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MySQL NDB Cluster API Developer Guide
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2.3.39.4 Undofile::getLogfileGroupId()

Description.  This method retrieves the ID of the log file group to which the undo file belongs.

Note

It is also possible to obtain the name of the log file group directly. See Section 2.3.39.3, “Undofile::getLogfileGroup()”

Signature. 

Uint32 getLogfileGroupId
    (
      void
    ) const

Parameters.  None.

Return value.  The ID of the log file group, as an unsigned 32-bit integer.