public void Prepare_returns_a_new_instance()
{
var objectQueryExecutionPlanFactory = new ObjectQueryExecutionPlanFactory(
Common.Internal.Materialization.MockHelper.CreateTranslator<object>());
var metadataWorkspace = new MetadataWorkspace();
var edmItemCollection = new EdmItemCollection();
metadataWorkspace.RegisterItemCollection(edmItemCollection);
metadataWorkspace.RegisterItemCollection(new ObjectItemCollection());
var fakeSqlProviderManifest = new FakeSqlProviderServices().GetProviderManifest("2008");
var storeItemCollection = new StoreItemCollection(FakeSqlProviderFactory.Instance, fakeSqlProviderManifest, "2008");
metadataWorkspace.RegisterItemCollection(storeItemCollection);
metadataWorkspace.RegisterItemCollection(new StorageMappingItemCollection(edmItemCollection, storeItemCollection, Enumerable.Empty<XmlReader>()));
var fakeSqlConnection = new FakeSqlConnection();
fakeSqlConnection.ConnectionString = "foo";
var entityConnection = new EntityConnection(metadataWorkspace, fakeSqlConnection, false);
var objectContext = new ObjectContext(entityConnection);
var dbExpression = new DbNullExpression(TypeUsage.Create(fakeSqlProviderManifest.GetStoreTypes().First()));
var dbQueryCommandTree = new DbQueryCommandTree(metadataWorkspace, DataSpace.CSpace,
dbExpression, validate: false);
var parameters = new List<Tuple<ObjectParameter, QueryParameterExpression>>();
var objectQueryExecutionPlan = objectQueryExecutionPlanFactory.Prepare(objectContext, dbQueryCommandTree, typeof(object),
MergeOption.NoTracking, new Span(), parameters, aliasGenerator: null);
Assert.NotNull(objectQueryExecutionPlan);
}
/// <summary>
/// Creates generated view object for the combination of the <paramref name="extent" /> and the <paramref name="type" />.
/// This constructor is used for regular cell-based view generation.
/// </summary>
internal static GeneratedView CreateGeneratedView(
EntitySetBase extent,
EdmType type,
DbQueryCommandTree commandTree,
string eSQL,
StorageMappingItemCollection mappingItemCollection,
ConfigViewGenerator config)
{
// If config.GenerateEsql is specified, eSQL must be non-null.
// If config.GenerateEsql is false, commandTree is non-null except the case when loading pre-compiled eSQL views.
Debug.Assert(!config.GenerateEsql || !String.IsNullOrEmpty(eSQL), "eSQL must be specified");
DiscriminatorMap discriminatorMap = null;
if (commandTree != null)
{
commandTree = ViewSimplifier.SimplifyView(extent, commandTree);
// See if the view matches the "discriminated" pattern (allows simplification of generated store commands)
if (extent.BuiltInTypeKind
== BuiltInTypeKind.EntitySet)
{
if (DiscriminatorMap.TryCreateDiscriminatorMap((EntitySet)extent, commandTree.Query, out discriminatorMap))
{
Debug.Assert(discriminatorMap != null, "discriminatorMap == null after it has been created");
}
}
}
return new GeneratedView(extent, type, commandTree, eSQL, discriminatorMap, mappingItemCollection, config);
}
private void GetAffectedEntitySets(System.Data.Entity.Core.Common.CommandTrees.DbCommandTree commandTree)
{
System.Data.Entity.Core.Common.CommandTrees.DbExpressionVisitor visitor = new FindAffectedEntitySetsVisitor(this.affectedEntitySets, this.functionsUsed);
System.Data.Entity.Core.Common.CommandTrees.DbQueryCommandTree queryTree = commandTree as System.Data.Entity.Core.Common.CommandTrees.DbQueryCommandTree;
if (queryTree != null)
{
queryTree.Query.Accept(visitor);
return;
}
System.Data.Entity.Core.Common.CommandTrees.DbFunctionCommandTree fxnTree = commandTree as System.Data.Entity.Core.Common.CommandTrees.DbFunctionCommandTree;
if (fxnTree != null)
{
this.IsStoredProcedure = true;
return;
}
System.Data.Entity.Core.Common.CommandTrees.DbUpdateCommandTree updateTree = commandTree as System.Data.Entity.Core.Common.CommandTrees.DbUpdateCommandTree;
if (updateTree != null)
{
this.IsModification = true;
updateTree.Target.Expression.Accept(visitor);
updateTree.Predicate.Accept(visitor);
if (updateTree.Returning != null)
{
updateTree.Returning.Accept(visitor);
}
return;
}
System.Data.Entity.Core.Common.CommandTrees.DbInsertCommandTree insertTree = commandTree as System.Data.Entity.Core.Common.CommandTrees.DbInsertCommandTree;
if (insertTree != null)
{
this.IsModification = true;
insertTree.Target.Expression.Accept(visitor);
if (insertTree.Returning != null)
{
insertTree.Returning.Accept(visitor);
}
return;
}
System.Data.Entity.Core.Common.CommandTrees.DbDeleteCommandTree deleteTree = commandTree as System.Data.Entity.Core.Common.CommandTrees.DbDeleteCommandTree;
if (deleteTree != null)
{
this.IsModification = true;
deleteTree.Target.Expression.Accept(visitor);
if (deleteTree.Predicate != null)
{
deleteTree.Predicate.Accept(visitor);
}
return;
}
throw new NotSupportedException("Command tree type " + commandTree.GetType() + " is not supported.");
}
/// <summary>
/// Creates generated view object for the combination of the <paramref name="extent" /> and the <paramref name="type" />.
/// This constructor is used for FK association sets only.
/// </summary>
internal static GeneratedView CreateGeneratedViewForFKAssociationSet(
EntitySetBase extent,
EdmType type,
DbQueryCommandTree commandTree,
StorageMappingItemCollection mappingItemCollection,
ConfigViewGenerator config)
{
return new GeneratedView(extent, type, commandTree, null, null, mappingItemCollection, config);
}
public virtual ObjectQueryExecutionPlan Prepare(
ObjectContext context, DbQueryCommandTree tree, Type elementType, MergeOption mergeOption, bool streaming, Span span,
IEnumerable<Tuple<ObjectParameter, QueryParameterExpression>> compiledQueryParameters, AliasGenerator aliasGenerator)
{
var treeResultType = tree.Query.ResultType;
// Rewrite this tree for Span?
DbExpression spannedQuery;
SpanIndex spanInfo;
if (ObjectSpanRewriter.TryRewrite(tree, span, mergeOption, aliasGenerator, out spannedQuery, out spanInfo))
{
tree = DbQueryCommandTree.FromValidExpression(
tree.MetadataWorkspace, tree.DataSpace, spannedQuery, tree.UseDatabaseNullSemantics);
}
else
{
spanInfo = null;
}
var entityDefinition = CreateCommandDefinition(context, tree);
var shaperFactory = Translator.TranslateColumnMap(
_translator, elementType, entityDefinition.CreateColumnMap(null),
context.MetadataWorkspace, spanInfo, mergeOption, streaming, false);
// attempt to determine entity information for this query (e.g. which entity type and which entity set)
EntitySet singleEntitySet = null;
// determine if the entity set is unambiguous given the entity type
if (treeResultType.EdmType.BuiltInTypeKind == BuiltInTypeKind.CollectionType
&& entityDefinition.EntitySets != null)
{
foreach (var entitySet in entityDefinition.EntitySets)
{
if (entitySet != null
&& entitySet.ElementType.IsAssignableFrom(((CollectionType)treeResultType.EdmType).TypeUsage.EdmType))
{
if (singleEntitySet == null)
{
// found a single match
singleEntitySet = entitySet;
}
else
{
// there's more than one matching entity set
singleEntitySet = null;
break;
}
}
}
}
return new ObjectQueryExecutionPlan(
entityDefinition, shaperFactory, treeResultType, mergeOption, streaming, singleEntitySet, compiledQueryParameters);
}
/// <summary>
/// This method is called after a new DbCommandTree has been created.
/// It collects only DbQueryCommandTrees.
/// </summary>
/// <param name="interceptionContext">Represents contextual information associated with calls into IDbCommandTreeInterceptor implementations.</param>
public void TreeCreated(DbCommandTreeInterceptionContext interceptionContext)
{
if (interceptionContext.Result.CommandTreeKind == DbCommandTreeKind.Query
&& interceptionContext.Result.DataSpace == DataSpace.SSpace)
{
if (interceptionContext.ObjectContexts.Contains(_objectContext, ReferenceEquals))
{
DbQueryCommandTree = (DbQueryCommandTree)interceptionContext.Result;
}
}
}
/// <summary>
/// The only entry point.
/// Rewrites the given tree by replacing expressions that are not directly supported on SQL Server 2000
/// with alterntive translations.
/// </summary>
/// <param name="originalTree">The tree to rewrite</param>
/// <returns>The new tree</returns>
internal static DbQueryCommandTree Rewrite(DbQueryCommandTree originalTree)
{
Debug.Assert(originalTree != null, "OriginalTree is null");
var rewriter = new Sql8ExpressionRewriter(originalTree.MetadataWorkspace);
var newQuery = rewriter.VisitExpression(originalTree.Query);
#if DEBUG
return new DbQueryCommandTree(originalTree.MetadataWorkspace, originalTree.DataSpace, newQuery);
#else
return new DbQueryCommandTree(originalTree.MetadataWorkspace, originalTree.DataSpace, newQuery, validate: false);
#endif
}
private static EntityCommandDefinition CreateCommandDefinition(ObjectContext context, DbQueryCommandTree tree)
{
var connection = context.Connection;
// The connection is required to get to the CommandDefinition builder.
if (connection == null)
{
throw new InvalidOperationException(Strings.ObjectQuery_InvalidConnection);
}
var services = DbProviderServices.GetProviderServices(connection);
DbCommandDefinition definition;
try
{
definition = services.CreateCommandDefinition(tree, context.InterceptionContext);
}
catch (EntityCommandCompilationException)
{
// If we're running against EntityCommand, we probably already caught the providers'
// exception and wrapped it, we don't want to do that again, so we'll just rethrow
// here instead.
throw;
}
catch (Exception e)
{
// we should not be wrapping all exceptions
if (e.IsCatchableExceptionType())
{
// we don't wan't folks to have to know all the various types of exceptions that can
// occur, so we just rethrow a CommandDefinitionException and make whatever we caught
// the inner exception of it.
throw new EntityCommandCompilationException(Strings.EntityClient_CommandDefinitionPreparationFailed, e);
}
throw;
}
if (definition == null)
{
throw new NotSupportedException(Strings.ADP_ProviderDoesNotSupportCommandTrees);
}
return (EntityCommandDefinition)definition;
}
internal static bool TryRewrite(
DbQueryCommandTree tree, Span span, MergeOption mergeOption, AliasGenerator aliasGenerator, out DbExpression newQuery,
out SpanIndex spanInfo)
{
newQuery = null;
spanInfo = null;
ObjectSpanRewriter rewriter = null;
var requiresRelationshipSpan = Span.RequiresRelationshipSpan(mergeOption);
// Potentially perform a rewrite for span.
// Note that the public 'Span' property is NOT used to retrieve the Span instance
// since this forces creation of a Span object that may not be required.
if (span != null
&& span.SpanList.Count > 0)
{
rewriter = new ObjectFullSpanRewriter(tree, tree.Query, span, aliasGenerator);
}
else if (requiresRelationshipSpan)
{
rewriter = new ObjectSpanRewriter(tree, tree.Query, aliasGenerator);
}
if (rewriter != null)
{
rewriter.RelationshipSpan = requiresRelationshipSpan;
newQuery = rewriter.RewriteQuery();
if (newQuery != null)
{
Debug.Assert(
rewriter.SpanIndex != null || tree.Query.ResultType.EdmEquals(newQuery.ResultType),
"Query was rewritten for Span but no SpanIndex was created?");
spanInfo = rewriter.SpanIndex;
}
}
return (spanInfo != null);
}
protected virtual void VisitQueryCommandTree(DbQueryCommandTree queryTree)
{
Contract.Requires(queryTree != null);
VisitExpression(queryTree.Query);
}
/// <summary>
/// Sets the expected column types for a given query command tree
/// </summary>
private void SetQueryExpectedTypes(DbQueryCommandTree tree, EFMySqlCommand cmd)
{
DbProjectExpression projectExpression = tree.Query as DbProjectExpression;
if (projectExpression != null)
{
EdmType resultsType = projectExpression.Projection.ResultType.EdmType;
StructuralType resultsAsStructuralType = resultsType as StructuralType;
if (resultsAsStructuralType != null)
{
cmd.ColumnTypes = new PrimitiveType[resultsAsStructuralType.Members.Count];
for (int ordinal = 0; ordinal < resultsAsStructuralType.Members.Count; ordinal++)
{
EdmMember member = resultsAsStructuralType.Members[ordinal];
PrimitiveType primitiveType = member.TypeUsage.EdmType as PrimitiveType;
cmd.ColumnTypes[ordinal] = primitiveType;
}
}
}
}
/// <summary>
/// Given an extent and its corresponding view, invokes the parser to check if the view definition is syntactically correct.
/// Iff parsing succeeds: <paramref name="commandTree" /> and <paramref name="discriminatorMap" /> are set to the parse result and method returns true,
/// otherwise if parser has thrown a catchable exception, it is returned via <paramref name="parserException" /> parameter,
/// otherwise exception is re-thrown.
/// </summary>
private static bool TryParseView(
string eSQL,
bool isUserSpecified,
EntitySetBase extent,
StorageMappingItemCollection mappingItemCollection,
ConfigViewGenerator config,
out DbQueryCommandTree commandTree,
out DiscriminatorMap discriminatorMap,
out Exception parserException)
{
commandTree = null;
discriminatorMap = null;
parserException = null;
// We do not catch any internal exceptions any more
config.StartSingleWatch(PerfType.ViewParsing);
try
{
// If it is a user specified view, allow all queries. Otherwise parse the view in the restricted mode.
var compilationMode = ParserOptions.CompilationMode.RestrictedViewGenerationMode;
if (isUserSpecified)
{
compilationMode = ParserOptions.CompilationMode.UserViewGenerationMode;
}
Debug.Assert(!String.IsNullOrEmpty(eSQL), "eSQL query is not specified");
commandTree = (DbQueryCommandTree)ExternalCalls.CompileView(eSQL, mappingItemCollection, compilationMode);
// For non user-specified views, perform simplification.
if (!isUserSpecified)
{
commandTree = ViewSimplifier.SimplifyView(extent, commandTree);
}
// See if the view matches the "discriminated" pattern (allows simplification of generated store commands)
if (extent.BuiltInTypeKind
== BuiltInTypeKind.EntitySet)
{
if (DiscriminatorMap.TryCreateDiscriminatorMap((EntitySet)extent, commandTree.Query, out discriminatorMap))
{
Debug.Assert(discriminatorMap != null, "discriminatorMap == null after it has been created");
}
}
}
catch (Exception e)
{
// Catching all the exception types since Query parser seems to be throwing veriety of
// exceptions - EntityException, ArgumentException, ArgumentNullException etc.
if (e.IsCatchableExceptionType())
{
parserException = e;
}
else
{
throw;
}
}
finally
{
config.StopSingleWatch(PerfType.ViewParsing);
}
Debug.Assert(commandTree != null || parserException != null, "Either commandTree or parserException is expected.");
// Note: m_commandTree might have been initialized by a previous call to this method, so in consequent calls it might occur that
// both m_commandTree and parserException are not null - this would mean that the last parse attempt failed, but m_commandTree value is
// preserved from the previous call.
return parserException == null;
}
private GeneratedView(
EntitySetBase extent,
EdmType type,
DbQueryCommandTree commandTree,
string eSQL,
DiscriminatorMap discriminatorMap,
StorageMappingItemCollection mappingItemCollection,
ConfigViewGenerator config)
{
// At least one of the commandTree or eSQL must be specified.
// Both are specified in the case of user-defined views.
Debug.Assert(commandTree != null || !String.IsNullOrEmpty(eSQL), "commandTree or eSQL must be specified");
m_extent = extent;
m_type = type;
m_commandTree = commandTree;
m_eSQL = eSQL;
m_discriminatorMap = discriminatorMap;
m_mappingItemCollection = mappingItemCollection;
m_config = config;
if (m_config.IsViewTracing)
{
var trace = new StringBuilder(1024);
ToCompactString(trace);
Helpers.FormatTraceLine("CQL view for {0}", trace.ToString());
}
}
/// <summary>Implements the visitor pattern for the query command tree.</summary>
/// <param name="queryTree">The query command tree.</param>
protected virtual void VisitQueryCommandTree(DbQueryCommandTree queryTree)
{
Check.NotNull(queryTree, "queryTree");
VisitExpression(queryTree.Query);
}
// internal for testing
internal static string CreateDefiningQuery(EntitySet entitySet, MetadataWorkspace workspace, DbProviderServices providerServices)
{
Debug.Assert(entitySet != null, "entitySet != null");
Debug.Assert(workspace != null, "workspace != null");
Debug.Assert(providerServices != null, "providerServices != null");
var inputBinding = entitySet.Scan().BindAs(entitySet.Name);
var projectList = new List<KeyValuePair<string, DbExpression>>(entitySet.ElementType.Members.Count);
foreach (var member in entitySet.ElementType.Members)
{
Debug.Assert(member.BuiltInTypeKind == BuiltInTypeKind.EdmProperty, "Every member must be a edmproperty");
var propertyInfo = (EdmProperty)member;
projectList.Add(
new KeyValuePair<string, DbExpression>(
member.Name,
inputBinding.Variable.Property(propertyInfo)));
}
var query = inputBinding.Project(DbExpressionBuilder.NewRow(projectList));
var dbCommandTree = new DbQueryCommandTree(workspace, DataSpace.SSpace, query);
return providerServices.CreateCommandDefinition(dbCommandTree).CreateCommand().CommandText;
}
/// <summary>Implements the visitor pattern for the query command tree.</summary>
/// <param name="queryTree">The query command tree.</param>
protected virtual void VisitQueryCommandTree(DbQueryCommandTree queryTree)
{
Check.NotNull(queryTree, "queryTree");
VisitExpression(queryTree.Query);
}