileGroup Class
- 4.7 The List Class
- 4.8 The Ndb Class
- 4.9 The NdbBlob Class
- 4.10 The NdbDictionary Class
- 4.11 The NdbEventOperation Class
- 4.12 The NdbIndexOperation Class
- 4.13 The NdbIndexScanOperation Class
- 4.14 The NdbOperation Class
- 4.15 The NdbRecAttr Class
- 4.16 The NdbScanFilter Class
- 4.17 The NdbScanOperation Class
- 4.18 The NdbTransaction Class
- 4.19 The Object Class
- 4.20 The Table Class
- 4.21 The Tablespace Class
- 4.22 The Undofile Class
- 4.23 The Ndb_cluster_connection Class
- 4.24 The NdbRecord Interface
- 4.25 The AutoGrowSpecification Structure
- 4.26 The Element Structure
- 4.27 The IndexBound Structure
- 4.28 The NdbError Structure
- 4.29 The RecordSpecification 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 NDB 6.x 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 4.27, “TheIndexBoundStructure”.NdbDictionary::RecordSpecificationis a structure used to specify columns and range offsets. See Section 4.29, “TheRecordSpecificationStructure”.