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    MySQL 9.5.0
    
   Source Code Documentation 
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Functions | |
| bool | is_sysvar_defined (const char *name) | 
| Return true if the named sysvar has been defined in the server.  More... | |
| bool is_sysvar_defined | ( | const char * | name | ) | 
Return true if the named sysvar has been defined in the server.
| true | The sysvar is defined. | 
| false | Otherwise. |