Handle PostgreSQL transaction errors in GDALVectorTranslate - c++

Question

In c++ I'm using the GDAL library for importing geo-spatial files into Postgres/PostGIS.
The GDAL library will create a table in the Postgres database and insert the data. But I can't figure out how to handle errors during the inserting of data.
I'm using GDALVectorTranslate https://gdal.org/api/gdal_utils.html#gdal__utils_8h_1aa176ae667bc857ab9c6016dbe62166eb
If an Postgres error occurs the error text will be outputted and the program continues to run. I would like to handle these Postgres errors.
An error could be:
ERROR 1: INSERT command for new feature failed.
ERROR: invalid byte sequence for encoding "UTF8": 0xe5 0x20 0x46
For now I let my program count the rows in the destination table and if zero then assume error. But that doesn't work if appending to an existing table.
auto *dst = (GDALDataset *) GDALVectorTranslate(nullptr, pgDs, 1, &sourceDs, opt, &bUsageError);
if (dst == nullptr) {
std::cout << "ERROR! Couldn't create table" << std::endl;
return FALSE;
} else {
OGRLayer *layer = dst->GetLayerByName(altName);
// Here the rows are counted
if (layer->GetFeatureCount() == 0) {
std::cout << "ERROR! Insert failed" << std::endl;
return FALSE;
}
std::cout << " Imported";
return TRUE;
}

Answer 1

You can register your own error handler to log and count the underlying errors:
struct {/*members for handling errors*/} ctx;
static void myErrorHandler(CPLErr e, CPLErrorNum n, const char* msg) {
ctx *myctx = (ctx*)CPLGetErrorHandlerUserData();
/* do something with ctx to log and increment error count */
}
int myTranslateFunc() {
ctx myctx; //+initialization
CPLPushErrorHandlerEx(&myErrorHandler,&myctx);
auto *dst = (GDALDataset *) GDALVectorTranslate(nullptr, pgDs, 1, &sourceDs, opt, &bUsageError);
CPLPopErrorHandler();
//inspect myctx for potential errors
}