protected override Expression VisitEntityQueryable(Type elementType)
{
var relationalQueryCompilationContext
= ((RelationalQueryCompilationContext)QueryModelVisitor.QueryCompilationContext);
var queryMethodInfo = CreateValueReaderMethodInfo;
var entityType = QueryModelVisitor.QueryCompilationContext.Model.GetEntityType(elementType);
var selectExpression = new SelectExpression();
var tableName = entityType.TableName();
selectExpression
.AddTable(
new TableExpression(
tableName,
entityType.Schema(),
_querySource.ItemName.StartsWith("<generated>_")
? tableName.First().ToString().ToLower()
: _querySource.ItemName,
_querySource));
QueryModelVisitor._queriesBySource.Add(_querySource, selectExpression);
var queryMethodArguments
= new List <Expression>
{
Expression.Constant(_querySource),
QueryContextParameter,
QuerySourceScopeParameter,
_readerParameter
};
if (QueryModelVisitor.QuerySourceRequiresMaterialization(_querySource))
{
foreach (var property in entityType.Properties)
{
selectExpression.AddToProjection(property, _querySource);
}
queryMethodInfo = CreateEntityMethodInfo.MakeGenericMethod(elementType);
queryMethodArguments.Add(Expression.Constant(0));
queryMethodArguments.Add(Expression.Constant(entityType));
}
return(Expression.Call(
relationalQueryCompilationContext.QueryMethodProvider.QueryMethod
.MakeGenericMethod(queryMethodInfo.ReturnType),
QueryContextParameter,
Expression.Constant(new CommandBuilder(selectExpression, relationalQueryCompilationContext)),
Expression.Lambda(
Expression.Call(queryMethodInfo, queryMethodArguments),
_readerParameter)));
}
protected override Expression VisitEntityQueryable(Type elementType)
{
Check.NotNull(elementType, nameof(elementType));
var queryMethodInfo = CreateValueBufferMethodInfo;
var relationalQueryCompilationContext = QueryModelVisitor.QueryCompilationContext;
var entityType = relationalQueryCompilationContext.Model.GetEntityType(elementType);
var selectExpression = new SelectExpression();
var name = relationalQueryCompilationContext.RelationalExtensions.For(entityType).TableName;
var tableAlias
= _querySource.HasGeneratedItemName()
? name[0].ToString().ToLower()
: _querySource.ItemName;
var fromSqlAnnotation
= relationalQueryCompilationContext
.GetCustomQueryAnnotations(RelationalQueryableExtensions.FromSqlMethodInfo)
.LastOrDefault(a => a.QuerySource == _querySource);
var composable = true;
var sqlString = "";
object[] sqlParameters = null;
if (fromSqlAnnotation == null)
{
selectExpression.AddTable(
new TableExpression(
name,
relationalQueryCompilationContext.RelationalExtensions.For(entityType).Schema,
tableAlias,
_querySource));
}
else
{
sqlString = (string)fromSqlAnnotation.Arguments[1];
sqlParameters = (object[])fromSqlAnnotation.Arguments[2];
selectExpression.AddTable(
new RawSqlDerivedTableExpression(
sqlString,
sqlParameters,
tableAlias,
_querySource));
var sqlStart = sqlString.SkipWhile(char.IsWhiteSpace).Take(7).ToArray();
if (sqlStart.Length != 7 ||
!char.IsWhiteSpace(sqlStart.Last()) ||
!new string(sqlStart).StartsWith("SELECT", StringComparison.OrdinalIgnoreCase))
{
if (relationalQueryCompilationContext.QueryAnnotations
.OfType <IncludeQueryAnnotation>().Any())
{
throw new InvalidOperationException(Strings.StoredProcedureIncludeNotSupported);
}
QueryModelVisitor.RequiresClientEval = true;
composable = false;
}
if (!fromSqlAnnotation.QueryModel.BodyClauses.Any() &&
!fromSqlAnnotation.QueryModel.ResultOperators.Any())
{
composable = false;
}
}
QueryModelVisitor.AddQuery(_querySource, selectExpression);
var queryMethodArguments
= new List <Expression>
{
Expression.Constant(_querySource),
EntityQueryModelVisitor.QueryContextParameter,
EntityQueryModelVisitor.QueryResultScopeParameter,
_valueBufferParameter,
Expression.Constant(0)
};
if (QueryModelVisitor.QueryCompilationContext
.QuerySourceRequiresMaterialization(_querySource) ||
QueryModelVisitor.RequiresClientEval)
{
var materializer
= new MaterializerFactory(
relationalQueryCompilationContext
.EntityMaterializerSource)
.CreateMaterializer(
entityType,
selectExpression,
(p, se) =>
se.AddToProjection(
relationalQueryCompilationContext.RelationalExtensions.For(p).ColumnName,
p,
_querySource),
QueryModelVisitor.QueryCompilationContext.RelationalExtensions,
_querySource);
queryMethodInfo
= CreateEntityMethodInfo.MakeGenericMethod(elementType);
var keyFactory
= relationalQueryCompilationContext.EntityKeyFactorySource
.GetKeyFactory(entityType.GetPrimaryKey());
queryMethodArguments.AddRange(
new[]
{
Expression.Constant(entityType),
Expression.Constant(QueryModelVisitor.QuerySourceRequiresTracking(_querySource)),
Expression.Constant(keyFactory),
Expression.Constant(entityType.GetPrimaryKey().Properties),
materializer
});
}
Func <ISqlQueryGenerator> sqlQueryGeneratorFactory;
if (composable)
{
sqlQueryGeneratorFactory = () =>
relationalQueryCompilationContext.CreateSqlQueryGenerator(selectExpression);
}
else
{
sqlQueryGeneratorFactory = () =>
new RawSqlQueryGenerator(selectExpression, sqlString, sqlParameters, relationalQueryCompilationContext.TypeMapper);
}
return(Expression.Call(
relationalQueryCompilationContext.QueryMethodProvider.ShapedQueryMethod
.MakeGenericMethod(queryMethodInfo.ReturnType),
EntityQueryModelVisitor.QueryContextParameter,
Expression.Constant(
new CommandBuilder(
sqlQueryGeneratorFactory,
relationalQueryCompilationContext.ValueBufferFactoryFactory)),
Expression.Lambda(
Expression.Call(queryMethodInfo, queryMethodArguments),
_valueBufferParameter)));
}