public SqlObject GetValue(int columnOffset, RowId rowid)
{
if (rowid.ToInt64() != 0)
throw new ArgumentOutOfRangeException("rowid");
return values[columnOffset];
}
public TableRow GetRow(RowId rowid)
{
if (rowid.ToInt64() != 0)
throw new ArgumentOutOfRangeException("rowid");
if (row == null) {
row = new TableRow(this, new RowId(0));
for (int i = 0; i < columns.Count; i++)
row.SetValue(i, values[i]);
}
return row;
}
public TableRow GetRow(RowId rowid)
{
// Null value if the rowid is less than 0
if (rowid == null || rowid.ToInt64() < 0)
return null;
int sz = Columns.Count;
TableRow row = new TableRow(this, rowid);
for (int i = 0; i < sz; i++) {
int tableIndex = columns.IndexOfTable(i);
// Adjust the column to the table the column is located
int tableColumn = columns.AdjustColumn(i);
// Adjust the row by the table
RowId tableRow = AdjustRow(rowid.ToInt64(), tableIndex);
// Fetch and return the data
SqlObject value = tables[tableIndex].GetValue(tableColumn, tableRow);
TableColumn column = Columns[i];
row.SetValue(column.Offset, value);
}
return row;
}
public bool RowExists(RowId rowid)
{
return rowid.ToInt64() == 0;
}
public TableRow GetRow(RowId rowid)
{
if (rowid.ToInt64() != 0)
return null;
return currentRow;
}
public void Delete(RowId rowid)
{
if (rowid.ToInt64() != 0)
throw new ArgumentException();
queryString = null;
parameters.Clear();
currentRow = null;
rowCount--;
}
public SqlObject GetValue(int columnOffset, RowId rowid)
{
int tableIndex = columns.IndexOfTable(columnOffset);
// Adjust the column to the table the column is located
int tableColumn = columns.AdjustColumn(columnOffset);
// Adjust the row by the table
RowId tableRow = AdjustRow(rowid.ToInt64(), tableIndex);
// Fetch and return the data
return tables[tableIndex].GetValue(tableColumn, tableRow);
}
public bool RowExists(RowId rowid)
{
return rowid.ToInt64() > 0 && rowid.ToInt64() < RowCount;
}
public void PrefetchValue(int columnOffset, RowId rowid)
{
if (rowid == null || rowid.ToInt64() < 0)
return;
if (columnOffset == -1) {
for (int i = 0; i < tables.Length; ++i) {
tables[i].PrefetchValue(-1, AdjustRow(rowid.ToInt64(), i));
}
} else {
int tableIndex = columns.IndexOfTable(columnOffset);
// Adjust the column to the table the column is located
int tableColumn = columns.AdjustColumn(columnOffset);
// Adjust the row by the table
RowId tableRow = AdjustRow(rowid.ToInt64(), tableIndex);
// Delegate the hint to the parent table
tables[tableIndex].PrefetchValue(tableColumn, tableRow);
}
}
