private WSelectQueryBlock GetSelectQueryBlock(GremlinToSqlContext context)
{
if (context == null)
{
return(SqlUtil.GetSimpleSelectQueryBlock(InputVariable.DefaultProjection()));
}
else
{
return(context.ToSelectQueryBlock());
}
}
public override WTableReference ToTableReference()
{
List <WScalarExpression> parameters = new List <WScalarExpression>();
parameters.Add(SqlUtil.GetValueExpr(GremlinKeyword.Label));
parameters.Add(SqlUtil.GetValueExpr(VertexLabel));
for (var i = 0; i < VertexProperties.Count; i += 2)
{
parameters.Add(SqlUtil.GetValueExpr(VertexProperties[i]));
parameters.Add(SqlUtil.GetValueExpr(VertexProperties[i + 1]));
}
var firstTableRef = IsFirstTableReference ? SqlUtil.GetDerivedTable(SqlUtil.GetSimpleSelectQueryBlock("1"), "_") : null;
var secondTableRef = SqlUtil.GetFunctionTableReference(GremlinKeyword.func.AddV, parameters, this, GetVariableName());
return(SqlUtil.GetCrossApplyTableReference(firstTableRef, secondTableRef));
}
public override WTableReference ToTableReference()
{
List <WScalarExpression> parameters = new List <WScalarExpression>();
parameters.Add(SqlUtil.GetValueExpr(VertexLabel));
foreach (var vertexProperty in VertexProperties)
{
parameters.Add(vertexProperty.ToPropertyExpr());
}
foreach (string property in this.ProjectedProperties)
{
parameters.Add(SqlUtil.GetValueExpr(property));
}
var secondTableRef = SqlUtil.GetFunctionTableReference(GremlinKeyword.func.AddV, parameters, GetVariableName());
var crossApplyTableRef = SqlUtil.GetCrossApplyTableReference(secondTableRef);
crossApplyTableRef.FirstTableRef = IsFirstTableReference ? SqlUtil.GetDerivedTable(SqlUtil.GetSimpleSelectQueryBlock("1"), "_") : null;
return(crossApplyTableRef);
}
public override WTableReference ToTableReference()
{
List <WScalarExpression> parameters = new List <WScalarExpression>();
parameters.Add(SqlUtil.GetScalarSubquery(GetSelectQueryBlock(this.FromVertexContext)));
parameters.Add(SqlUtil.GetScalarSubquery(GetSelectQueryBlock(this.ToVertexContext)));
if (this.ToVertexContext == null && this.FromVertexContext != null)
{
this.OtherVIndex = 0;
}
if (this.ToVertexContext != null && this.FromVertexContext == null)
{
this.OtherVIndex = 1;
}
if (this.ToVertexContext != null && this.FromVertexContext != null)
{
this.OtherVIndex = 1;
}
parameters.Add(SqlUtil.GetValueExpr(this.OtherVIndex));
parameters.Add(SqlUtil.GetValueExpr(this.EdgeLabel));
parameters.AddRange(this.EdgeProperties.Select(property => property.ToPropertyExpr()));
var secondTableRef = SqlUtil.GetFunctionTableReference(GremlinKeyword.func.AddE, parameters, GetVariableName());
var crossApplyTableRef = SqlUtil.GetCrossApplyTableReference(secondTableRef);
crossApplyTableRef.FirstTableRef = this.IsFirstTableReference ? SqlUtil.GetDerivedTable(SqlUtil.GetSimpleSelectQueryBlock("1"), "_") : null;
return(SqlUtil.GetCrossApplyTableReference(crossApplyTableRef));
}
public override WTableReference ToTableReference()
{
List <WScalarExpression> parameters = new List <WScalarExpression>();
parameters.Add(SqlUtil.GetValueExpr(this.VertexLabel));
parameters.AddRange(this.VertexProperties.Select(property => property.ToPropertyExpr()));
var secondTableRef = SqlUtil.GetFunctionTableReference(GremlinKeyword.func.AddV, parameters, GetVariableName());
var crossApplyTableRef = SqlUtil.GetCrossApplyTableReference(secondTableRef);
crossApplyTableRef.FirstTableRef = this.IsFirstTableReference ? SqlUtil.GetDerivedTable(SqlUtil.GetSimpleSelectQueryBlock("1"), "_") : null;
return(crossApplyTableRef);
}
