internal override GraphViewExecutionOperator Compile(QueryCompilationContext context, GraphViewConnection dbConnection)
{
var srcIdParameter = Parameters[0] as WColumnReferenceExpression;
var edgeOffsetParameter = Parameters[1] as WColumnReferenceExpression;
var srcIdIndex = context.LocateColumnReference(srcIdParameter);
var edgeOffsetIndex = context.LocateColumnReference(edgeOffsetParameter);
var edgeAlias = edgeOffsetParameter.TableReference;
var propertiesList = new List <Tuple <WValueExpression, WValueExpression, int> >();
for (var i = 2; i < Parameters.Count; i += 2)
{
var keyExpression = Parameters[i] as WValueExpression;
var valueExpression = Parameters[i + 1] as WValueExpression;
int propertyIndex;
if (!context.TryLocateColumnReference(new WColumnReferenceExpression(edgeAlias, keyExpression.Value), out propertyIndex))
{
propertyIndex = -1;
}
propertiesList.Add(new Tuple <WValueExpression, WValueExpression, int>(keyExpression, valueExpression, propertyIndex));
}
var updateEdgePropertiesOp = new UpdateEdgePropertiesOperator(context.CurrentExecutionOperator, dbConnection,
srcIdIndex, edgeOffsetIndex, propertiesList);
context.CurrentExecutionOperator = updateEdgePropertiesOp;
return(updateEdgePropertiesOp);
}
private void DropEdgeProperty(EdgePropertyField ep)
{
//EdgeField edgeField = ep.Edge;
//if (edgeField.EdgeDocID != null) { // This is a spilled edge
// JObject edgeDocument = this.connection.RetrieveDocumentById(edgeField.EdgeDocID);
// ((JArray)edgeDocument["_edge"])
// .First(edge => (string)edge["_srcV"] == edgeField.OutV && (long)edge["_offset"] == edgeField.Offset)
// [ep.PropertyName]
// .Remove();
// this.connection.ReplaceOrDeleteDocumentAsync(edgeField.EdgeDocID, edgeDocument).Wait();
//}
//else { // This is not a spilled edge
// JObject edgeDocument = this.connection.RetrieveDocumentById(edgeField.EdgeDocID);
// ((JArray)edgeDocument["_edge"])
// .First(edge => (string)edge["_srcV"] == edgeField.OutV && (long)edge["_offset"] == edgeField.Offset)
// [ep.PropertyName]
// .Remove();
// this.connection.ReplaceOrDeleteDocumentAsync(edgeField.EdgeDocID, edgeDocument).Wait();
//}
//// Update edge field
//bool found = edgeField.EdgeProperties.Remove(ep.PropertyName);
//Debug.Assert(found);
List <Tuple <WValueExpression, WValueExpression, int> > propertyList = new List <Tuple <WValueExpression, WValueExpression, int> >();
propertyList.Add(
new Tuple <WValueExpression, WValueExpression, int>(
new WValueExpression(ep.PropertyName, true),
new WValueExpression("null", false),
0));
UpdateEdgePropertiesOperator op = new UpdateEdgePropertiesOperator(
this.dummyInputOp,
this.connection,
0, 1,
propertyList
);
RawRecord record = new RawRecord();
record.Append(new StringField(ep.Edge.OutV));
record.Append(new StringField(ep.Edge.Offset.ToString()));
op.DataModify(record);
// Now VertexCacheObject has been updated (in DataModify)
Debug.Assert(!ep.Edge.EdgeProperties.ContainsKey(ep.PropertyName));
}
private void UpdatePropertiesOfEdge(EdgeField edge)
{
List <Tuple <WValueExpression, WValueExpression, int> > propertyList =
new List <Tuple <WValueExpression, WValueExpression, int> >();
foreach (WPropertyExpression property in this.updateProperties)
{
if (property.Cardinality == GremlinKeyword.PropertyCardinality.list ||
property.MetaProperties.Count > 0)
{
throw new Exception("Can't create meta property or duplicated property on edges");
}
propertyList.Add(new Tuple <WValueExpression, WValueExpression, int>(property.Key, property.Value, 0));
}
RawRecord record = new RawRecord();
record.Append(new StringField(edge.OutV));
record.Append(new StringField(edge.Offset.ToString()));
UpdateEdgePropertiesOperator op = new UpdateEdgePropertiesOperator(this.InputOperator, this.Connection, 0, 1, propertyList);
op.DataModify(record);
}