public override void Visit(ProjectOp op, System.Data.Entity.Core.Query.InternalTrees.Node n)
{
this.VisitChildren(n);
ExtendedNodeInfo extendedNodeInfo = n.Child0.GetExtendedNodeInfo(this.m_command);
if (!extendedNodeInfo.Keys.NoKeys)
{
VarVec varVec = this.m_command.CreateVarVec(op.Outputs);
Dictionary <Var, Var> varRemappings = NodeInfoVisitor.ComputeVarRemappings(n.Child1);
VarVec other = extendedNodeInfo.Keys.KeyVars.Remap(varRemappings);
varVec.Or(other);
op.Outputs.InitFrom(varVec);
}
this.m_command.RecomputeNodeInfo(n);
}
/// <summary>
/// Pulls up keys for a ProjectOp. First visits its children to pull
/// up its keys; then identifies any keys from the input that it may have
/// projected out - and adds them to the output list of vars
/// </summary>
/// <param name="op">Current ProjectOp</param>
/// <param name="n">Current subtree</param>
public override void Visit(ProjectOp op, Node n)
{
VisitChildren(n);
ExtendedNodeInfo childNodeInfo = n.Child0.GetExtendedNodeInfo(m_command);
if (!childNodeInfo.Keys.NoKeys)
{
VarVec outputVars = m_command.CreateVarVec(op.Outputs);
// NOTE: This code appears in NodeInfoVisitor as well. Try to see if we
// can share this somehow.
Dictionary <Var, Var> varRenameMap = NodeInfoVisitor.ComputeVarRemappings(n.Child1);
VarVec mappedKeyVec = childNodeInfo.Keys.KeyVars.Remap(varRenameMap);
outputVars.Or(mappedKeyVec);
op.Outputs.InitFrom(outputVars);
}
m_command.RecomputeNodeInfo(n);
}