Example #1
0
        public Sql <T2> Select <T2>(Expression <Func <T, T2> > Expr)
        {
            if (Expr.Body is NewExpression)
            {
                var ret = BaseSql.Clone <T, T2>(this);
                if (ret.MapFields == null)
                {
                    ret.MapFields = new List <MapFieldInfo>();
                }
                ret.MapFields.AddRange(this.MapFields.Select(p => p.Clone()));
                var nx = Expr.Body as NewExpression;
                foreach (var mbx in nx.Members)
                {
                    var          arg = nx.Arguments[nx.Members.IndexOf(mbx)];
                    MapFieldInfo mp  = null;
                    if (arg is MemberExpression)
                    {
                        mp = ret.MapFields.FirstOrDefault(p => p.Member == mbx && p.ParamExpr == Expr.Parameters[0]);
                        if (mp == null)
                        {
                            mp = ret.MapFields.FirstOrDefault(p => p.Member == mbx && p.ParamExpr.Type == Expr.Parameters[0].Type);
                        }
                        if (mp == null)
                        {
                            mp = ret.MapFields.FirstOrDefault(p => p.Name == mbx.Name && p.ParamExpr == Expr.Parameters[0]);
                        }
                        if (mp == null)
                        {
                            mp = ret.MapFields.FirstOrDefault(p => p.Name == mbx.Name && p.ParamExpr.Type == Expr.Parameters[0].Type);
                        }
                        if (mp != null)
                        {
                            mp.Member    = mbx as PropertyInfo;
                            mp.ParamExpr = Expr.Parameters[0];
                        }
                        else
                        {
                            ret.MapFields.Add(new MapFieldInfo
                            {
                                AliasName = mbx.Name,
                                Member    = mbx as PropertyInfo,
                                ParamExpr = Expr.Parameters[0],
                                Name      = ((MemberExpression)arg).Member.Name
                            });
                        }
                    }
                    else
                    {
                        ret.MapFields.Add(new MapFieldInfo
                        {
                            AliasName = mbx.Name,
                            Member    = mbx as PropertyInfo,
                            ParamExpr = Expr.Parameters[0],
                            Name      = mbx.Name
                        });
                    }
                }

                ret.SelectedFields = ExprCompiler.GetSelectedFieldsFromNewExpression(ret, (NewExpression)Expr.Body);

                var tempMapping = new List <MapFieldInfo>();

                nx.Members.ToList().ForEach(p =>
                {
                    var mp = ret.MapFields.FirstOrDefault(x => x.Member == p);
                    tempMapping.Add(new MapFieldInfo()
                    {
                        Alias     = (mp != null)?mp.Alias:null,
                        AliasName = (mp != null) ? mp.AliasName : null,
                        ExprField = (mp != null && mp.ExprField != null) ? mp.ExprField.Clone() : null,
                        Member    = p as PropertyInfo,
                        Name      = p.Name,
                        ParamExpr = Expr.Parameters[0],
                        Schema    = this.schema,
                        TableName = this.table
                    });
                });
                ret.MapFields = tempMapping;
                ret.SelectedFields.ForEach(p => {
                    if (p.Field != null)
                    {
                        if (p.Field.Name == p.Field.AliasName)
                        {
                            p.Field.AliasName = null;
                        }
                        else
                        {
                            //ret.IsSubQuery = true;
                        }
                    }
                    else if (p.Op != null)
                    {
                        //ret.IsSubQuery = true;
                    }
                });
                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);
            }
            if (Expr.Body is MemberExpression)
            {
                var ret = BaseSql.Clone <T, T2>(this);
                var mp  = ret.MapFields.FirstOrDefault(p => p.Member == ((MemberExpression)Expr.Body).Member);
                if (ret.SelectedFields == null)
                {
                    ret.SelectedFields = new List <TreeExpr>();
                }
                ret.SelectedFields.Add(new TreeExpr
                {
                    Field = new FieldExpr
                    {
                        AliasName = mp.AliasName,
                        Name      = mp.Name,
                        Schema    = mp.Schema,
                        TableName = mp.TableName
                    }
                });
                ret.MapFields.Clear();
                ret.MapFields.Add(mp);
                return(ret);
            }
            if (Expr.Body is MemberInitExpression)
            {
                var mx  = Expr.Body as MemberInitExpression;
                var ret = BaseSql.Clone <T, T2>(this);
                ret.SelectedFields = ExprCompiler.GetSelectedFieldsFromMemberInitExpression(ret, mx);
                ret.SelectedFields.ForEach(p => {
                    if (p.Field != null)
                    {
                        if (p.Field.Name == p.Field.AliasName)
                        {
                            p.Field.AliasName = null;
                        }
                        else
                        {
                            ret.IsSubQuery = true;
                        }
                    }
                    //else if (p.Op != null)
                    //{
                    //    ret.IsSubQuery = true;
                    //}
                });
                return(ret);
            }
            if (Expr.Body is ParameterExpression)
            {
                var px  = Expr.Body as ParameterExpression;
                var ret = BaseSql.Clone <T, T2>(this);
                var mp  = ret.MapFields.FirstOrDefault(p => (p.ParamExpr != null) && p.ParamExpr.Type == px.Type);
                if (mp != null)
                {
                    if (ret.SelectedFields == null)
                    {
                        ret.SelectedFields = new List <TreeExpr>();
                    }
                    ret.SelectedFields.Add(new TreeExpr()
                    {
                        Field = new FieldExpr
                        {
                            TableName = mp.TableName
                        }
                    });
                    ret.MapFields.AddRange(px.Type.GetProperties().Select(p => new MapFieldInfo()
                    {
                        Member    = p,
                        Name      = p.Name,
                        Schema    = mp.Schema,
                        TableName = mp.TableName,
                        ParamExpr = px
                    }));
                }
                return(ret);
            }
            throw new NotImplementedException();
        }
Example #2
0
        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();
        }
Example #3
0
        public static Sql <T> DoInnerJoinByLambdaExpression <T>(BaseSql qr1, BaseSql qr2, LambdaExpression conditional, LambdaExpression selector)
        {
            var x = GetAllParamsExpr(conditional);
            //var y = GetAllParamsExpr(selector);
            var ret = new Sql <T>(true);

            ret.AliasCount++;
            var leftAlias   = "l" + ret.AliasCount + "" + qr1.AliasCount + "" + qr2.AliasCount;
            var righttAlias = "r" + ret.AliasCount + "" + qr1.AliasCount + "" + qr2.AliasCount;

            ret.MapFields = new List <MapFieldInfo>();
            if (qr1.MapFields != null)
            {
                qr1.MapFields.ForEach(p =>
                {
                    var P = p.Clone();

                    P.SetTableName(leftAlias);
                    ret.MapFields.Add(P);
                    P.ParamExpr  = selector.Parameters[0];
                    var P1       = P.Clone();
                    P1.ParamExpr = x[0];
                    ret.MapFields.Add(P1);
                });
            }
            if (qr2.MapFields != null)
            {
                qr2.MapFields.ForEach(p =>
                {
                    var P = p.Clone();
                    P.SetTableName(righttAlias);
                    ret.MapFields.Add(P);
                    P.ParamExpr  = selector.Parameters[1];
                    var P1       = P.Clone();
                    P1.ParamExpr = x[1];
                    ret.MapFields.Add(P1);
                });
            }
            var joinExor = ExprCompiler.Compile(ret, conditional, null);

            if (selector.Body is MemberInitExpression)
            {
                ret.SelectedFields = ExprCompiler.GetSelectedFieldsFromMemberInitExpression(ret, (MemberInitExpression)selector.Body);
            }
            if (selector.Body is NewExpression)
            {
                ret.SelectedFields = ExprCompiler.GetSelectedFieldsFromNewExpression(ret, (NewExpression)selector.Body);
            }
            ret.source = new ExprDataSource
            {
                JoinExpr = joinExor,
                JoinType = "left"
            };
            ret.source.LeftSource = new ExprDataSource
            {
                Schema = qr1.schema,
                Table  = qr1.table,
                Alias  = leftAlias,
                Source = (qr1.source != null) ? qr1.source.Clone() : null
            };
            ret.source.RightSource = new ExprDataSource
            {
                Schema = qr2.schema,
                Table  = qr2.table,
                Alias  = righttAlias,
                Source = (qr2.source != null) ? qr2.source.Clone() : null
            };

            if (selector.Body is NewExpression)
            {
                var nx = selector.Body as NewExpression;
                foreach (var mb in nx.Members)
                {
                    if (!(nx.Arguments[nx.Members.IndexOf(mb)] is ParameterExpression))
                    {
                        var fm = ret.SelectedFields.FirstOrDefault(p => (p.Field != null) && (p.Field.Name == mb.Name));
                        if (fm == null)
                        {
                            fm = ret.SelectedFields.FirstOrDefault(p => (p.Value != null) && (p.Value.AliasName == mb.Name));
                        }
                        ret.MapFields.Add(new MapFieldInfo()
                        {
                            Member    = mb as PropertyInfo,
                            ParamExpr = Expression.Parameter(typeof(T), "p"),
                            Name      = mb.Name,
                            Schema    = ret.schema,
                            TableName = ret.table,
                            ExprField = fm
                        });
                    }
                }
            }
            else if (selector.Body is MemberInitExpression)
            {
                var mbi = selector.Body as MemberInitExpression;
                foreach (MemberAssignment mba in mbi.Bindings)
                {
                    if (!(mba.Expression is ParameterExpression))
                    {
                        var fm = ret.SelectedFields.FirstOrDefault(p => (p.Field != null) && (p.Field.Name == mba.Member.Name));
                        if (fm == null)
                        {
                            fm = ret.SelectedFields.FirstOrDefault(p => (p.Value != null) && (p.Value.AliasName == mba.Member.Name));
                        }
                        ret.MapFields.Add(new MapFieldInfo()
                        {
                            Member    = mba.Member as PropertyInfo,
                            ParamExpr = Expression.Parameter(typeof(T), "p"),
                            Name      = mba.Member.Name,
                            Schema    = ret.schema,
                            TableName = ret.table,
                            ExprField = fm
                        });
                    }
                }
            }
            else
            {
                throw new NotImplementedException();
            }
            return(ret);
        }