DBtransactionStart |
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To take down beginning with changes in the log file. Moskito puts in to every Workfile *.wf a transaction log *.tr. In this file all changes in the Workfile are carried along. As soon as a transaction is finished, the log file is physically written. After successful securing of the Workfiles at the end of a Moskito's meeting the log file is removed. If Moskito hits by the start on an available log file, Moskito has broken off before. And the Workfileinhalt is reconstructed with the help of the last valid transaction. Every transaction can be cancelled about access functions and be restored. A transaction is begun with this function in the log file. Taking the minutes happens as follows: First a new entry is generated with DBtransactionStart in the log file. Then there follow one or several functions which change the contents of the data bank. In the end becomes DBtransactionEnd called, which writes the change protocol in the log file. Parametre root (PROOT) [IN] Act on the open data bank. Result (long int) [OUT] If exists no log file the size of the written changes becomes 0 zurückgeliefert, otherwise in the log file. Declaration #include "database.h"
long int DLLENTRY DBtransactionStart ( PROOT root ); Related functions DBtransactionSetUndoImpossible
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