/// <summary>
/// Updates this record values.
/// </summary>
/// <param name="rowValues">Row new values.</param>
private void UpdateRecord(object[] rowValues)
{
bool unlock = true;
// Table is already locked, don't lock it
if (m_pOwnerDb.TableLocked)
{
unlock = false;
}
else
{
m_pOwnerDb.LockTable(15);
}
// Create new record
byte[] rowData = LDB_Record.CreateRecord(m_pOwnerDb, rowValues);
DataPage[] dataPages = this.DataPages;
// Clear old data ?? do we need that
// for(int i=0;i<dataPages.Length;i++){
// dataPages[i].Data = new byte[1000];
// }
// We haven't enough room to store row, get needed data pages
if ((int)Math.Ceiling(rowData.Length / (double)m_pOwnerDb.DataPageDataAreaSize) > dataPages.Length)
{
int dataPagesNeeded = (int)Math.Ceiling(rowData.Length / (double)m_pOwnerDb.DataPageDataAreaSize) - dataPages.Length;
DataPage[] additionalDataPages = m_pOwnerDb.GetDataPages(dataPages[dataPages.Length - 1].Pointer, dataPagesNeeded);
// Append new data pages to existing data pages chain
dataPages[dataPages.Length - 1].NextDataPagePointer = additionalDataPages[0].Pointer;
DataPage[] newVal = new DataPage[dataPages.Length + additionalDataPages.Length];
Array.Copy(dataPages, 0, newVal, 0, dataPages.Length);
Array.Copy(additionalDataPages, 0, newVal, dataPages.Length, additionalDataPages.Length);
dataPages = newVal;
}
// Store new record
DbFile.StoreDataToDataPages(m_pOwnerDb.DataPageDataAreaSize, rowData, dataPages);
// Update row info
ParseRowInfo();
if (unlock)
{
m_pOwnerDb.UnlockTable();
}
}
/// <summary>
/// Appends new record to table.
/// </summary>
public void AppendRecord(object[] values)
{
if (!this.IsDatabaseOpen)
{
throw new Exception("Database isn't open, please open database first !");
}
if (m_pColumns.Count != values.Length)
{
throw new Exception("Each column must have corresponding value !");
}
bool unlock = true;
// Table is already locked, don't lock it
if (this.TableLocked)
{
unlock = false;
}
else
{
LockTable(15);
}
// Construct record data
byte[] record = LDB_Record.CreateRecord(this, values);
// Get free data pages
DataPage[] dataPages = GetDataPages(0, (int)Math.Ceiling(record.Length / (double)m_DataPageDataAreaSize));
DbFile.StoreDataToDataPages(m_DataPageDataAreaSize, record, dataPages);
if (unlock)
{
UnlockTable();
}
}
