/// <summary>
/// Query datas
/// </summary>
/// <typeparam name="T">Data type</typeparam>
/// <param name="server">Database server</param>
/// <param name="command">Command</param>
/// <returns>Return datas</returns>
public async Task <IEnumerable <T> > QueryAsync <T>(DatabaseServer server, ICommand command)
{
if (command.Query == null)
{
throw new EZNEWException("ICommand.Query is null");
}
#region query translate
IQueryTranslator translator = SqlServerFactory.GetQueryTranslator(server);
var tranResult = translator.Translate(command.Query);
string preScript = tranResult.PreScript;
string joinScript = tranResult.AllowJoin ? tranResult.JoinScript : string.Empty;
#endregion
#region script
string cmdText;
switch (command.Query.QueryType)
{
case QueryCommandType.Text:
cmdText = tranResult.ConditionString;
break;
case QueryCommandType.QueryObject:
default:
int size = command.Query.QuerySize;
string objectName = DataManager.GetEntityObjectName(DatabaseServerType.SQLServer, command.EntityType, command.ObjectName);
string orderString = string.IsNullOrWhiteSpace(tranResult.OrderString) ? string.Empty : $"ORDER BY {tranResult.OrderString}";
var queryFields = SqlServerFactory.GetQueryFields(command.Query, command.EntityType, true);
string outputFormatedField = string.Join(",", SqlServerFactory.FormatQueryFields(translator.ObjectPetName, queryFields, true));
if (string.IsNullOrWhiteSpace(tranResult.CombineScript))
{
cmdText = $"{preScript}SELECT {(size > 0 ? $"TOP {size}" : string.Empty)} {outputFormatedField} FROM {SqlServerFactory.WrapKeyword(objectName)} AS {translator.ObjectPetName} {joinScript} {(string.IsNullOrWhiteSpace(tranResult.ConditionString) ? string.Empty : $"WHERE {tranResult.ConditionString}")} {orderString}";
}
/// <summary>
/// Execute command
/// </summary>
/// <param name="server">Server</param>
/// <param name="executeOption">Execute option</param>
/// <param name="commands">Commands</param>
/// <returns>Return effect data numbers</returns>
public async Task <int> ExecuteAsync(DatabaseServer server, CommandExecuteOptions executeOption, IEnumerable <ICommand> commands)
{
#region group execute commands
IQueryTranslator translator = SqlServerFactory.GetQueryTranslator(server);
List <DatabaseExecuteCommand> executeCommands = new List <DatabaseExecuteCommand>();
var batchExecuteConfig = DataManager.GetBatchExecuteConfiguration(server.ServerType) ?? BatchExecuteConfiguration.Default;
var groupStatementsCount = batchExecuteConfig.GroupStatementsCount;
groupStatementsCount = groupStatementsCount < 0 ? 1 : groupStatementsCount;
var groupParameterCount = batchExecuteConfig.GroupParametersCount;
groupParameterCount = groupParameterCount < 0 ? 1 : groupParameterCount;
StringBuilder commandTextBuilder = new StringBuilder();
CommandParameters parameters = null;
int statementsCount = 0;
bool forceReturnValue = false;
int cmdCount = 0;
DatabaseExecuteCommand GetGroupExecuteCommand()
{
var executeCommand = new DatabaseExecuteCommand()
{
CommandText = commandTextBuilder.ToString(),
CommandType = CommandType.Text,
ForceReturnValue = forceReturnValue,
Parameters = parameters
};
statementsCount = 0;
translator.ParameterSequence = 0;
commandTextBuilder.Clear();
parameters = null;
forceReturnValue = false;
return(executeCommand);
}
foreach (var cmd in commands)
{
DatabaseExecuteCommand executeCommand = GetExecuteDbCommand(translator, cmd as RdbCommand);
if (executeCommand == null)
{
continue;
}
//Trace log
SqlServerFactory.LogExecuteCommand(executeCommand);
cmdCount++;
if (executeCommand.PerformAlone)
{
if (statementsCount > 0)
{
executeCommands.Add(GetGroupExecuteCommand());
}
executeCommands.Add(executeCommand);
continue;
}
commandTextBuilder.AppendLine(executeCommand.CommandText);
parameters = parameters == null ? executeCommand.Parameters : parameters.Union(executeCommand.Parameters);
forceReturnValue |= executeCommand.ForceReturnValue;
statementsCount++;
if (translator.ParameterSequence >= groupParameterCount || statementsCount >= groupStatementsCount)
{
executeCommands.Add(GetGroupExecuteCommand());
}
}
if (statementsCount > 0)
{
executeCommands.Add(GetGroupExecuteCommand());
}
#endregion
return(await ExecuteCommandAsync(server, executeOption, executeCommands, executeOption?.ExecuteByTransaction ?? cmdCount > 1).ConfigureAwait(false));
}
