internal Query(ConnectionsContext connectionsContext,
ExecutionPlanByServer executionPlanByServer,
int formatVersion)
{
_connectionsContext = connectionsContext;
_executionPlanByServer = executionPlanByServer;
FormatVersion = formatVersion;
}
public static Query Load(string path)
{
if (!File.Exists(path))
{
throw new FileNotFoundException(path);
}
int formatVersion;
string description;
HashSet <Connection> connections;
Metadatas metadata;
ExecutionPlanByServer executionPlanByServer;
FastAccessList <object> referenceTracking;
//using (var istream = new FileStream(path, FileMode.Open))
//using (var lzstream = new LZ4Stream(istream, CompressionMode.Decompress))
//using (var bstream = new BinaryReader(lzstream, Encoding.UTF8, true))
//{
// formatVersion = bstream.ReadInt32();
// description = bstream.ReadString();
// referenceTracking = DeserializeReferenceTracking(bstream);
// connections = DeserializeConnections(bstream);
// executionPlanByServer = ExecutionPlanByServer.Deserialize(bstream, referenceTracking);
// metadata = AppMetadata.Deserialize(bstream, referenceTracking);
//}
using (var istream = new FileStream(path, FileMode.Open))
using (var bstream = new BinaryReader(istream, Encoding.UTF8, true))
{
formatVersion = bstream.ReadInt32();
description = bstream.ReadString();
referenceTracking = DeserializeReferenceTracking(bstream);
connections = DeserializeConnections(bstream);
executionPlanByServer = ExecutionPlanByServer.Deserialize(bstream, referenceTracking);
metadata = Metadatas.Deserialize(bstream, referenceTracking);
}
//Initialize a connection context with values used at the time of the creation of the clone.
var connectionsContext = new ConnectionsContext();
connectionsContext.Initialize(connections.ToList(), metadata);
return(new Query(connectionsContext, executionPlanByServer, formatVersion)
{
Description = description
});
}
public ExecutionContext()
{
ConnectionsContext = new ConnectionsContext();
Map = new Dictionary <SehemaIdentifier, SehemaIdentifier>();
}
public static object[][] Select(this ConnectionsContext connectionsContext, RowIdentifier row)
{
var ctx = connectionsContext[row];
return(ctx.QueryProvider.Select(ctx.Connection, connectionsContext.Metadatas, row));
}
