public GremlinMatchPath(GremlinFreeVertexVariable sourceVariable, GremlinFreeEdgeVariable edgeVariable, GremlinFreeVertexVariable sinkVariable, bool isReversed)
{
SourceVariable = sourceVariable;
EdgeVariable = edgeVariable;
SinkVariable = sinkVariable;
IsReversed = isReversed;
}
internal static WEdgeColumnReferenceExpression GetEdgeColumnReferenceExpr(GremlinFreeEdgeVariable edgeTable)
{
return(new WEdgeColumnReferenceExpression()
{
MultiPartIdentifier = GetMultiPartIdentifier("Edge"),
Alias = edgeTable.GetVariableName(),
MinLength = 1,
MaxLength = 1,
EdgeType = edgeTable.EdgeType
});
}
internal override void InE(GremlinToSqlContext currentContext, List <string> edgeLabels)
{
if (this.IsTraversalToBound)
{
base.InE(currentContext, edgeLabels);
return;
}
GremlinFreeEdgeVariable inEdge = new GremlinFreeEdgeVariable(WEdgeType.InEdge);
currentContext.VariableList.Add(inEdge);
currentContext.AddLabelPredicateForEdge(inEdge, edgeLabels);
currentContext.MatchPathList.Add(new GremlinMatchPath(null, inEdge, this, false));
currentContext.SetPivotVariable(inEdge);
}
internal override void OutE(GremlinToSqlContext currentContext, List <string> edgeLabels)
{
if (this.isTraversalToBound)
{
base.OutE(currentContext, edgeLabels);
return;
}
GremlinFreeEdgeVariable outEdgeVar = new GremlinFreeEdgeVariable(WEdgeType.OutEdge);
currentContext.VariableList.Add(outEdgeVar);
currentContext.AddLabelPredicateForEdge(outEdgeVar, edgeLabels);
currentContext.MatchPathList.Add(new GremlinMatchPath(this, outEdgeVar, null));
currentContext.SetPivotVariable(outEdgeVar);
}
internal override void Out(GremlinToSqlContext currentContext, List <string> edgeLabels)
{
if (this.IsTraversalToBound)
{
base.Out(currentContext, edgeLabels);
return;
}
GremlinFreeEdgeVariable outEdge = new GremlinFreeEdgeVariable(WEdgeType.OutEdge);
currentContext.VariableList.Add(outEdge);
currentContext.AddLabelPredicateForEdge(outEdge, edgeLabels);
GremlinFreeVertexVariable outVertex = new GremlinFreeVertexVariable();
currentContext.VariableList.Add(outVertex);
currentContext.TableReferencesInFromClause.Add(outVertex);
currentContext.MatchPathList.Add(new GremlinMatchPath(this, outEdge, outVertex, false));
currentContext.SetPivotVariable(outVertex);
}
internal override void In(GremlinToSqlContext currentContext, List <string> edgeLabels)
{
if (this.isTraversalToBound)
{
base.In(currentContext, edgeLabels);
return;
}
GremlinFreeEdgeVariable inEdge = new GremlinFreeEdgeVariable(WEdgeType.InEdge);
currentContext.VariableList.Add(inEdge);
currentContext.AddLabelPredicateForEdge(inEdge, edgeLabels);
GremlinFreeVertexVariable outVertex = new GremlinFreeVertexVariable();
currentContext.VariableList.Add(outVertex);
currentContext.TableReferences.Add(outVertex);
currentContext.MatchPathList.Add(new GremlinMatchPath(outVertex, inEdge, this));
currentContext.SetPivotVariable(outVertex);
}
internal override void Both(GremlinToSqlContext currentContext, List <string> edgeLabels)
{
if (this.IsTraversalToBound)
{
base.Both(currentContext, edgeLabels);
return;
}
GremlinFreeEdgeVariable bothEdge = new GremlinFreeEdgeVariable(WEdgeType.BothEdge);
currentContext.VariableList.Add(bothEdge);
currentContext.AddLabelPredicateForEdge(bothEdge, edgeLabels);
GremlinFreeVertexVariable bothVertex = new GremlinFreeVertexVariable();
currentContext.VariableList.Add(bothVertex);
// In this case, the both-edgeTable variable is not added to the table-reference list.
// Instead, we populate a path this_variable-[bothEdge]->bothVertex in the context
currentContext.TableReferencesInFromClause.Add(bothVertex);
currentContext.MatchPathList.Add(new GremlinMatchPath(this, bothEdge, bothVertex, false));
currentContext.SetPivotVariable(bothVertex);
}
public GremlinMatchPath(GremlinFreeVertexVariable sourceVariable, GremlinFreeEdgeVariable edgeVariable, GremlinFreeVertexVariable sinkVariable)
{
SourceVariable = sourceVariable;
EdgeVariable = edgeVariable;
SinkVariable = sinkVariable;
}