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MySQL NDB Cluster API Developer Guide
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2.3.26.13 NdbRecAttr::isNULL()

Description.  This method checks whether an attribute value is NULL.

Signature. 

int isNULL
    (
      void
    ) const

Parameters.  None.

Return value.  One of the following three values:

  • -1: The attribute value is not defined due to an error.

  • 0: The attribute value is defined, but is not NULL.

  • 1: The attribute value is defined and is NULL.

Important

In the event that NdbTransaction::execute() has not yet been called, the value returned by isNULL() is not determined.


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