public void Update(DbRow row)
{
if (rowBufferId != 0)
{
throw new ApplicationException("State error: previous table operation not completed");
}
// Check row is currently indexed,
long rowid = row.RowId;
IDataFile df = GetDataFile(rowIndexKey);
SortedIndex rows = new SortedIndex(df);
if (!rows.ContainsSortKey(rowid))
{
throw new ApplicationException("Row being updated is not in the table");
}
if (rowBuffer == null)
{
rowBuffer = new Dictionary <string, string>();
}
rowBufferId = rowid;
// Copy from the existing data in the row,
string[] cols = ColumnNames;
foreach (string col in cols)
{
string val = row.GetValue(col);
if (val != null)
{
rowBuffer[col] = val;
}
}
}
public int Delete(IEnumerator <DbRow> rows)
{
int deleteCount = 0;
while (rows.MoveNext())
{
DbRow row = rows.Current;
if (row == null)
{
continue;
}
long rowid = row.RowId;
IDataFile df = GetDataFile(rowIndexKey);
SortedIndex rowsIndex = new SortedIndex(df);
if (rowsIndex.ContainsSortKey(rowid))
{
// Remove the row from the main index,
RemoveRowFromRowSet(rowid);
// Remove the row from any indexes defined on the table,
RemoveRowFromIndexSet(rowid);
// Delete the row file
IDataFile rowFile = GetDataFile(GetRowIdKey(rowid));
rowFile.Delete();
// Add this event to the transaction log,
AddTransactionEvent("deleteRow", rowid);
deleteCount++;
}
}
++currentVersion;
return(deleteCount);
}
public void CheckTableDataDelete(String table, long rowid)
{
// Is it in the modification set?
if (tableDataChanged != null)
{
DbTable t;
if (tableDataChanged.TryGetValue(table, out t))
{
// Yes, so check if the given row in the modification set,
SortedIndex deleteSet = t.Deletes;
if (deleteSet.ContainsSortKey(rowid))
{
// Yes, so generate a commit fault,
throw new CommitFaultException(String.Format("Row in Table ''{0}'' was modified by a concurrent transaction",
table));
}
}
}
}
public void BeginUpdate(long rowid)
{
if (rowBufferId != 0)
{
throw new ApplicationException("State error: previous table operation not completed");
}
// Check row is currently indexed,
IDataFile df = GetDataFile(rowIndexKey);
SortedIndex rows = new SortedIndex(df);
if (!rows.ContainsSortKey(rowid))
{
throw new ApplicationException("Row being updated is not in the table");
}
if (rowBuffer == null)
{
rowBuffer = new Dictionary <string, string>();
}
rowBufferId = rowid;
}
public void Delete(DbRow row)
{
long rowid = row.RowId;
IDataFile df = GetDataFile(rowIndexKey);
SortedIndex rows = new SortedIndex(df);
if (!rows.ContainsSortKey(rowid))
{
throw new ApplicationException("Row being deleted is not in the table");
}
// Remove the row from the main index,
RemoveRowFromRowSet(rowid);
// Remove the row from any indexes defined on the table,
RemoveRowFromIndexSet(rowid);
// Delete the row file
IDataFile rowFile = GetDataFile(GetRowIdKey(rowid));
rowFile.Delete();
// Add this event to the transaction log,
AddTransactionEvent("deleteRow", rowid);
++currentVersion;
}
internal void PrepareForCommit()
{
// Write the transaction log for this table,
IDataFile df = GetDataFile(AddLog);
df.Delete();
SortedIndex addlist = new SortedIndex(df);
foreach (long v in addRowList)
{
addlist.InsertSortKey(v);
}
df = GetDataFile(RemoveLog);
df.Delete();
SortedIndex deletelist = new SortedIndex(df);
foreach (long v in deleteRowList)
{
if (addlist.ContainsSortKey(v))
{
addlist.RemoveSortKey(v);
}
else
{
deletelist.InsertSortKey(v);
}
}
// Set the id gen key
if (currentIdGen != -1)
{
StringDictionary p = TableProperties;
p.SetValue("k", currentIdGen);
}
}