Upgrade to a
READ_WRITEtransaction.
MCO_RET mco_trans_upgrade( /*INOUT*/ mco_trans_h t );
|
t |
The |
This function upgrades a
MCO_READ_ONLYorMCO_UPDATEtransaction toMCO_READ_WRITE.
| MCO_S_OK | The transaction was upgraded successfully |
|
MCO_E_UPGRADE_FAILED |
The transaction could not be upgraded. Another read thread has upgraded. Try again |
| MCO_ERR_TRN | A database transaction error occurred |
Application snippet:
const char * dbname = "SimpleDb";
int main(int argc, char* argv[])
{
mco_db_h db;
MCO_RET rc;
mco_device_t dev;
mco_db_params_t db_params;
mco_trans_h t;
...
rc = mco_db_open_dev( dbname, simple_get_dictionary(), &dev, 1, &db_params );
if ( MCO_S_OK != rc )
{
rc = mco_db_connect( dbname, &db );
...
rc = mco_trans_start(db, MCO_READ_ONLY, MCO_TRANS_FOREGROUND, &t);
if ( MCO_S_OK == rc )
{
...
rc = mco_trans_upgrade( t );
...
rc = mco_trans_commit( t );
...
}
}
...
}