public Sql <T> Where(Expression <Func <T, bool> > Expr)
{
Sql <T> ret = BaseSql.Clone <T, T>(this);
if (!this.IsSubQuery)
{
if (this.SelectedFields != null && this.SelectedFields.Count > 0)
{
if (ret.SelectedFields == null)
{
ret.SelectedFields = new List <TreeExpr>();
}
ret.SelectedFields.AddRange(this.SelectedFields.Select(p => p.Clone()));
}
if (((BaseSql)ret).filter == null)
{
((BaseSql)ret).filter = ExprCompiler.Compile(((BaseSql)ret), Expr.Body, null);
}
else
{
((BaseSql)ret).filter = new TreeExpr
{
Op = ExprCompiler.GetOp(ExpressionType.And),
Left = ((BaseSql)ret).filter,
Right = ExprCompiler.Compile(((BaseSql)ret), Expr.Body, ((MemberExpression)Expr.Body).Member)
};
}
return(ret);
}
else
{
ret.AliasCount = this.AliasCount + 1;
ret.Alias = "sql" + ret.AliasCount;
ret.MapFields.ForEach(p => {
if (p.TableName == null)
{
p.TableName = ret.Alias;
}
});
ret.source = new ExprDataSource
{
Alias = ret.Alias,
Fields = this.SelectedFields.Select(p => p.Clone()).ToList(),
Schema = this.schema,
Table = this.table,
Source = this.source,
ParamExpr = Expression.Parameter(ret.ElementType, "p")
};
if (this.filter != null)
{
ret.source.filter = this.filter.Clone();
}
ret.filter = ExprCompiler.Compile(((BaseSql)ret), Expr.Body, null);
return(ret);
}
}
public Sql <T2> Join <T1, T2>(Sql <T1> sql, Expression <Func <T, T1, bool> > ExprJoin, Expression <Func <T, T1, T2> > Selector)
{
if ((!this.IsSubQuery) && (!sql.IsSubQuery))
{
var ret = new Sql <T2>();
ret.MapFields = new List <MapFieldInfo>();
this.AliasCount++;
sql.AliasCount++;
ret.AliasCount++;
var leftAlias = "l" + ret.AliasCount + "" + (this.AliasCount);
var rightAlias = "r" + ret.AliasCount + "" + (sql.AliasCount);
this.MapFields.ForEach(p =>
{
var P = p.Clone();
if (!ExprCompiler.IsPrimitiveType(((PropertyInfo)p.Member).PropertyType))
{
P.Name = null;
}
P.SetTableName(leftAlias);
P.ParamExpr = ExprJoin.Parameters[0];
ret.MapFields.Add(P);
});
sql.MapFields.ForEach(p =>
{
var P = p.Clone();
if (!ExprCompiler.IsPrimitiveType(((PropertyInfo)p.Member).PropertyType))
{
P.Name = null;
}
P.SetTableName(rightAlias);
P.ParamExpr = ExprJoin.Parameters[1];
ret.MapFields.Add(P);
});
if (Selector.Body is NewExpression)
{
var nx = Selector.Body as NewExpression;
if (nx.Members != null)
{
nx.Members.ToList().ForEach(p =>
{
var fx = nx.Arguments[nx.Members.IndexOf(p)];
var mp = ret.MapFields.FirstOrDefault(x => x.Member == p && x.ParamExpr == fx);
if (mp == null)
{
mp = ret.MapFields.FirstOrDefault(x => x.Member == p);
}
ret.MapFields.Add(new MapFieldInfo()
{
Alias = (mp != null) ? mp.Alias : null,
AliasName = (mp != null) ? mp.AliasName : null,
ExprField = (mp != null) ? mp.ExprField.Clone() : null,
Member = p as PropertyInfo,
Name = (mp != null) ? mp.Name : p.Name
});
});
}
}
var JoinExpr = ExprCompiler.Compile(ret, ExprJoin.Body, null);
JoinExpr.ClearAliasName();
ret.source = new ExprDataSource
{
JoinType = "inner",
JoinExpr = JoinExpr,
LeftSource = new ExprDataSource
{
Alias = leftAlias,
Schema = this.schema,
Table = this.table,
ParamExpr = Expression.Parameter(this.ElementType, "p"),
Source = (this.source != null)?this.source.Clone():null
},
RightSource = new ExprDataSource
{
Alias = rightAlias,
Schema = sql.schema,
Table = sql.table,
ParamExpr = Expression.Parameter(sql.ElementType, "p"),
Source = (sql.source != null) ? sql.source.Clone() : null
}
};
if (Selector.Body is NewExpression)
{
ret.SelectedFields = ExprCompiler.GetSelectedFieldsFromNewExpression(ret, (NewExpression)Selector.Body);
}
else if (Selector.Body is MemberInitExpression)
{
ret.SelectedFields = ExprCompiler.GetSelectedFieldsFromMemberInitExpression(ret, (MemberInitExpression)Selector.Body);
}
else if (Selector.Body is ParameterExpression)
{
if (ret.SelectedFields == null)
{
ret.SelectedFields = new List <TreeExpr>();
}
if (Selector.Parameters[0] == Selector.Body)
{
ret.SelectedFields.Add(new TreeExpr
{
Field = new FieldExpr
{
TableName = leftAlias
}
});
}
else if (Selector.Body == Selector.Parameters[1])
{
ret.SelectedFields.Add(new TreeExpr
{
Field = new FieldExpr
{
TableName = rightAlias
}
});
}
}
else
{
throw new NotSupportedException();
}
if (this.filter != null)
{
ret.filter = this.filter.Clone();
ret.filter.SetTableName(leftAlias);
}
if (sql.filter != null)
{
var rFilter = sql.filter.Clone();
rFilter.SetTableName(rightAlias);
sql.filter = new TreeExpr
{
Op = ExprCompiler.GetOp(ExpressionType.And),
Left = sql.filter,
Right = rFilter
};
}
ret.SelectedFields.Join(ret.MapFields, p => p.AliasName, q => q.Name, (p, q) => new { p, q })
.ToList().ForEach(F =>
{
F.q.ExprField = F.p.Clone();
});
return(ret);
}
throw new NotImplementedException();
}
public static IQueryable <T> DoInnerJoin <T>(BaseSql qr1, BaseSql qr2, MemberExpression leftKey, MemberExpression rightKey, Expression selector)
{
var ret = new Sql <T>(true);
var leftName = "l" + ret.AliasCount + "" + qr1.AliasCount + "" + qr2.AliasCount;
var rightName = "r" + ret.AliasCount + "" + qr1.AliasCount + "" + qr2.AliasCount;
if (!(qr1.IsSubQuery) && (!qr2.IsSubQuery))
{
var leftMp = qr1.MapFields.FirstOrDefault(p => p.Member == leftKey.Member);
var rightMp = qr2.MapFields.FirstOrDefault(p => p.Member == rightKey.Member);
ret.source = new ExprDataSource
{
JoinType = "inner",
LeftSource = new ExprDataSource
{
Alias = leftName,
Schema = qr1.schema,
Table = qr1.table
},
RightSource = new ExprDataSource
{
Alias = rightName,
Schema = qr2.schema,
Table = qr2.table
},
JoinExpr = new TreeExpr
{
Op = ExprCompiler.GetOp(ExpressionType.Equal),
Left = new TreeExpr
{
Field = new FieldExpr
{
TableName = leftName,
Name = leftMp.Name
}
},
Right = new TreeExpr
{
Field = new FieldExpr
{
TableName = rightName,
Name = rightMp.Name
}
}
}
};
return(ret as IQueryable <T>);
}
if ((qr1.IsSubQuery) && (!qr2.IsSubQuery))
{
var sql1 = new BaseSql();
var leftMp = qr1.MapFields.FirstOrDefault(p => p.Member == leftKey.Member);
var rightMp = qr2.MapFields.FirstOrDefault(p => p.Member == rightKey.Member);
ret.source = new ExprDataSource
{
JoinType = "inner",
LeftSource = new ExprDataSource
{
Source = new ExprDataSource
{
Alias = qr1.Alias,
Fields = (qr1.SelectedFields != null)?qr1.SelectedFields.Select(p => p.Clone()).ToList():null,
filter = (qr1.filter != null)?qr1.filter.Clone():null,
GroupFields = (qr1.GroupByFields != null)?qr1.GroupByFields.Select(p => p.Clone()).ToList():null,
HavingFields = (qr1.HavingFields != null)?qr1.HavingFields.Select(p => p.Clone()).ToList():null,
Schema = qr1.schema,
Table = qr1.table,
JoinExpr = (qr1.source != null)?qr1.source.JoinExpr:null,
JoinType = (qr1.source != null) ? qr1.source.JoinType : null,
LeftSource = (qr1.source != null) ? qr1.source.LeftSource : null,
RightSource = (qr1.source != null) ? qr1.source.RightSource : null,
ParamExpr = qr1.ParamExpr
}
},
RightSource = new ExprDataSource
{
Alias = rightName,
Schema = qr2.schema,
Table = qr2.table
},
JoinExpr = new TreeExpr
{
Op = ExprCompiler.GetOp(ExpressionType.Equal),
Left = new TreeExpr
{
Field = new FieldExpr
{
TableName = leftName,
Name = leftMp.Name
}
},
Right = new TreeExpr
{
Field = new FieldExpr
{
TableName = rightName,
Name = rightMp.Name
}
}
}
};
if (ret.source.LeftSource.Fields == null ||
ret.source.Fields.Count == 0)
{
ret.source.Fields = new List <TreeExpr>();
ret.source.Fields.Add(new TreeExpr
{
Field = new FieldExpr
{
TableName = qr1.table
}
});
}
return(ret as IQueryable <T>);
}
throw new NotSupportedException();
}
