public ExpressionCacheKey(SqlProjectionExpression expression, LambdaExpression projector)
: this()
{
this.expression = expression;
this.projector = projector;
this.hash = SqlExpressionHasher.Hash(expression, SqlExpressionComparerOptions.IgnoreConstantPlaceholders) ^ SqlExpressionHasher.Hash(projector);
}
protected override Expression VisitProjection(SqlProjectionExpression projection)
{
var saveInProjection = this.inProjection;
this.inProjection = true;
base.VisitProjection(projection);
this.inProjection = saveInProjection;
return projection;
}
protected static SqlProjectionExpression UpdateProjection(SqlProjectionExpression projectionExpression, SqlSelectExpression select, Expression projector, LambdaExpression aggregator)
{
if (select != projectionExpression.Select || projector != projectionExpression.Projector || aggregator != projectionExpression.Aggregator)
{
return new SqlProjectionExpression(select, projector, aggregator, projectionExpression.IsElementTableProjection, projectionExpression.SelectFirstType, projectionExpression.DefaultValueExpression, projectionExpression.IsDefaultIfEmpty);
}
return projectionExpression;
}
protected static SqlProjectionExpression UpdateProjection(SqlProjectionExpression projectionExpression, SqlSelectExpression select, Expression projector, LambdaExpression aggregator)
{
if (select != projectionExpression.Select || projector != projectionExpression.Projector || aggregator != projectionExpression.Aggregator)
{
return(new SqlProjectionExpression(select, projector, aggregator, projectionExpression.IsElementTableProjection, projectionExpression.SelectFirstType, projectionExpression.DefaultValueExpression, projectionExpression.IsDefaultIfEmpty));
}
return(projectionExpression);
}
protected override Expression VisitProjection(SqlProjectionExpression projection)
{
if (hasAggregate)
{
return projection;
}
return base.VisitProjection(projection);
}
protected override Expression VisitProjection(SqlProjectionExpression projection)
{
// Visit mapping in reverse order
var projector = this.Visit(projection.Projector);
var select = (SqlSelectExpression)this.Visit(projection.Select);
return UpdateProjection(projection, select, projector, projection.Aggregator);
}
protected override Expression VisitProjection(SqlProjectionExpression projection)
{
var previousProjection = this.currentProjection;
this.currentProjection = projection;
var retval = base.VisitProjection(projection);
this.currentProjection = previousProjection;
return retval;
}
protected override Expression VisitProjection(SqlProjectionExpression projection)
{
SqlProjectionExpression current;
if (!TryGetCurrent(projection, out current))
{
return(projection);
}
result = result && (current.IsDefaultIfEmpty == projection.IsDefaultIfEmpty &&
current.IsElementTableProjection == projection.IsElementTableProjection &&
current.SelectFirstType == projection.SelectFirstType);
if (!result)
{
return(projection);
}
currentObject = current.Aggregator;
Visit(projection.Aggregator);
if (!result)
{
return(projection);
}
currentObject = current.DefaultValueExpression;
Visit(projection.DefaultValueExpression);
if (!result)
{
return(projection);
}
currentObject = current.Projector;
Visit(projection.Projector);
if (!result)
{
return(projection);
}
currentObject = current.Select;
Visit(projection.Select);
if (!result)
{
return(projection);
}
return(projection);
}
protected override Expression VisitProjection(SqlProjectionExpression projection)
{
var source = (SqlSelectExpression)this.Visit(projection.Select);
var projector = this.Visit(projection.Projector);
var aggregator = (LambdaExpression) this.Visit(projection.Aggregator);
if (source != projection.Select || projector != projection.Projector || aggregator != projection.Aggregator)
{
return new SqlProjectionExpression(source, projector, aggregator, projection.IsElementTableProjection);
}
return projection;
}
protected virtual Expression VisitProjection(SqlProjectionExpression projection)
{
var source = (SqlSelectExpression)Visit(projection.Select);
var projector = Visit(projection.Projector);
var defaulValueExpression = Visit(projection.DefaultValueExpression);
var aggregator = (LambdaExpression)Visit(projection.Aggregator);
if (source != projection.Select || projector != projection.Projector || defaulValueExpression != projection.DefaultValueExpression || aggregator != projection.Aggregator)
{
return(new SqlProjectionExpression(source, projector, aggregator, projection.IsElementTableProjection, projection.SelectFirstType, projection.DefaultValueExpression, projection.IsDefaultIfEmpty));
}
return(projection);
}
protected override Expression VisitProjection(SqlProjectionExpression projection)
{
projection = (SqlProjectionExpression)base.VisitProjection(projection);
if (projection.Select.From is SqlSelectExpression)
{
var redundantQueries = RedundantSubqueryFinder.Find(projection.Select);
if (redundantQueries != null)
{
projection = SubqueryRemover.Remove(projection, redundantQueries);
}
}
return projection;
}
protected override Expression VisitFunctionCall(SqlFunctionCallExpression functionCallExpression)
{
if (functionCallExpression.Function == SqlFunction.In)
{
if (functionCallExpression.Arguments[0].NodeType == ExpressionType.Constant && functionCallExpression.Arguments[1].NodeType == (ExpressionType)SqlExpressionType.Projection)
{
var projector = (SqlProjectionExpression)functionCallExpression.Arguments[1];
if (projector.Select.Where == null && projector.Select.Columns.Count == 1)
{
var newWhere = Expression.Equal(functionCallExpression.Arguments[0], projector.Select.Columns[0].Expression);
var newSelect = projector.Select.ChangeWhere(newWhere);
var newProjection = new SqlProjectionExpression(newSelect, projector, projector.Aggregator);
return new SqlFunctionCallExpression(functionCallExpression.Type, SqlFunction.Exists, new Expression[] { newProjection });
}
}
}
return base.VisitFunctionCall(functionCallExpression);
}
private SqlNullComparisonCoalescer(SqlProjectionExpression rootProjection)
{
this.ignoreExpression = rootProjection.Projector;
}
public SqlInsertIntoExpression ChangeSourceAndValueExpressions(SqlProjectionExpression source, IReadOnlyList <Expression> valueExpressions)
{
return(new SqlInsertIntoExpression(source, this.ColumnNames, this.ReturningAutoIncrementColumnNames, valueExpressions, this.WithExpression, this.RequiresIdentityInsert));
}
protected override Expression VisitProjection(SqlProjectionExpression expression)
{
SqlProjectionExpression current;
if (!TryGetCurrent(expression, out current))
{
return expression;
}
if (!(this.result &= current.IsElementTableProjection == expression.IsElementTableProjection))
{
return expression;
}
if (!(this.result &= current.NodeType == expression.NodeType))
{
return expression;
}
if (!(this.result &= current.Type == expression.Type))
{
return expression;
}
this.currentObject = current.DefaultValue;
this.Visit(expression.DefaultValue);
if (!this.result)
{
return expression;
}
this.currentObject = current.Select;
this.VisitSelect(expression.Select);
if (!this.result)
{
return expression;
}
this.currentObject = current.Projector;
this.Visit(expression.Projector);
if (!this.result)
{
return expression;
}
this.currentObject = current.Aggregator;
this.VisitLambda(expression.Aggregator);
if (!this.result)
{
return expression;
}
this.currentObject = current;
return expression;
}
public static SqlProjectionExpression Remove(SqlProjectionExpression projection, params SqlSelectExpression[] selectsToRemove)
{
return Remove(projection, (IEnumerable<SqlSelectExpression>)selectsToRemove);
}
protected override Expression VisitProjection(SqlProjectionExpression projectionExpression)
{
if (typeof(RelatedDataAccessObjects<>).IsAssignableFromIgnoreGenericParameters(projectionExpression.Type))
{
var elementType = projectionExpression.Type.GetGenericArguments()[0];
var originalPlaceholderCount = 0;
var currentPlaceholderCount = originalPlaceholderCount;
var replacedExpressions = new List<Expression>();
projectionExpression = (SqlProjectionExpression)SqlOuterQueryReferencePlaceholderSubstitutor.Substitute(projectionExpression, ref currentPlaceholderCount, replacedExpressions);
var values = replacedExpressions.Select(c => Expression.Convert(this.Visit(c), typeof(object))).ToList();
var where = projectionExpression.Select.Where;
var typeDescriptor = this.dataAccessModel.TypeDescriptorProvider.GetTypeDescriptor(elementType);
var columns = QueryBinder.GetColumnInfos(this.dataAccessModel.TypeDescriptorProvider, typeDescriptor.PersistedProperties);
var columnExpression = (SqlColumnExpression)SqlExpressionFinder.FindFirst(where, c => c.NodeType == (ExpressionType)SqlExpressionType.Column);
var match = columns.Single(d => d.ColumnName == columnExpression.Name);
var reference = Expression.Call(Expression.Constant(this.dataAccessModel), MethodInfoFastRef.DataAccessModelGetReferenceByValuesMethod.MakeGenericMethod(match.ForeignType.Type), Expression.NewArrayInit(typeof(object), values));
var property = typeDescriptor.GetRelationshipInfos().Single(c => c.ReferencingProperty == match.RootProperty).TargetProperty;
return Expression.Convert(Expression.Property(reference, property), this.dataAccessModel.GetConcreteTypeFromDefinitionType(property.PropertyType));
}
else
{
var currentPlaceholderCount = 0;
var replacedExpressions = new List<Expression>();
projectionExpression = (SqlProjectionExpression)SqlOuterQueryReferencePlaceholderSubstitutor.Substitute(projectionExpression, ref currentPlaceholderCount, replacedExpressions);
var newColumnIndexes = projectionExpression.Select.Columns.Select((c, i) => new { c.Name, i }).ToDictionary(d => d.Name, d => d.i);
var savedScope = this.scope;
this.scope = new ProjectionBuilderScope(newColumnIndexes);
var projectionProjector = Expression.Lambda(this.Visit(projectionExpression.Projector), objectProjector, dataReader, versionParameter, dynamicParameters, filterParameter);
Expression rootKeys;
if (this.scope.rootPrimaryKeys.Count > 0)
{
rootKeys = Expression.Quote(Expression.Lambda<Func<IDataReader, object[]>>(Expression.NewArrayInit(typeof(object), this.scope.rootPrimaryKeys), this.dataReader));
}
else
{
rootKeys = Expression.Constant(null, typeof(Expression<Func<IDataReader, object[]>>));
}
this.scope = savedScope;
var values = replacedExpressions.Select(c => (Expression)Expression.Convert(Visit(c), typeof(object))).ToList();
var method = TypeUtils.GetMethod<SqlQueryProvider>(c => c.BuildExecution(default(SqlProjectionExpression), default(LambdaExpression), default(object[]), default(Expression<Func<IDataReader, object[]>>)));
MethodInfo evaluate;
if (projectionExpression.Type.GetSequenceElementType() == null)
{
evaluate = MethodInfoFastRef.ExecutionBuildResultEvaluateMethod.MakeGenericMethod(projectionExpression.Type);
}
else
{
evaluate = MethodInfoFastRef.ExecutionBuildResultEvaluateMethod.MakeGenericMethod(typeof(IEnumerable<>).MakeGenericType(projectionExpression.Type.GetSequenceElementType()));
}
return Expression.Call(Expression.Call(Expression.Property(this.objectProjector, "QueryProvider"), method, Expression.Constant(SqlAggregateProjectionNormalizer.Normalize(projectionExpression)), projectionProjector, Expression.NewArrayInit(typeof(object), values), rootKeys), evaluate);
}
}
protected virtual Expression VisitProjection(SqlProjectionExpression projection)
{
var source = (SqlSelectExpression)Visit(projection.Select);
var projector = Visit(projection.Projector);
var defaulValueExpression = Visit(projection.DefaultValueExpression);
var aggregator = (LambdaExpression)Visit(projection.Aggregator);
if (source != projection.Select || projector != projection.Projector || defaulValueExpression != projection.DefaultValueExpression || aggregator != projection.Aggregator)
{
return new SqlProjectionExpression(source, projector, aggregator, projection.IsElementTableProjection, projection.SelectFirstType, projection.DefaultValueExpression, projection.IsDefaultIfEmpty);
}
return projection;
}
protected override Expression VisitProjection(SqlProjectionExpression projection)
{
return(base.VisitProjection(projection));
}
protected override Expression VisitProjection(SqlProjectionExpression projection)
{
var subQuery = Expression.Lambda(projection, this.objectProjector);
var elementType = TypeHelper.GetElementType(subQuery.Body.Type);
var boundExecuteSubQueryMethod = ExecuteSubQueryMethod.MakeGenericMethod(elementType);
return Expression.Convert(Expression.Call(this.objectProjector, boundExecuteSubQueryMethod, Expression.Constant(subQuery), this.dataReader), projection.Type);
}
public SqlInsertIntoExpression ChangeSourceAndValueExpressions(SqlProjectionExpression source, IReadOnlyList<Expression> valueExpressions)
{
return new SqlInsertIntoExpression(source, this.ColumnNames, this.ReturningAutoIncrementColumnNames, valueExpressions);
}
public ProjectorExpressionCacheInfo(SqlProjectionExpression projectionExpression, SqlQueryFormatResult formatResult)
: this()
{
this.projectionExpression = projectionExpression;
this.formatResult = formatResult;
}
public static SqlProjectionExpression Remove(SqlProjectionExpression projection, IEnumerable<SqlSelectExpression> selectsToRemove)
{
return (SqlProjectionExpression)new SubqueryRemover(selectsToRemove).Visit(projection);
}
protected override Expression VisitProjection(SqlProjectionExpression expression)
{
this.hashCode ^= expression.IsElementTableProjection ? -751039749 : 0;
return(base.VisitProjection(expression));
}
protected override Expression VisitProjection(SqlProjectionExpression expression)
{
this.hashCode ^= expression.IsElementTableProjection ? -751039749 : 0;
return base.VisitProjection(expression);
}
protected override Expression VisitProjection(SqlProjectionExpression projection)
{
var previousCurrentProjectShouldBeDefaultIfEmpty = this.currentProjectShouldBeDefaultIfEmpty;
this.currentProjectShouldBeDefaultIfEmpty = projection.IsDefaultIfEmpty;
var retval = this.Visit(projection.Select);
this.currentProjectShouldBeDefaultIfEmpty = previousCurrentProjectShouldBeDefaultIfEmpty;
return retval;
}
protected override Expression VisitProjection(SqlProjectionExpression projection)
{
var source = (SqlSelectExpression) this.Visit(projection.Select);
var oldInProjector = this.inProjector;
this.inProjector = true;
Expression projector;
try
{
projector = this.Visit(projection.Projector);
}
finally
{
this.inProjector = oldInProjector;
}
var aggregator = (LambdaExpression) this.Visit(projection.Aggregator);
if (source != projection.Select
|| projector != projection.Projector
|| aggregator != projection.Aggregator)
{
return new SqlProjectionExpression(source, projector, aggregator, projection.IsElementTableProjection, projection.SelectFirstType, projection.DefaultValueExpression, projection.IsDefaultIfEmpty);
}
return projection;
}
protected override Expression VisitProjection(SqlProjectionExpression projection)
{
var retval = this.Visit(projection.Select);
return retval;
}
protected override Expression VisitProjection(SqlProjectionExpression projection)
{
var saveProjection = this.currentProjection;
try
{
this.currentProjection = projection;
return base.VisitProjection(projection);
}
finally
{
this.currentProjection = saveProjection;
}
}
protected virtual Expression VisitProjection(SqlProjectionExpression projection)
{
var source = (SqlSelectExpression)this.Visit(projection.Select);
var projector = this.Visit(projection.Projector);
var defaulValueExpression = this.Visit(projection.DefaultValue);
var aggregator = (LambdaExpression)this.Visit(projection.Aggregator);
var defaultValue = this.Visit(projection.DefaultValue);
if (source != projection.Select || projector != projection.Projector || defaulValueExpression != projection.DefaultValue || aggregator != projection.Aggregator || defaultValue != projection.DefaultValue)
{
return new SqlProjectionExpression(projection.Type, source, projector, aggregator, projection.IsElementTableProjection, projection.DefaultValue);
}
return projection;
}
