public Result ExecuteUpdateStatement(Session session)
{
Expression[] updateExpressions = base.UpdateExpressions;
RowSetNavigatorDataChange navigator = new RowSetNavigatorDataChange();
SqlType[] columnTypes = base.BaseTable.GetColumnTypes();
IRangeIterator iterator = RangeVariable.GetIterator(session, base.TargetRangeVariables);
while (iterator.Next())
{
session.sessionData.StartRowProcessing();
Row currentRow = iterator.GetCurrentRow();
object[] rowData = currentRow.RowData;
object[] data = GetUpdatedData(session, this._targets, base.BaseTable, base.UpdateColumnMap, updateExpressions, columnTypes, rowData);
if (this.UpdatableTableCheck != null)
{
iterator.SetCurrent(data);
if (!this.UpdatableTableCheck.TestCondition(session))
{
iterator.Release();
throw Error.GetError(0x1644);
}
}
navigator.AddRow(session, currentRow, data, columnTypes, base.UpdateColumnMap);
}
iterator.Release();
navigator.BeforeFirst();
int count = this.Update(session, base.BaseTable, navigator);
switch (count)
{
case 1:
return(Result.UpdateOneResult);
case 0:
return(Result.UpdateZeroResult);
}
return(new Result(1, count));
}
public Result ExecuteDeleteStatement(Session session)
{
IRangeIterator iterator = RangeVariable.GetIterator(session, base.TargetRangeVariables);
RowSetNavigatorDataChange navigator = new RowSetNavigatorDataChange();
while (iterator.Next())
{
Row currentRow = iterator.GetCurrentRow();
navigator.AddRow(currentRow);
}
iterator.Release();
if (navigator.GetSize() <= 0)
{
return(Result.UpdateZeroResult);
}
int count = Delete(session, base.BaseTable, navigator);
if (count == 1)
{
return(Result.UpdateOneResult);
}
return(new Result(1, count));
}