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MySQL NDB Cluster API Developer Guide
Download this Manual ndb_mgm_check_connection()

Description.  This function can be used to determine whether a management server is running on a given connection from a management client.


int ndb_mgm_check_connection
      NdbMgmHandle handle

Parameters.  An NdbMgmHandle (see Section 3.1, “MGM API Concepts”).

Return value.  In NDB 7.5 and later, this function returns 0 on success, -1 when the handle is null, and -2 when not connected.

In NDB 7.4 and earlier, this function returned -1 in the event of an error; otherwise it returned 0, even when the management server handle was NULL, or when the connection check failed (Bug #53242, Bug #11760802).