public Row LoadRow(Id tableName, DbPtr ptr)
{
using var tManager = new TableFileManager(new FileStream(GetTableFileName(tableName), FileMode.Open, FileAccess.Read, FileShare.ReadWrite, 4096));
var block = tManager.LoadDataBlock(ptr.FilePtrBlock);
var row = block.LoadRowRecord(ptr.InBlockPos, tManager.RowRecordSize);
return(row.Fields);
}
public OperationResult <string> AddTable(Table table)
{
_ = table ?? throw new ArgumentNullException(nameof(table));
if (File.Exists(GetTableFileName(table.TableMetaInf.Name)))
{
return(new OperationResult <string>(ExecutionState.failed, null, new TableNotExistError(FullTableName(table.TableMetaInf.Name))));
}
using var tManager = new TableFileManager(new FileStream(GetTableFileName(table.TableMetaInf.Name), FileMode.Create), table, _blockSize);
return(new OperationResult <string>(ExecutionState.performed, ""));
}
public OperationResult <Table> LoadTable(Id tableName)
{
if (!File.Exists(GetTableFileName(tableName)))
{
return(new OperationResult <Table>(ExecutionState.failed, null, new TableNotExistError(FullTableName(tableName))));
}
Table table;
using (var tManager = new TableFileManager(new FileStream(GetTableFileName(tableName), FileMode.Open, FileAccess.Read, FileShare.ReadWrite, 4096)))
{
table = tManager.LoadTable();
table.TableData = new DataStorageRowsInFiles(GetTableFileName(tableName));
}
return(new OperationResult <Table>(ExecutionState.performed, table));
}
public OperationResult <Tuple <long, long> > InsertRow(Id tableName, Row fields)
{
if (!File.Exists(GetTableFileName(tableName)))
{
return(new OperationResult <Tuple <long, long> >(ExecutionState.failed, new Tuple <long, long>(0, 0), new TableNotExistError(FullTableName(tableName))));
}
using var manager = new TableFileManager(new FileStream(GetTableFileName(tableName), FileMode.Open, FileAccess.ReadWrite, FileShare.Read, 4096));
var rowRecord = new RowRecord(fields);
manager.InsertRecord(rowRecord);
return(new OperationResult <Tuple <long, long> >(ExecutionState.performed, new Tuple <long, long>(manager.readCount, manager.writeCount)));
}
public OperationResult <Tuple <long, long> > UpdateAllRow(Id tableName, Row newRow, Predicate <Row> match)
{
if (!File.Exists(GetTableFileName(tableName)))
{
return(new OperationResult <Tuple <long, long> >(ExecutionState.failed, new Tuple <long, long>(0, 0), new TableNotExistError(FullTableName(tableName))));
}
using var manager = new TableFileManager(new FileStream(GetTableFileName(tableName), FileMode.Open, FileAccess.ReadWrite, FileShare.Read, 4096));
using var tableData = new DataStorageRowsInFilesEnumerator(manager);
var isnLast = tableData.MoveNext();
while (isnLast)
{
isnLast = match(tableData.Current) ? tableData.UpdateCurrentRow(newRow) : tableData.MoveNext();
}
return(new OperationResult <Tuple <long, long> >(ExecutionState.performed, new Tuple <long, long>(manager.readCount, manager.writeCount)));
}
public DataStorageRowsInFilesEnumerator(TableFileManager tManager)
{
_tManager = tManager;
Reset();
}
public TableFileManagerDataBlockNodeEnumerator(TableFileManager tManager_)
{
_tManager = tManager_;
Reset();
}
