The MySQL Cluster API Developers' Guide :: 4 NDB API Classes, Interfaces, and Structures :: 4.9 The NdbBlob Class :: 4.9.2 NdbBlob Methods :: 4.9.2.6 NdbBlob::getNull()
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- 4.9.2 NdbBlob Methods
- 4.9.2.1 NdbBlob::getState()
- 4.9.2.2 NdbBlob::getValue()
- 4.9.2.3 NdbBlob::setValue()
- 4.9.2.4 NdbBlob::setActiveHook()
- 4.9.2.5 NdbBlob::getVersion()
- 4.9.2.6 NdbBlob::getNull()
- 4.9.2.7 NdbBlob::setNull()
- 4.9.2.8 NdbBlob::getLength()
- 4.9.2.9 NdbBlob::truncate()
- 4.9.2.10 NdbBlob::getPos()
- 4.9.2.11 NdbBlob::setPos()
- 4.9.2.12 NdbBlob::readData()
- 4.9.2.13 NdbBlob::writeData()
- 4.9.2.14 NdbBlob::getColumn()
- 4.9.2.15 NdbBlob::getNdbError()
- 4.9.2.16 NdbBlob::blobsFirstBlob()
- 4.9.2.17 NdbBlob::blobsNextBlob()
- 4.9.2.18 NdbBlob::getBlobEventName()
- 4.9.2.19 NdbBlob::getBlobTabletName()
Description.
This method checks whether the blob's value is
NULL.
Signature.
int getNull
(
int& isNull
)
Parameters.
A reference to an integer isNull.
Following invocation, this parameter has one of the following
values, interpreted as shown here:
-1: The blob is undefined. If this is a non-event blob, this result causes a state error.0: The blob has a non-null value.1: The blob's value isNULL.
Return Value. None.
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