MySQL NDB Cluster API Developer Guide NdbEventOperation::getPreValue()

Description.  This method performs identically to getValue(), except that it is used to define a retrieval operation of an attribute's previous value rather than the current value. See Section, “NdbEventOperation::getValue()”, for details.


NdbRecAttr* getPreValue
      const char* name,
      char*       value = 0

Parameters.  This method takes the two parameters listed here:

Return value.  An NdbRecAttr object to hold the value of the attribute, or a NULL pointer indicating that an error has occurred.