public static IList <IDataReader> GetShardingDataReaderList(IList <Statement> statements)
{
var dataReaders = new List <Func <IDataReader> >();
for (Int32 i = 0; i < statements.Count; i++)
{
Statement statement = statements[i];
dataReaders.Add(() => DatabaseBridge.Instance.ExecuteReader(statement));
}
return(ExecuteParallelHelper.ParallelExcuter(dataReaders, CheckSameShard(statements)));
}
private static IList <DataSet> GetShardingDataSetList(IList <Statement> statements)
{
var dataSets = new List <Func <DataSet> >();
for (Int32 i = 0; i < statements.Count; i++)
{
Statement statement = statements[i];
dataSets.Add(() => DatabaseBridge.Instance.ExecuteDataSet(statement));
}
return(ExecuteParallelHelper.ParallelExcuter(dataSets, CheckSameShard(statements)));
}
public static IList <object> ExecuteShardingScalar(IList <Statement> statements)
{
if (statements == null || statements.Count == 0)
{
return(null);
}
var funcs = new List <Func <object> >();
for (Int32 i = 0; i < statements.Count; i++)
{
Statement statement = statements[i];
funcs.Add(() => DatabaseBridge.Instance.ExecuteScalar(statement));
}
return(ExecuteParallelHelper.ParallelExcuter(funcs, CheckSameShard(statements)));
}
/// <summary>
/// 表结构均相同, 只有一个数据库，将一个表分为多个名称不同的表
/// </summary>
/// <param name="statements"></param>
/// <returns></returns>
public static DataTable ExecuteShardTable(IList <Statement> statements)
{
if (statements == null || statements.Count == 0)
{
return(null);
}
var excuter = new List <Func <IDataReader> >();
for (Int32 i = 0; i < statements.Count; i++)
{
Statement statement = statements[i];
excuter.Add(() => DatabaseBridge.Instance.ExecuteReader(statement));
}
var result = ExecuteParallelHelper.ParallelExcuter(excuter, CheckSameShard(statements));
return(MergeDataReader(result));
}
