protected override BoundRelation RewriteTableRelation(BoundTableRelation node)
{
var definedValues = RemoveUnusedSlots(node.DefinedValues, d => d.ValueSlot);
node = node.Update(node.TableInstance, definedValues);
return(base.RewriteTableRelation(node));
}
protected override BoundRelation RewriteTableRelation(BoundTableRelation node)
{
if (!node.DefinedValues.Any())
{
return(node);
}
var factory = node.DefinedValues.First().ValueSlot.Factory;
var original = node.TableInstance;
var valueSlotMapping = original.ColumnInstances.ToDictionary(c => c.Column, c => _valueSlotMapping[c.ValueSlot]);
var instanceName = factory.CreateNamed(original.Name, typeof(int)).Name;
var instance = new TableInstanceSymbol(instanceName, original.Table, (t, c) => valueSlotMapping[c]);
var columnMapping = instance.ColumnInstances.ToDictionary(c => c.Column);
var definedValues = node.DefinedValues.Select(d => columnMapping[d.Column]).ToImmutableArray();
return(node.Update(instance, definedValues));
}
