protected override Expression VisitInsert(InsertCommandExpression insert)
{
var oInsert = insert as OInsertCommandExpression;
if (oInsert == null) return base.VisitInsert(insert);
var table = (IdentifiableExpression)this.Visit(oInsert.Identifiable);
var assignments = this.VisitFieldAssignments(oInsert.Assignments);
var projection = this.VisitProjection(oInsert.Projection);
return this.UpdateInsert(oInsert, table, assignments, (ProjectionExpression)projection);
}
protected virtual Expression VisitInsert(InsertCommandExpression insert)
{
var table = (IdentifiableExpression)this.Visit(insert.Identifiable);
var assignments = this.VisitFieldAssignments(insert.Assignments);
return this.UpdateInsert(insert, table, assignments);
}
protected override Expression VisitInsert(InsertCommandExpression insert)
{
this.Write("INSERT INTO ");
this.WriteIdentifiableName(insert.Identifiable.Name);
this.Write("(");
for (int i = 0, n = insert.Assignments.Count; i < n; i++)
{
FieldAssignment ca = insert.Assignments[i];
if (i > 0) this.Write(", ");
this.WriteFieldName(ca. Field.Name);
}
this.Write(")");
this.WriteLine(Indentation.Same);
this.Write("VALUES (");
for (int i = 0, n = insert.Assignments.Count; i < n; i++)
{
FieldAssignment ca = insert.Assignments[i];
if (i > 0) this.Write(", ");
this.Visit(ca.Expression);
}
this.Write(")");
return insert;
}
protected virtual InsertCommandExpression UpdateInsert(InsertCommandExpression insert, IdentifiableExpression table, IEnumerable<FieldAssignment> assignments)
{
if (table != insert.Identifiable || assignments != insert.Assignments)
{
return new InsertCommandExpression(table, assignments);
}
return insert;
}
protected virtual void VisitInsertThing(InsertCommandExpression insert)
{
this.Write("INSERT INTO ");
this.WriteIdentifiableName(insert.Identifiable.Entity.StorageClass);
this.Write("(");
for (int i = 0, n = insert.Assignments.Count; i < n; i++)
{
FieldAssignment ca = insert.Assignments[i];
if (i > 0) this.Write(", ");
this.WriteFieldName(ca.Field.Name);
}
this.Write(")");
this.WriteLine(Indentation.Same);
this.Write("VALUES (");
for (int i = 0, n = insert.Assignments.Count; i < n; i++)
{
FieldAssignment ca = insert.Assignments[i];
if (i > 0) this.Write(", ");
this.Visit(ca.Expression);
}
this.Write(") RETURN @this");
}
protected virtual void VisitInsertAssociation(InsertCommandExpression insert)
{
this.Write("CREATE EDGE ");
this.WriteIdentifiableName(insert.Identifiable.Entity.StorageClass);
this.Write(" FROM ");
this.Visit(insert.Assignments.Single(fa => fa.Field.Name.Equals("out")).Expression);
this.Write(" TO ");
this.Visit(insert.Assignments.Single(fa => fa.Field.Name.Equals("in")).Expression);
if (insert.Assignments.Count > 2)
{
this.Write(" SET ");
bool comma = false;
foreach (var assignment in insert.Assignments.Where(fa => fa.Field.Name != "out" && fa.Field.Name != "in"))
{
if (comma) this.Write(", ");
this.Visit(assignment.Field);
this.Write(" = ");
if (assignment.Expression is ConstantExpression)
{
this.Write(((ConstantExpression)assignment.Expression).Value.ToOrientValueString(assignment.Field.Type));
}
else
{
this.Visit(assignment.Expression);
}
comma = true;
}
}
}
protected override Expression VisitInsert(InsertCommandExpression insert)
{
if (insert.Identifiable.Entity.EntityType.Implements<IAssociation>())
{
VisitInsertAssociation(insert);
}
else if (insert.Identifiable.Entity.EntityType.Implements<IThing>())
{
VisitInsertThing(insert);
}
return insert;
}
protected virtual bool CompareInsert(InsertCommandExpression x, InsertCommandExpression y)
{
return this.Compare(x.Identifiable, y.Identifiable)
&& this.CompareFieldAssignments(x.Assignments, y.Assignments);
}
protected override Expression VisitInsert(InsertCommandExpression insert)
{
return base.VisitInsert(insert);
}
