Esempio n. 1
0
        internal override GraphViewExecutionOperator Compile(QueryCompilationContext context, GraphViewCommand command)
        {
            //
            // Parameters:
            //   #1 <WValueExpression>: Vertex label
            //   ... <WPropertyExpression>: The initial properties on vertex
            //

            WValueExpression labelValue = (WValueExpression)this.Parameters[0];

            Debug.Assert(labelValue.Value != null, "[WAddVTableReference.Compile] Vertex label should not be null");

            List <PropertyTuple> vertexProperties = new List <PropertyTuple>();

            List <string> projectedField = new List <string>(GraphViewReservedProperties.InitialPopulateNodeProperties);

            projectedField.Add(GremlinKeyword.Star);
            projectedField.Add(GremlinKeyword.Label);


            for (int i = 1; i < this.Parameters.Count; i++)
            {
                WPropertyExpression property = (WPropertyExpression)this.Parameters[i];
                Debug.Assert(property != null, "[WAddVTableReference.Compile] Vertex property should not be null");
                Debug.Assert(property.Cardinality == GremlinKeyword.PropertyCardinality.List, "[WAddVTableReference.Compile] Vertex property should be append-mode");
                Debug.Assert(property.Value != null);

                if (!projectedField.Contains(property.Key.Value))
                {
                    projectedField.Add(property.Key.Value);
                }

                if (property.Value is WValueExpression)
                {
                    WValueExpression value = property.Value as WValueExpression;
                    Dictionary <string, Tuple <StringField, ScalarSubqueryFunction> > meta = new Dictionary <string, Tuple <StringField, ScalarSubqueryFunction> >();
                    foreach (KeyValuePair <WValueExpression, WScalarExpression> pair in property.MetaProperties)
                    {
                        string name = pair.Key.Value;
                        if (pair.Value is WValueExpression)
                        {
                            WValueExpression metaValue = pair.Value as WValueExpression;
                            meta.Add(name, new Tuple <StringField, ScalarSubqueryFunction>(metaValue.ToStringField(), null));
                        }
                        else
                        {
                            WScalarSubquery        metaScalarSubquery = pair.Value as WScalarSubquery;
                            ScalarSubqueryFunction metaValueFunction  = (ScalarSubqueryFunction)metaScalarSubquery.CompileToFunction(context, command);
                            meta.Add(name, new Tuple <StringField, ScalarSubqueryFunction>(null, metaValueFunction));
                        }
                    }

                    PropertyTuple valueProperty = new PropertyTuple(property.Cardinality, property.Key.Value, value.ToStringField(), meta);
                    vertexProperties.Add(valueProperty);
                }
                else
                {
                    WScalarSubquery        scalarSubquery = property.Value as WScalarSubquery;
                    ScalarSubqueryFunction valueFunction  = (ScalarSubqueryFunction)scalarSubquery.CompileToFunction(context, command);

                    Dictionary <string, Tuple <StringField, ScalarSubqueryFunction> > meta = new Dictionary <string, Tuple <StringField, ScalarSubqueryFunction> >();
                    foreach (KeyValuePair <WValueExpression, WScalarExpression> pair in property.MetaProperties)
                    {
                        string name = pair.Key.Value;
                        if (pair.Value is WValueExpression)
                        {
                            WValueExpression metaValue = pair.Value as WValueExpression;
                            meta.Add(name, new Tuple <StringField, ScalarSubqueryFunction>(metaValue.ToStringField(), null));
                        }
                        else
                        {
                            WScalarSubquery        metaScalarSubquery = pair.Value as WScalarSubquery;
                            ScalarSubqueryFunction metaValueFunction  = (ScalarSubqueryFunction)metaScalarSubquery.CompileToFunction(context, command);
                            meta.Add(name, new Tuple <StringField, ScalarSubqueryFunction>(null, metaValueFunction));
                        }
                    }

                    PropertyTuple valueProperty = new PropertyTuple(property.Cardinality, property.Key.Value, valueFunction, meta);
                    vertexProperties.Add(valueProperty);
                }
            }

            JObject nodeJsonDocument = ConstructNodeJsonDocument(command, labelValue.Value);

            AddVOperator addVOp = new AddVOperator(
                context.CurrentExecutionOperator,
                command,
                nodeJsonDocument,
                projectedField,
                vertexProperties);

            context.CurrentExecutionOperator = addVOp;

            for (int i = 0; i < projectedField.Count; i++)
            {
                string          propertyName    = projectedField[i];
                ColumnGraphType columnGraphType = GraphViewReservedProperties.IsNodeReservedProperty(propertyName)
                    ? GraphViewReservedProperties.ReservedNodePropertiesColumnGraphTypes[propertyName]
                    : ColumnGraphType.Value;
                context.AddField(Alias.Value, propertyName, columnGraphType);
            }

            // Convert the connection to Hybrid if necessary
            if (command.Connection.GraphType != GraphType.GraphAPIOnly)
            {
                command.Connection.GraphType = GraphType.Hybrid;
            }

            return(addVOp);
        }
Esempio n. 2
0
        internal override GraphViewExecutionOperator Compile(QueryCompilationContext context, GraphViewCommand command)
        {
            WColumnReferenceExpression updateParameter = this.Parameters[0] as WColumnReferenceExpression;
            int updateIndex = context.LocateColumnReference(updateParameter);
            List <PropertyTuple> propertiesList = new List <PropertyTuple>();

            for (int i = 1; i < this.Parameters.Count; ++i)
            {
                WPropertyExpression property = this.Parameters[i] as WPropertyExpression;
                if (property.Value is WValueExpression)
                {
                    WValueExpression value = property.Value as WValueExpression;
                    Dictionary <string, Tuple <StringField, ScalarSubqueryFunction> > meta = new Dictionary <string, Tuple <StringField, ScalarSubqueryFunction> >();

                    foreach (KeyValuePair <WValueExpression, WScalarExpression> pair in property.MetaProperties)
                    {
                        string name = pair.Key.Value;
                        if (pair.Value is WValueExpression)
                        {
                            WValueExpression metaValue = pair.Value as WValueExpression;
                            meta.Add(name, new Tuple <StringField, ScalarSubqueryFunction>(metaValue.ToStringField(), null));
                        }
                        else
                        {
                            WScalarSubquery        metaScalarSubquery = pair.Value as WScalarSubquery;
                            ScalarSubqueryFunction metaValueFunction  = (ScalarSubqueryFunction)metaScalarSubquery.CompileToFunction(context, command);
                            meta.Add(name, new Tuple <StringField, ScalarSubqueryFunction>(null, metaValueFunction));
                        }
                    }

                    PropertyTuple valueProperty = new PropertyTuple(property.Cardinality, property.Key.Value, value.ToStringField(), meta);
                    propertiesList.Add(valueProperty);
                }
                else
                {
                    WScalarSubquery        scalarSubquery = property.Value as WScalarSubquery;
                    ScalarSubqueryFunction valueFunction  = (ScalarSubqueryFunction)scalarSubquery.CompileToFunction(context, command);

                    Dictionary <string, Tuple <StringField, ScalarSubqueryFunction> > meta = new Dictionary <string, Tuple <StringField, ScalarSubqueryFunction> >();
                    foreach (KeyValuePair <WValueExpression, WScalarExpression> pair in property.MetaProperties)
                    {
                        string name = pair.Key.Value;
                        if (pair.Value is WValueExpression)
                        {
                            WValueExpression metaValue = pair.Value as WValueExpression;
                            meta.Add(name, new Tuple <StringField, ScalarSubqueryFunction>(metaValue.ToStringField(), null));
                        }
                        else
                        {
                            WScalarSubquery        metaScalarSubquery = pair.Value as WScalarSubquery;
                            ScalarSubqueryFunction metaValueFunction  = (ScalarSubqueryFunction)metaScalarSubquery.CompileToFunction(context, command);
                            meta.Add(name, new Tuple <StringField, ScalarSubqueryFunction>(null, metaValueFunction));
                        }
                    }

                    PropertyTuple valueProperty = new PropertyTuple(property.Cardinality, property.Key.Value, valueFunction, meta);
                    propertiesList.Add(valueProperty);
                }
            }

            UpdatePropertiesOperator updateOp = new UpdatePropertiesOperator(
                context.CurrentExecutionOperator,
                command,
                updateIndex,
                propertiesList);

            context.CurrentExecutionOperator = updateOp;

            return(updateOp);
        }