public DBTableSet On(DBClause parent, Compare comp, DBClause child)
{
DBComparison compare = DBComparison.Compare(parent, comp, child);
this.Last = this.Root.On(compare);
return(this);
}
//
// static statement factory methods
#region public static DBFilterSet Where(DBComparison compare) + 2 overloads
public static DBFilterSet Where(DBClause left, Compare op, DBClause right)
{
if (null == left)
{
throw new ArgumentNullException("left");
}
else if (null == right)
{
throw new ArgumentNullException("right");
}
DBComparison comp = DBComparison.Compare(left, op, right);
return(Where(comp));
}
public DBTableSet InnerJoin(DBTable table, DBClause parent, Compare op, DBClause child)
{
DBComparison comp = DBComparison.Compare(parent, op, child);
if (this.Root is DBTable)
{
((DBTable)this.Root).InnerJoin(table, comp);
}
else if (this.Root is DBSubQuery)
{
((DBSubQuery)this.Root).InnerJoin(table, comp);
}
else
{
throw new InvalidOperationException("Current root does not support joins");
}
this.Last = table;
return(this);
}
protected virtual DBClause DoRead(string element, XmlReader reader, XmlReaderContext context)
{
DBClause c = null;
switch (element)
{
case (XmlHelper.Select):
c = DBSelectQuery.Select();
break;
case (XmlHelper.Delete):
c = DBDeleteQuery.Delete();
break;
case (XmlHelper.Update):
c = DBUpdateQuery.Update();
break;
case (XmlHelper.Insert):
c = DBInsertQuery.InsertInto();
break;
case (XmlHelper.Script):
c = DBQuery.Script();
break;
case (XmlHelper.Use):
c = DBUseQuery.Use();
break;
case (XmlHelper.Table):
c = DBTable.Table();
break;
case (XmlHelper.Fields):
c = DBSelectSet.Select();
break;
case (XmlHelper.AField):
c = DBField.Field();
break;
case (XmlHelper.AllFields):
c = DBField.AllFields();
break;
case (XmlHelper.From):
c = DBTableSet.From();
break;
case (XmlHelper.Where):
c = DBFilterSet.Where();
break;
case (XmlHelper.Group):
c = DBGroupBySet.GroupBy();
break;
case (XmlHelper.Order):
c = DBOrderSet.OrderBy();
break;
case (XmlHelper.Assignments):
c = DBAssignSet.Assign();
break;
case (XmlHelper.Values):
c = DBValueSet.Values();
break;
case (XmlHelper.Join):
c = DBJoin.Join();
break;
case (XmlHelper.Function):
c = DBFunction.Function();
break;
case (XmlHelper.Constant):
c = DBConst.Null();
break;
case (XmlHelper.Top):
c = DBTop.Top();
break;
case (XmlHelper.UnaryOp):
c = DBComparison.Not();
break;
case (XmlHelper.Compare):
c = DBComparison.Compare();
break;
case (XmlHelper.Between):
c = DBComparison.Between();
break;
case (XmlHelper.Parameter):
//parameter is a special case.
//we add them to akeyed colection if they are not already registered
//then at the end we set the values at the end
string name = reader.GetAttribute(XmlHelper.Name);
DBParam aparam;
if (context.Parameters.TryGetParameter(name, out aparam))
{
c = aparam;
}
else
{
aparam = DBParam.Param();
aparam.Name = name;
context.Parameters.Add(aparam);
c = aparam;
}
break;
case (XmlHelper.OrderBy):
c = DBOrder.OrderBy();
break;
case (XmlHelper.Calculation):
c = DBCalc.Calculate();
break;
case (XmlHelper.Aggregate):
c = DBAggregate.Aggregate();
break;
case (XmlHelper.ValueGroup):
c = DBValueGroup.Empty();
break;
case (XmlHelper.BooleanOperator):
c = DBBooleanOp.Compare();
break;
case (XmlHelper.Assign):
c = DBAssign.Assign();
break;
case (XmlHelper.InnerSelect):
c = DBSubQuery.SubSelect();
break;
case (XmlHelper.Multiple):
c = DBMultiComparisonRef.Many();
break;
case (XmlHelper.QueryOptionSet):
c = new DBQueryHintOptionSet();
break;
case (XmlHelper.QueryOption):
c = DBQueryHintOption.QueryOption();
break;
case (XmlHelper.CreateSproc):
c = DBCreateProcedureQuery.CreateProcedure();
break;
case (XmlHelper.Declare):
c = DBDeclaration.Declare();
break;
case (XmlHelper.CreateTable):
c = DBCreateTableQuery.Table();
break;
case (XmlHelper.ColumnDefinition):
c = DBColumn.Column();
break;
case (XmlHelper.PrimaryKey):
c = DBPrimaryKey.PrimaryKey();
break;
case (XmlHelper.ForeignKey):
c = DBForeignKey.ForeignKey();
break;
case (XmlHelper.CreateIndex):
c = DBCreateIndexQuery.Index();
break;
case (XmlHelper.CreateView):
c = DBCreateViewQuery.CreateView();
break;
case (XmlHelper.CreateSequence):
c = DBCreateSequenceQuery.Sequence();
break;
case (XmlHelper.DropTable):
c = DBDropTableQuery.DropTable();
break;
case (XmlHelper.DropIndex):
c = DBDropIndexQuery.DropIndex();
break;
case (XmlHelper.DropView):
c = DBDropViewQuery.DropView();
break;
case (XmlHelper.DropSproc):
c = DBDropProcedureQuery.DropProcedure();
break;
case (XmlHelper.DropSequence):
c = DBDropSequenceQuery.DropSequence();
break;
default:
throw XmlHelper.CreateException("The XML data could not be deserialized because the element {1} was not recognised. {0}", reader, null, element);
}
if (c != null)
{
c.ReadXml(reader, context);
}
return(c);
}
/// <summary>
/// Appends a new LEFT OUTER JOIN between this table and the specified table matching between this tables parentfield and the other tables child field
/// </summary>
/// <param name="tbl"></param>
/// <param name="parent"></param>
/// <param name="comp"></param>
/// <param name="child"></param>
/// <returns></returns>
public DBJoin LeftJoin(DBTable tbl, DBClause parent, Compare comp, DBClause child)
{
DBComparison c = DBComparison.Compare(parent, comp, child);
return(LeftJoin(tbl, c));
}
public DBFilterSet Or(DBClause left, Compare op, DBClause clause)
{
return(Or(DBComparison.Compare(left, op, clause)));
}
//
// static methods
//
#region public static DBJoin InnerJoin(DBReference jointo, DBFieldRef from, DBFieldRef to, ComparisonOperator comparison)
/// <summary>
/// Creates a new INNER JOIN with the ON set to the comparison of from and to
/// </summary>
/// <param name="jointo"></param>
/// <param name="from"></param>
/// <param name="to"></param>
/// <param name="comparison"></param>
/// <returns></returns>
public static DBJoin InnerJoin(DBClause jointo, DBClause from, DBClause to, Compare comparison)
{
DBComparison compref = DBComparison.Compare(from, comparison, to);
return(InnerJoin(jointo, compref));
}