public TemporaryTableHeader ToTableHeader()
{
TemporaryTableHeader header = new TemporaryTableHeader();
foreach (var pair in RawRecordLayout.OrderBy(e => e.Value))
{
header.AddColumn(pair.Key.ColumnName, pair.Key.ColumnGraphType, pair.Value);
}
return(header);
}
/// <summary>
/// Given a column reference, returns its offset in the raw records produced by the SQL statement.
/// </summary>
/// <param name="columnReference"></param>
/// <returns></returns>
public int LocateColumnReference(WColumnReferenceExpression columnReference)
{
if (RawRecordLayout.ContainsKey(columnReference))
{
return(RawRecordLayout[columnReference]);
}
else
{
throw new QueryCompilationException(string.Format("Column reference {0} cannot be located in the raw records in the current execution pipeline.",
columnReference.ToString("")));
}
}
/// <summary>
/// Given a column reference, i.e., the composite key of (table alias, column name),
/// return its offset in raw records produced by the SQL statement.
/// </summary>
/// <param name="tableAlias">Table alias</param>
/// <param name="columnName">Column name</param>
/// <returns>The offset of the column reference in the raw records</returns>
public int LocateColumnReference(string tableAlias, string columnName)
{
WColumnReferenceExpression targetName = new WColumnReferenceExpression(tableAlias, columnName);
if (RawRecordLayout.ContainsKey(targetName))
{
return(RawRecordLayout[targetName]);
}
else
{
throw new QueryCompilationException(string.Format("Column reference {0}.{1} cannot be located in the raw records in the current execution pipeline.",
tableAlias, columnName));
}
}
public bool TryLocateColumnReference(WColumnReferenceExpression columnReference, out int columnIndex)
{
return(RawRecordLayout.TryGetValue(columnReference, out columnIndex));
}
public void ClearField()
{
RawRecordLayout.Clear();
}
