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Used in testing and debugging only. 

• ndbinfo_offline 

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Place the ndbinfo  database into offline mode, in which tables and views can be opened even when they do not actually exist, or when they exist but have different definitions in NDB . No rows are returned from such tables (or views). 

• ndbinfo_show_hidden 

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Whether or not the ndbinfo  database’s underlying internal tables are shown in the mysql  client. The default is OFF . 

• ndbinfo_table_prefix 

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The prefix used in naming the ndbinfo database’s base tables (normally hidden, unless exposed by setting ndbinfo_show_hidden ). This is a read-only variable whose default value is ndb$ ; the prefix itself is determined at compile time. 

