protected void CheckCurrentCommand()
{
if (_commandBuilder.ParameterCount >= _driver.SqlDialect.MaxParamCount)
{
FinalizeCurrentCommand();
_commandBuilder = new DataCommandBuilder(_driver, batchMode: true, mode: SqlGenMode.PreferLiteral);
}
}
private object ExecuteLinqNonQuery(EntitySession session, LinqCommand command, DataConnection conn)
{
var sql = SqlFactory.GetLinqSql(command);
var fmtOptions = command.Options.IsSet(QueryOptions.NoParameters) ?
SqlGenMode.NoParameters : SqlGenMode.PreferParam;
var cmdBuilder = new DataCommandBuilder(this._driver);
cmdBuilder.AddLinqStatement(sql, command.ParamValues);
var dataCmd = cmdBuilder.CreateCommand(conn, DbExecutionType.NonQuery, sql.ResultProcessor);
ExecuteDataCommand(dataCmd);
return(dataCmd.ProcessedResult ?? dataCmd.Result);
}
public object ExecuteLinqSelect(EntitySession session, LinqCommand command, DataConnection conn)
{
var sql = SqlFactory.GetLinqSql(command);
var genMode = command.Options.IsSet(QueryOptions.NoParameters) ?
SqlGenMode.NoParameters : SqlGenMode.PreferParam;
var cmdBuilder = new DataCommandBuilder(this._driver, batchMode: false, mode: genMode);
cmdBuilder.AddLinqStatement(sql, command.ParamValues);
var dataCmd = cmdBuilder.CreateCommand(conn, DbExecutionType.Reader, sql.ResultProcessor);
ExecuteDataCommand(dataCmd);
return(dataCmd.ProcessedResult);
}
private void SaveTableGroupRecordsOneByOne(DbUpdateTableGroup tableGrp, DataConnection conn, DbUpdateSet updateSet)
{
foreach (var rec in tableGrp.Records)
{
if (updateSet.InsertsIdentity && rec.EntityInfo.Flags.IsSet(EntityFlags.ReferencesIdentity))
{
rec.RefreshIdentityReferences();
}
var cmdBuilder = new DataCommandBuilder(this._driver);
var sql = SqlFactory.GetCrudSqlForSingleRecord(tableGrp.Table, rec);
cmdBuilder.AddRecordUpdate(sql, rec);
var cmd = cmdBuilder.CreateCommand(conn, sql.ExecutionType, sql.ResultProcessor);
ExecuteDataCommand(cmd);
}
}
public DbBatch Build(DbUpdateSet updateSet)
{
_batch = new DbBatch()
{
UpdateSet = updateSet
};
_commandBuilder = new DataCommandBuilder(_driver, batchMode: true, mode: SqlGenMode.PreferLiteral);
AddScheduledCommands(updateSet.Session.ScheduledCommandsAtStart);
foreach (var group in updateSet.UpdateGroups)
{
foreach (var tableGroup in group.TableGroups)
{
AddUpdateGroup(tableGroup);
}// foreach group
}
AddScheduledCommands(updateSet.Session.ScheduledCommandsAtEnd);
FinalizeCurrentCommand(completed: true);
return(_batch);
}
private void SaveChangesNoBatch(DbUpdateSet updateSet)
{
var session = updateSet.Session;
var conn = updateSet.Connection;
var withTrans = conn.DbTransaction == null && updateSet.UseTransaction;
try {
LogComment(session, "-- SaveChanges starting, {0} records ------------", updateSet.Records.Count);
var start = _timeService.ElapsedMilliseconds;
if (withTrans)
{
conn.BeginTransaction(commitOnSave: true);
}
//execute commands
ExecuteScheduledCommands(conn, session, session.ScheduledCommandsAtStart);
//Apply record updates
foreach (var grp in updateSet.UpdateGroups)
{
foreach (var tableGrp in grp.TableGroups)
{
switch (tableGrp.Operation)
{
case LinqOperation.Insert:
if (CanProcessMany(tableGrp))
{
var cmdBuilder = new DataCommandBuilder(this._driver, mode: SqlGenMode.PreferLiteral);
var sql = SqlFactory.GetCrudInsertMany(tableGrp.Table, tableGrp.Records, cmdBuilder);
cmdBuilder.AddInsertMany(sql, tableGrp.Records);
var cmd = cmdBuilder.CreateCommand(conn, sql.ExecutionType, sql.ResultProcessor);
ExecuteDataCommand(cmd);
}
else
{
SaveTableGroupRecordsOneByOne(tableGrp, conn, updateSet);
}
break;
case LinqOperation.Update:
SaveTableGroupRecordsOneByOne(tableGrp, conn, updateSet);
break;
case LinqOperation.Delete:
if (CanProcessMany(tableGrp))
{
var cmdBuilder = new DataCommandBuilder(this._driver);
var sql = SqlFactory.GetCrudDeleteMany(tableGrp.Table);
cmdBuilder.AddDeleteMany(sql, tableGrp.Records, new object[] { tableGrp.Records });
var cmd = cmdBuilder.CreateCommand(conn, DbExecutionType.NonQuery, sql.ResultProcessor);
ExecuteDataCommand(cmd);
}
else
{
SaveTableGroupRecordsOneByOne(tableGrp, conn, updateSet);
}
break;
}
} //foreach tableGrp
}
//Execute scheduled commands
ExecuteScheduledCommands(conn, session, session.ScheduledCommandsAtEnd);
if (conn.DbTransaction != null && conn.Flags.IsSet(DbConnectionFlags.CommitOnSave))
{
conn.Commit();
}
var end = _timeService.ElapsedMilliseconds;
LogComment(session, "-- SaveChanges completed. Records: {0}, Time: {1} ms. ------------",
updateSet.Records.Count, end - start);
ReleaseConnection(conn);
} catch {
ReleaseConnection(conn, inError: true);
throw;
}
}
