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 ReplicateTo(IDataFile destFile)
{
// TODO: Placeholder implementation,
destFile.Position = 0;
destFile.Delete();
Position = 0;
CopyTo(destFile, Length);
}
internal static void WriteForcedTransactionIntroduction(ITransaction transaction)
{
// Output the change log to the proposed transaction to commit,
IDataFile transactionLog = transaction.GetFile(TransactionLogKey, FileAccess.ReadWrite);
transactionLog.Delete();
StringData logFile = new StringData(transactionLog);
// Record that there is no base root for this transaction,
logFile.Append("no base root");
logFile.Append("\n");
}
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);
}
}
internal void RefreshTransactionLog()
{
// Output the change log to the proposed transaction to commit,
IDataFile transactionLog = transaction.GetFile(TransactionLogKey, FileAccess.ReadWrite);
transactionLog.Delete();
StringData logFile = new StringData(transactionLog);
// Record the base root in the log,
logFile.Append(baseRoot.ToString());
logFile.Append("\n");
// Write out every log entry,
foreach (string entry in log)
{
logFile.Append(entry);
logFile.Append("\n");
}
}
public void RemoveIndex(string columnName)
{
CheckColumnNameValid(columnName);
StringDictionary p = TableProperties;
// Check the column name index property,
if (!p.GetValue(columnName + ".index", false))
{
throw new ApplicationException("Column " + columnName + " not indexed");
}
long columnid = p.GetValue(columnName + ".id", -1);
if (columnid == -1)
{
// For this error to occur here would indicate some sort of data model
// corruption.
throw new ApplicationException("Column " + columnName + " not found");
}
// Remove from the index column list
string columnList = p.GetValue("index_column_list", "");
columnList = RemoveFromColumnSet(columnName, columnList);
p.SetValue("index_column_list", columnList);
// Remove the index property,
p.SetValue(columnName + ".index", null);
p.SetValue(columnName + ".collator", null);
// Delete the index file,
IDataFile indexFile = GetDataFile(GetIndexIdKey(columnid));
indexFile.Delete();
cachedIndexList = null;
// Add this event to the transaction log,
AddTransactionEvent("removeIndex", columnName);
++currentVersion;
}
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;
}
public void ReplicateTo(IDataFile destFile)
{
// TODO: Placeholder implementation,
destFile.Position = 0;
destFile.Delete();
Position = 0;
CopyTo(destFile, Length);
}
