open( parameter list )

Open the SQL engine with a list of parameters.

Prototype

 
    void open(char const* name, 
            mco_dictionary_h dictionary, 
            size_t size,
            size_t pageSize = 128,
            void* mapAddress = MCO_DATABASE_DEFAULT_MAP_ADDRESS,
            size_t maxTransSize = 0,
            int flags = McoSqlOpenParameters::DEFAULT_OPEN_FLAGS,
            char const* databaseFile = NULL,
            size_t maxClasses = 100, 
            size_t maxIndexes = 100, 
            size_t maxDictionarySize = 16*1024);
 

Arguments

name	The database name
dictionary	A handle to the dictionary that was created by the eXtremeDB schema compiler mcocomp. Normally, this handle is passed in by dbname_get_dictionary ()
size	The eXtremeDB database size (in bytes)
pageSize	The eXtremeDB in-memory page size (in bytes)
mapAddress	The eXtremeDB map address (for a shared memory database)
maxTransSize	The maximum number of objects per transaction
flags	Optional open flags (see OpenFlags enum in McoSqlOpenParameters)
databaseFile	A database file to be loaded
maxClasses	The maximum number of classes
maxIndexes	The maximum number of indexes
maxDictionarySize	The maximum size of the total dictionary

Description

This method opens an eXtremeDB database, an eXtremeDB SQL mapper and the McoSqlEngine instance with the list of parameters specified.

Returns

This method throws a RuntimeException in the case of an error.

Example

     
    const char * dbname = "SimpleDb";
     
    int main(int argc, char* argv[])
    {
        MCO_RET rc;
        McoSqlEngine engine;
         
        ...
        engine.open( db_name, SimpleDb_get_dictionary(), DATABASE_SIZE, MEMORY_PAGE_SIZE);
            
        ...
    }