public async Task DeleteRowsAsync(IPersistentCollection collection, object id, ISessionImplementor session, CancellationToken cancellationToken)
{
cancellationToken.ThrowIfCancellationRequested();
if (!isInverse && RowDeleteEnabled)
{
if (log.IsDebugEnabled())
{
log.Debug("Deleting rows of collection: {0}", MessageHelper.CollectionInfoString(this, collection, id, session));
}
bool deleteByIndex = !IsOneToMany && hasIndex && !indexContainsFormula;
try
{
// delete all the deleted entries
var offset = 0;
var count = 0;
foreach (var entry in await(collection.GetDeletesAsync(this, !deleteByIndex, cancellationToken)).ConfigureAwait(false))
{
DbCommand st;
var expectation = Expectations.AppropriateExpectation(deleteCheckStyle);
//var callable = DeleteCallable;
var commandInfo = GetDeleteCommand(deleteByIndex, entry, out var columnNullness);
var useBatch = expectation.CanBeBatched;
if (useBatch)
{
st = await(session.Batcher.PrepareBatchCommandAsync(
commandInfo.CommandType, commandInfo.Text, commandInfo.ParameterTypes, cancellationToken)).ConfigureAwait(false);
}
else
{
st = await(session.Batcher.PrepareCommandAsync(
commandInfo.CommandType, commandInfo.Text, commandInfo.ParameterTypes, cancellationToken)).ConfigureAwait(false);
}
try
{
var loc = offset;
if (hasIdentifier)
{
await(WriteIdentifierAsync(st, entry, loc, session, cancellationToken)).ConfigureAwait(false);
}
else
{
loc = await(WriteKeyAsync(st, id, loc, session, cancellationToken)).ConfigureAwait(false);
if (deleteByIndex)
{
await(WriteIndexToWhereAsync(st, entry, loc, session, cancellationToken)).ConfigureAwait(false);
}
else
{
await(WriteElementToWhereAsync(st, entry, columnNullness, loc, session, cancellationToken)).ConfigureAwait(false);
}
}
if (useBatch)
{
await(session.Batcher.AddToBatchAsync(expectation, cancellationToken)).ConfigureAwait(false);
}
else
{
expectation.VerifyOutcomeNonBatched(await(session.Batcher.ExecuteNonQueryAsync(st, cancellationToken)).ConfigureAwait(false), st);
}
count++;
}
catch (OperationCanceledException) { throw; }
catch (Exception e)
{
if (useBatch)
{
session.Batcher.AbortBatch(e);
}
throw;
}
finally
{
if (!useBatch)
{
session.Batcher.CloseCommand(st, null);
}
}
}
if (log.IsDebugEnabled())
{
if (count > 0)
{
log.Debug("done deleting collection rows: {0} deleted", count);
}
else
{
log.Debug("no rows to delete");
}
}
}
catch (DbException sqle)
{
throw ADOExceptionHelper.Convert(sqlExceptionConverter, sqle,
"could not delete collection rows: " + MessageHelper.CollectionInfoString(this, collection, id, session));
}
}
}