private static QuerySet <T> BuilCrossJoin <T1, T2, T>(QuerySet <T1> qr1, QuerySet <T2> qr2, Expression <Func <T1, T2, T> > resultSelector)
{
var Params = new List <object>();
var retQr = new QuerySet <T>();
retQr.sequenceJoin = 1;
var table1 = "T" + retQr.sequenceJoin.ToString();
retQr.sequenceJoin++;
var table2 = "T" + retQr.sequenceJoin.ToString();
var source1 = Globals.Compiler.CreateAliasTable(Globals.Compiler.GetQName(qr1.Schema, qr1.GetTableName()), Globals.Compiler.GetQName("", table1));
var source2 = Globals.Compiler.CreateAliasTable(Globals.Compiler.GetQName(qr1.Schema, qr2.GetTableName()), Globals.Compiler.GetQName("", table2));
if (qr1.GetFields().Count > 0 || (!string.IsNullOrEmpty(((QuerySet <T1>)qr1).where)))
{
source1 = Globals.Compiler.CreateAliasTable("(" + qr1.ToSQLString() + ")", Globals.Compiler.GetQName("", table1));
}
if (qr2.GetFields().Count > 0 || (!string.IsNullOrEmpty(((QuerySet <T2>)qr2).where)))
{
source2 = Globals.Compiler.CreateAliasTable("(" + qr2.ToSQLString() + ")", Globals.Compiler.GetQName("", table2));
}
for (var i = 0; i < qr2.GetParams().Count; i++)
{
var nIndex = qr1.GetParams().Count + Params.Count + i;
source2 = source2.Replace("{" + i.ToString() + "}", "{$##" + nIndex.ToString() + "##$}");
}
string FromSource = source1 + "," + source2;
FromSource = FromSource.Replace("{$##", "{").Replace("##$}", "}");
retQr.SetDataSource(FromSource);
retQr.Params.AddRange(qr1.GetParams());
retQr.Params.AddRange(Params);
retQr.Params.AddRange(qr2.GetParams());
return(retQr);
}
public QuerySet <T2> RightJoin <T1, T2>(QuerySet <T1> qr, Expression <Func <T, T1, bool> > JoinClause, Expression <Func <T, T1, T2> > Selector)
{
return(QueryBuilder.RightJoin(this, qr, JoinClause, Selector));
}
private static QuerySet <T> BuilJoin <T1, T2, T>(QuerySet <T1> qr1, QuerySet <T2> qr2, Expression <Func <T1, T2, bool> > JoinClause, Expression <Func <T1, T2, T> > selecttor, string JoinType)
{
var q1 = qr1 as QuerySet <T1>;
var q2 = qr2 as QuerySet <T2>;
if (q1.IsSubQuery())
{
}
if (q2.IsSubQuery())
{
}
var ret = new QuerySet <T>();
ret.joinTimes = (q1.joinTimes + 1) * 10 + q2.joinTimes;
var ltName = "l" + ret.joinTimes.ToString();
var rtName = "r" + ret.joinTimes.ToString();
var Params = new List <object>();
Params.AddRange(q1.Params);
Params.AddRange(q2.Params);
var joinParams = new List <object>();
var strJoin = Joinner.GetJoinExpr(JoinClause.Body, new string[] { null, null }, new string[] { ltName, rtName }, JoinClause.Parameters, ref joinParams);
strJoin = utils.RepairParameters(strJoin, Params, joinParams);
Params.AddRange(joinParams);
var leftSource = (!q1.IsSubQuery())? utils.GetSource(q1):"(" + q1.ToSQLString() + ")";
var rightSource = (!q2.IsSubQuery()) ? utils.GetSource(q2) : "(" + q2.ToSQLString() + ")";
rightSource = utils.RepairParameters(rightSource, q1.Params, q2.Params);
ret.datasource = leftSource + " as " + Globals.Compiler.GetQName("", ltName) +
" " + JoinType + " join " + rightSource + " as " + Globals.Compiler.GetQName("", rtName) + " on " + strJoin;
var refTables = new List <string>();
var refParameters = new List <ParameterExpression>();
if (q1.table_names != null)
{
refTables.AddRange(q1.table_names);
}
if (q2.table_names != null)
{
refTables.AddRange(q2.table_names);
}
refTables.Add(ltName);
refTables.Add(rtName);
if (q1.fieldParams != null)
{
refParameters.AddRange(q1.fieldParams);
}
if (q2.fieldParams != null)
{
refParameters.AddRange(q2.fieldParams);
}
refParameters.AddRange(selecttor.Parameters);
var retFields = SelectorCompiler.GetFields(selecttor.Body, new string[] { null, null }, refTables.ToArray(), refParameters.ToArray(), ref Params);
ret.fields = retFields;
ret.fieldParams = new List <ParameterExpression>();
ret.fieldParams.AddRange(refParameters);
ret.parametersExpr = selecttor.Parameters;
ret.Params = Params;
ret.table_names = refTables.ToArray();
return(ret);
}
public static QuerySet <T> RightJoin <T1, T2, T>(QuerySet <T1> qr1, QuerySet <T2> qr2, Expression <Func <T1, T2, bool> > JoinClause, Expression <Func <T1, T2, T> > selecttor)
{
return(BuilJoin(qr1, qr2, JoinClause, selecttor, "right"));
}
public static QuerySet <T> CrossJoin <T1, T2, T>(QuerySet <T1> qr1, QuerySet <T2> qr2, Expression <Func <T1, T2, T> > resultSelector)
{
return(BuilCrossJoin <T1, T2, T>(qr1, qr2, resultSelector));
}
