/// <summary>
/// This API supports the Entity Framework Core infrastructure and is not intended to be used
/// directly from your code. This API may change or be removed in future releases.
/// </summary>
protected override Expression VisitExtension(Expression expression)
{
var selectExpression = expression as SelectExpression;
if (selectExpression?.Predicate != null)
{
var predicate = new EqualityPredicateInExpressionOptimizer().Visit(selectExpression.Predicate);
var predicateNegationExpressionOptimizer = new PredicateNegationExpressionOptimizer();
predicate = predicateNegationExpressionOptimizer.Visit(predicate);
predicate = new PredicateReductionExpressionOptimizer().Visit(predicate);
predicate = new EqualityPredicateExpandingVisitor().Visit(predicate);
predicate = predicateNegationExpressionOptimizer.Visit(predicate);
if (_useRelationalNulls)
{
predicate = new NotNullableExpression(predicate);
}
selectExpression.Predicate = predicate;
}
return(base.VisitExtension(expression));
}
public override Expression Visit(
[NotNull] Expression expression)
{
var currentExpression = expression;
var inExpressionOptimized =
new EqualityPredicateInExpressionOptimizer().Visit(currentExpression);
currentExpression = inExpressionOptimized;
var negationOptimized1 =
new PredicateNegationExpressionOptimizer()
.Visit(currentExpression);
currentExpression = negationOptimized1;
var equalityExpanded =
new EqualityPredicateExpandingVisitor().Visit(currentExpression);
currentExpression = equalityExpanded;
var negationOptimized2 =
new PredicateNegationExpressionOptimizer()
.Visit(currentExpression);
currentExpression = negationOptimized2;
var parameterDectector = new ParameterExpressionDetectingVisitor();
parameterDectector.Visit(currentExpression);
if (!parameterDectector.ContainsParameters &&
!_useRelationalNullSemantics)
{
var optimizedNullExpansionVisitor = new NullSemanticsOptimizedExpandingVisitor();
var nullSemanticsExpandedOptimized = optimizedNullExpansionVisitor.Visit(currentExpression);
if (optimizedNullExpansionVisitor.OptimizedExpansionPossible)
{
currentExpression = nullSemanticsExpandedOptimized;
}
else
{
currentExpression = new NullSemanticsExpandingVisitor()
.Visit(currentExpression);
}
}
if (_useRelationalNullSemantics)
{
currentExpression = new NotNullableExpression(currentExpression);
}
var negationOptimized3 =
new PredicateNegationExpressionOptimizer()
.Visit(currentExpression);
currentExpression = negationOptimized3;
return(currentExpression);
}
public override Expression Visit([NotNull] Expression node)
{
node = new EqualityPredicateInExpressionOptimizer().Visit(node);
var predicateNegationExpressionOptimizer = new PredicateNegationExpressionOptimizer();
node = predicateNegationExpressionOptimizer.Visit(node);
node = new EqualityPredicateExpandingVisitor().Visit(node);
node = predicateNegationExpressionOptimizer.Visit(node);
if (_useRelationalNulls)
{
node = new NotNullableExpression(node);
}
return(node);
}
/// <summary>
/// This API supports the Entity Framework Core infrastructure and is not intended to be used
/// directly from your code. This API may change or be removed in future releases.
/// </summary>
public override Expression Visit(Expression expression)
{
if (expression != null)
{
expression = new EqualityPredicateInExpressionOptimizer().Visit(expression);
var predicateNegationExpressionOptimizer = new PredicateNegationExpressionOptimizer();
expression = predicateNegationExpressionOptimizer.Visit(expression);
expression = new PredicateReductionExpressionOptimizer().Visit(expression);
expression = new EqualityPredicateExpandingVisitor().Visit(expression);
expression = predicateNegationExpressionOptimizer.Visit(expression);
if (_useRelationalNulls)
{
expression = new NotNullableExpression(expression);
}
}
return(expression);
}
