public override Expression VisitExpression(Expression expression)
{
try
{
var projectConstantsInHql = _stateStack.Peek() ||
expression != null && IsRegisteredFunction(expression);
// Set some flags, unless we already have proper values for them:
// projectConstantsInHql if they are inside a method call executed server side.
// ContainsUntranslatedMethodCalls if a method call must be executed locally.
var isMethodCall = expression != null && expression.NodeType == ExpressionType.Call;
if (isMethodCall && (!projectConstantsInHql || !ContainsUntranslatedMethodCalls))
{
var isRegisteredFunction = IsRegisteredFunction(expression);
projectConstantsInHql = projectConstantsInHql || isRegisteredFunction;
ContainsUntranslatedMethodCalls = ContainsUntranslatedMethodCalls || !isRegisteredFunction;
}
_stateStack.Push(projectConstantsInHql);
if (expression == null)
{
return(null);
}
bool saveCanBeCandidate = _canBeCandidate;
_canBeCandidate = true;
if (CanBeEvaluatedInHqlStatementShortcut(expression))
{
HqlCandidates.Add(expression);
return(expression);
}
base.VisitExpression(expression);
if (_canBeCandidate)
{
if (CanBeEvaluatedInHqlSelectStatement(expression, projectConstantsInHql))
{
HqlCandidates.Add(expression);
}
else
{
_canBeCandidate = false;
}
}
_canBeCandidate = _canBeCandidate & saveCanBeCandidate;
}
finally
{
_stateStack.Pop();
}
return(expression);
}
public override Expression Visit(Expression expression)
{
if (expression == null)
{
return(null);
}
if (expression is NhNominatedExpression nominatedExpression)
{
// Add the nominated clause and strip the nominator wrapper from the select expression
var innerExpression = nominatedExpression.Expression;
HqlCandidates.Add(innerExpression);
return(innerExpression);
}
var projectConstantsInHql = _stateStack.Peek() || expression.NodeType == ExpressionType.Equal || IsRegisteredFunction(expression);
// Set some flags, unless we already have proper values for them:
// projectConstantsInHql if they are inside a method call executed server side.
// ContainsUntranslatedMethodCalls if a method call must be executed locally.
var isMethodCall = expression.NodeType == ExpressionType.Call;
if (isMethodCall && (!projectConstantsInHql || !ContainsUntranslatedMethodCalls))
{
var isRegisteredFunction = IsRegisteredFunction(expression);
projectConstantsInHql = projectConstantsInHql || isRegisteredFunction;
ContainsUntranslatedMethodCalls = ContainsUntranslatedMethodCalls || !isRegisteredFunction;
}
_stateStack.Push(projectConstantsInHql);
bool saveCanBeCandidate = _canBeCandidate;
_canBeCandidate = true;
try
{
if (CanBeEvaluatedInHqlStatementShortcut(expression))
{
HqlCandidates.Add(expression);
return(expression);
}
expression = base.Visit(expression);
if (_canBeCandidate)
{
if (CanBeEvaluatedInHqlSelectStatement(expression, projectConstantsInHql))
{
HqlCandidates.Add(expression);
}
else
{
_canBeCandidate = false;
}
}
}
finally
{
_stateStack.Pop();
_canBeCandidate = _canBeCandidate && saveCanBeCandidate;
}
return(expression);
}