// --------------------
// Internal Constructors
// --------------------
/// <summary>
/// The common constructor.
/// </summary>
/// <param name="queryState"> The underlying implementation of this ObjectQuery </param>
/// <returns> A new ObjectQuery instance. </returns>
internal ObjectQuery(ObjectQueryState queryState)
{
DebugCheck.NotNull(queryState);
// Set the query state.
_state = queryState;
}
// --------------------
// Internal Constructors
// --------------------
/// <summary>
/// The common constructor.
/// </summary>
/// <param name="queryState">
/// The underlying implementation of this ObjectQuery
/// </param>
/// <returns>
/// A new ObjectQuery instance.
/// </returns>
internal ObjectQuery(ObjectQueryState queryState)
{
Debug.Assert(queryState != null, "ObjectQuery state cannot be null");
// Set the query state.
_state = queryState;
}
// --------------------
// Internal Constructors
// --------------------
/// <summary>
/// The common constructor.
/// </summary>
/// <param name="queryState">
/// The underlying implementation of this ObjectQuery
/// </param>
/// <returns>
/// A new ObjectQuery instance.
/// </returns>
internal ObjectQuery(ObjectQueryState queryState)
{
Debug.Assert(queryState != null, "ObjectQuery state cannot be null");
// Set the query state.
this._state = queryState;
}
// --------------------
// Internal Constructors
// --------------------
// <summary>
// The common constructor.
// </summary>
// <param name="queryState"> The underlying implementation of this ObjectQuery </param>
// <returns> A new ObjectQuery instance. </returns>
internal ObjectQuery(ObjectQueryState queryState)
{
DebugCheck.NotNull(queryState);
// Set the query state.
_state = queryState;
}
internal override ObjectQueryState Include <TElementType>(
ObjectQuery <TElementType> sourceQuery,
string includePath)
{
ObjectQueryState other = (ObjectQueryState) new EntitySqlQueryState(this.ElementType, this._queryText, this._queryExpression, this._allowsLimit, this.ObjectContext, ObjectParameterCollection.DeepCopy(this.Parameters), Span.IncludeIn(this.Span, includePath), (ObjectQueryExecutionPlanFactory)null);
this.ApplySettingsTo(other);
return(other);
}
internal override ObjectQueryState Include <TElementType>(
ObjectQuery <TElementType> sourceQuery,
string includePath)
{
MethodInfo includeMethod = ELinqQueryState.GetIncludeMethod <TElementType>(sourceQuery);
ObjectQueryState other = (ObjectQueryState) new ELinqQueryState(this.ElementType, this.ObjectContext, (Expression)Expression.Call((Expression)Expression.Constant((object)sourceQuery), includeMethod, (Expression)Expression.Constant((object)includePath, typeof(string))), (ObjectQueryExecutionPlanFactory)null);
this.ApplySettingsTo(other);
return(other);
}
/// <summary>
/// Helper method to extract the Entity-SQL command text from an <see cref="ObjectQueryState"/> instance if that
/// instance models an Entity-SQL-backed ObjectQuery, or to throw an exception indicating that query builder methods
/// are not supported on this query.
/// </summary>
/// <param name="query">The instance from which the Entity-SQL command text should be retrieved</param>
/// <returns>The Entity-SQL command text, if the specified query state instance is based on Entity-SQL</returns>
/// <exception cref="NotSupportedException">
/// If the specified instance is not based on Entity-SQL command text, and so does not support Entity-SQL query builder methods
/// </exception>
private static string GetCommandText(ObjectQueryState query)
{
string commandText = null;
if (!query.TryGetCommandText(out commandText))
{
throw new NotSupportedException(Strings.ObjectQuery_QueryBuilder_NotSupportedLinqSource);
}
return commandText;
}
/// <summary>
/// Helper method to extract the Entity-SQL command text from an <see cref="ObjectQueryState"/> instance if that
/// instance models an Entity-SQL-backed ObjectQuery, or to throw an exception indicating that query builder methods
/// are not supported on this query.
/// </summary>
/// <param name="query">The instance from which the Entity-SQL command text should be retrieved</param>
/// <returns>The Entity-SQL command text, if the specified query state instance is based on Entity-SQL</returns>
/// <exception cref="NotSupportedException">
/// If the specified instance is not based on Entity-SQL command text, and so does not support Entity-SQL query builder methods
/// </exception>
private static string GetCommandText(ObjectQueryState query)
{
string commandText = null;
if(!query.TryGetCommandText(out commandText))
{
throw EntityUtil.NotSupported(System.Data.Entity.Strings.ObjectQuery_QueryBuilder_NotSupportedLinqSource);
}
return commandText;
}
internal override ObjectQueryExecutionPlan GetExecutionPlan(
MergeOption?forMergeOption)
{
MergeOption mergeOption = ObjectQueryState.EnsureMergeOption(forMergeOption, this.UserSpecifiedMergeOption);
ObjectQueryExecutionPlan queryExecutionPlan1 = this._cachedPlan;
if (queryExecutionPlan1 != null)
{
if (queryExecutionPlan1.MergeOption == mergeOption && queryExecutionPlan1.Streaming == this.EffectiveStreamingBehavior)
{
return(queryExecutionPlan1);
}
queryExecutionPlan1 = (ObjectQueryExecutionPlan)null;
}
QueryCacheManager queryCacheManager = (QueryCacheManager)null;
EntitySqlQueryCacheKey key = (EntitySqlQueryCacheKey)null;
if (this.PlanCachingEnabled)
{
key = new EntitySqlQueryCacheKey(this.ObjectContext.DefaultContainerName, this._queryText, this.Parameters == null ? 0 : this.Parameters.Count, this.Parameters == null ? (string)null : this.Parameters.GetCacheKey(), this.Span == null ? (string)null : this.Span.GetCacheKey(), mergeOption, this.EffectiveStreamingBehavior, this.ElementType);
queryCacheManager = this.ObjectContext.MetadataWorkspace.GetQueryCacheManager();
ObjectQueryExecutionPlan queryExecutionPlan2 = (ObjectQueryExecutionPlan)null;
if (queryCacheManager.TryCacheLookup <EntitySqlQueryCacheKey, ObjectQueryExecutionPlan>(key, out queryExecutionPlan2))
{
queryExecutionPlan1 = queryExecutionPlan2;
}
}
if (queryExecutionPlan1 == null)
{
queryExecutionPlan1 = this._objectQueryExecutionPlanFactory.Prepare(this.ObjectContext, DbQueryCommandTree.FromValidExpression(this.ObjectContext.MetadataWorkspace, DataSpace.CSpace, this.Parse(), true), this.ElementType, mergeOption, this.EffectiveStreamingBehavior, this.Span, (IEnumerable <Tuple <ObjectParameter, QueryParameterExpression> >)null, DbExpressionBuilder.AliasGenerator);
if (key != null)
{
QueryCacheEntry inQueryCacheEntry = new QueryCacheEntry((QueryCacheKey)key, (object)queryExecutionPlan1);
QueryCacheEntry outQueryCacheEntry = (QueryCacheEntry)null;
if (queryCacheManager.TryLookupAndAdd(inQueryCacheEntry, out outQueryCacheEntry))
{
queryExecutionPlan1 = (ObjectQueryExecutionPlan)outQueryCacheEntry.GetTarget();
}
}
}
if (this.Parameters != null)
{
this.Parameters.SetReadOnly(true);
}
this._cachedPlan = queryExecutionPlan1;
return(queryExecutionPlan1);
}
internal static ObjectQueryState Where(ObjectQueryState query, string alias, string predicate, ObjectParameter[] parameters)
{
return BuildOrderByOrWhere(query, alias, predicate, parameters, _whereOp, null, false);
}
internal static ObjectQueryState UnionAll(ObjectQueryState leftQuery, ObjectQueryState rightQuery)
{
// Ensure the Spans of the query arguments are merged into the new query's Span.
Span newSpan = Span.CopyUnion(leftQuery.Span, rightQuery.Span);
// Call the SetOp helper.
return BuildSetOp(leftQuery, rightQuery, newSpan, _unionAllOp);
}
internal static ObjectQueryState Top(ObjectQueryState query, string alias, string count, ObjectParameter[] parameters)
{
int queryLength = count.Length;
string queryText = GetCommandText(query);
bool limitAllowed = ((EntitySqlQueryState)query).AllowsLimitSubclause;
if (limitAllowed)
{
// Build the new query string:
// <this query> LIMIT <count>
queryLength += (queryText.Length +
_limitOp.Length
// + count.Length is added above
);
}
else
{
// Build the new query string:
// "SELECT VALUE TOP(<count>) <alias> FROM (<this query>) AS <alias>"
queryLength += (_topOp.Length +
// count.Length + is added above
_topInfix.Length +
alias.Length +
_fromOp.Length +
queryText.Length +
_asOp.Length +
alias.Length);
}
StringBuilder builder = new StringBuilder(queryLength);
if (limitAllowed)
{
builder.Append(queryText);
builder.Append(_limitOp);
builder.Append(count);
}
else
{
builder.Append(_topOp);
builder.Append(count);
builder.Append(_topInfix);
builder.Append(alias);
builder.Append(_fromOp);
builder.Append(queryText);
builder.Append(_asOp);
builder.Append(alias);
}
// Create a new EntitySqlQueryImplementation that uses the new query as its command text.
// Span is carried over, no adjustment is needed.
return NewBuilderQuery(query, query.ElementType, builder, query.Span, MergeParameters(query.ObjectContext, query.Parameters, parameters));
}
internal static ObjectQueryState Skip(ObjectQueryState query, string alias, string keys, string count, ObjectParameter[] parameters)
{
Debug.Assert(!StringUtil.IsNullOrEmptyOrWhiteSpace(count), "Invalid skip count");
return BuildOrderByOrWhere(query, alias, keys, parameters, _orderByOp, count, true);
}
internal static ObjectQueryState SelectValue(ObjectQueryState query, string alias, string projection, ObjectParameter[] parameters, Type projectedType)
{
return BuildSelectOrSelectValue(query, alias, projection, parameters, _selectValueOp, projectedType);
}
internal static ObjectQueryState Select(ObjectQueryState query, string alias, string projection, ObjectParameter[] parameters)
{
return BuildSelectOrSelectValue(query, alias, projection, parameters, _selectOp, typeof(DbDataRecord));
}
private static ObjectQueryState NewBuilderQuery(ObjectQueryState sourceQuery, Type elementType, StringBuilder queryText, Span newSpan, IEnumerable<ObjectParameter> enumerableParams)
{
return NewBuilderQuery(sourceQuery, elementType, queryText, false, newSpan, enumerableParams);
}
internal ObjectQuery(ObjectQueryState queryState)
: base(queryState)
{
}
internal static ObjectQueryState Except(ObjectQueryState leftQuery, ObjectQueryState rightQuery)
{
// Call the SetOp helper.
// Span is taken from the leftmost query.
return EntitySqlQueryBuilder.BuildSetOp(leftQuery, rightQuery, leftQuery.Span, _exceptOp);
}
internal override ObjectQueryExecutionPlan GetExecutionPlan(
MergeOption?forMergeOption)
{
ObjectQueryExecutionPlan queryExecutionPlan1 = this._cachedPlan;
if (queryExecutionPlan1 != null)
{
MergeOption?mergeOption = ObjectQueryState.GetMergeOption(forMergeOption, this.UserSpecifiedMergeOption);
if (mergeOption.HasValue && mergeOption.Value != queryExecutionPlan1.MergeOption || (this._recompileRequired() || this.ObjectContext.ContextOptions.UseCSharpNullComparisonBehavior != this._useCSharpNullComparisonBehavior))
{
queryExecutionPlan1 = (ObjectQueryExecutionPlan)null;
}
}
if (queryExecutionPlan1 == null)
{
this._recompileRequired = (Func <bool>)null;
this.ResetParameters();
ExpressionConverter expressionConverter = this.CreateExpressionConverter();
DbExpression dbExpression = expressionConverter.Convert();
this._recompileRequired = expressionConverter.RecompileRequired;
MergeOption mergeOption = ObjectQueryState.EnsureMergeOption(forMergeOption, this.UserSpecifiedMergeOption, expressionConverter.PropagatedMergeOption);
this._useCSharpNullComparisonBehavior = this.ObjectContext.ContextOptions.UseCSharpNullComparisonBehavior;
this._linqParameters = expressionConverter.GetParameters();
if (this._linqParameters != null && this._linqParameters.Any <Tuple <ObjectParameter, QueryParameterExpression> >())
{
ObjectParameterCollection parameterCollection = this.EnsureParameters();
parameterCollection.SetReadOnly(false);
foreach (Tuple <ObjectParameter, QueryParameterExpression> linqParameter in this._linqParameters)
{
ObjectParameter objectParameter = linqParameter.Item1;
parameterCollection.Add(objectParameter);
}
parameterCollection.SetReadOnly(true);
}
QueryCacheManager queryCacheManager = (QueryCacheManager)null;
LinqQueryCacheKey key1 = (LinqQueryCacheKey)null;
string key2;
if (this.PlanCachingEnabled && !this._recompileRequired() && ExpressionKeyGen.TryGenerateKey(dbExpression, out key2))
{
key1 = new LinqQueryCacheKey(key2, this.Parameters == null ? 0 : this.Parameters.Count, this.Parameters == null ? (string)null : this.Parameters.GetCacheKey(), expressionConverter.PropagatedSpan == null ? (string)null : expressionConverter.PropagatedSpan.GetCacheKey(), mergeOption, this.EffectiveStreamingBehavior, this._useCSharpNullComparisonBehavior, this.ElementType);
queryCacheManager = this.ObjectContext.MetadataWorkspace.GetQueryCacheManager();
ObjectQueryExecutionPlan queryExecutionPlan2 = (ObjectQueryExecutionPlan)null;
if (queryCacheManager.TryCacheLookup <LinqQueryCacheKey, ObjectQueryExecutionPlan>(key1, out queryExecutionPlan2))
{
queryExecutionPlan1 = queryExecutionPlan2;
}
}
if (queryExecutionPlan1 == null)
{
queryExecutionPlan1 = this._objectQueryExecutionPlanFactory.Prepare(this.ObjectContext, DbQueryCommandTree.FromValidExpression(this.ObjectContext.MetadataWorkspace, DataSpace.CSpace, dbExpression, !this._useCSharpNullComparisonBehavior), this.ElementType, mergeOption, this.EffectiveStreamingBehavior, expressionConverter.PropagatedSpan, (IEnumerable <Tuple <ObjectParameter, QueryParameterExpression> >)null, expressionConverter.AliasGenerator);
if (key1 != null)
{
QueryCacheEntry inQueryCacheEntry = new QueryCacheEntry((QueryCacheKey)key1, (object)queryExecutionPlan1);
QueryCacheEntry outQueryCacheEntry = (QueryCacheEntry)null;
if (queryCacheManager.TryLookupAndAdd(inQueryCacheEntry, out outQueryCacheEntry))
{
queryExecutionPlan1 = (ObjectQueryExecutionPlan)outQueryCacheEntry.GetTarget();
}
}
}
this._cachedPlan = queryExecutionPlan1;
}
if (this._linqParameters != null)
{
foreach (Tuple <ObjectParameter, QueryParameterExpression> linqParameter in this._linqParameters)
{
ObjectParameter objectParameter = linqParameter.Item1;
QueryParameterExpression parameterExpression = linqParameter.Item2;
if (parameterExpression != null)
{
objectParameter.Value = parameterExpression.EvaluateParameter((object[])null);
}
}
}
return(queryExecutionPlan1);
}
internal static ObjectQueryState Distinct(ObjectQueryState query)
{
// Build the new query string - "SET(<this query>)"
string queryText = GetCommandText(query);
StringBuilder builder = new StringBuilder(_distinctProlog.Length + queryText.Length + _distinctEpilog.Length);
builder.Append(_distinctProlog);
builder.Append(queryText);
builder.Append(_distinctEpilog);
// Span is carried over, no adjustment is needed
return NewBuilderQuery(query, query.ElementType, builder, query.Span, ObjectParameterCollection.DeepCopy(query.Parameters));
}
private static ObjectQueryState BuildOrderByOrWhere(ObjectQueryState query, string alias, string predicateOrKeys, ObjectParameter[] parameters, string op, string skipCount, bool allowsLimit)
{
Debug.Assert(!StringUtil.IsNullOrEmptyOrWhiteSpace(alias), "Invalid alias");
Debug.Assert(!StringUtil.IsNullOrEmptyOrWhiteSpace(predicateOrKeys), "Invalid predicate/keys");
Debug.Assert(null == skipCount || op == _orderByOp, "Skip clause used with WHERE operator?");
string queryText = GetCommandText(query);
// Build the new query string:
// Either: "SELECT VALUE <alias> FROM (<this query>) AS <alias> WHERE <predicate>"
// (for Where)
// Or: "SELECT VALUE <alias> FROM (<this query>) AS <alias> ORDER BY <keys> <optional: SKIP <skip>>"
// Depending on the value of 'op'
int queryLength = _selectValueOp.Length +
alias.Length +
_fromOp.Length +
queryText.Length +
_asOp.Length +
alias.Length +
op.Length +
predicateOrKeys.Length;
if (skipCount != null)
{
queryLength += (_skipOp.Length + skipCount.Length);
}
StringBuilder builder = new StringBuilder(queryLength);
builder.Append(_selectValueOp);
builder.Append(alias);
builder.Append(_fromOp);
builder.Append(queryText);
builder.Append(_asOp);
builder.Append(alias);
builder.Append(op);
builder.Append(predicateOrKeys);
if (skipCount != null)
{
builder.Append(_skipOp);
builder.Append(skipCount);
}
// Create a new EntitySqlQueryImplementation that uses the new query as its command text.
// Span is carried over, no adjustment is needed.
return NewBuilderQuery(query, query.ElementType, builder, allowsLimit, query.Span, MergeParameters(query.ObjectContext, query.Parameters, parameters));
}
private static ObjectQueryState BuildSelectOrSelectValue(ObjectQueryState query, string alias, string projection, ObjectParameter[] parameters, string projectOp, Type elementType)
{
Debug.Assert(!StringUtil.IsNullOrEmptyOrWhiteSpace(alias), "Invalid alias");
Debug.Assert(!StringUtil.IsNullOrEmptyOrWhiteSpace(projection), "Invalid projection");
string queryText = GetCommandText(query);
// Build the new query string - "<project op> <projection> FROM (<this query>) AS <alias>"
int queryLength = projectOp.Length +
projection.Length +
_fromOp.Length +
queryText.Length +
_asOp.Length +
alias.Length;
StringBuilder builder = new StringBuilder(queryLength);
builder.Append(projectOp);
builder.Append(projection);
builder.Append(_fromOp);
builder.Append(queryText);
builder.Append(_asOp);
builder.Append(alias);
// Create a new EntitySqlQueryImplementation that uses the new query as its command text.
// Span should not be carried over from a Select or SelectValue operation.
return NewBuilderQuery(query, elementType, builder, null, MergeParameters(query.ObjectContext, query.Parameters, parameters));
}
// SetOp helper - note that this doesn't merge Spans, since Except uses the original query's Span
// while Intersect/Union/UnionAll use the merged Span.
private static ObjectQueryState BuildSetOp(ObjectQueryState leftQuery, ObjectQueryState rightQuery, Span newSpan, string setOp)
{
// Assert that the arguments aren't null (should have been verified by ObjectQuery)
Debug.Assert(leftQuery != null, "Left query is null?");
Debug.Assert(rightQuery != null, "Right query is null?");
Debug.Assert(leftQuery.ElementType.Equals(rightQuery.ElementType), "Incompatible element types in arguments to Except<T>/Intersect<T>/Union<T>/UnionAll<T>?");
// Retrieve the left and right arguments to the set operation -
// this will throw if either input query is not an Entity-SQL query.
string left = GetCommandText(leftQuery);
string right = GetCommandText(rightQuery);
// ObjectQuery arguments must be associated with the same ObjectContext instance as the implemented query
if (!object.ReferenceEquals(leftQuery.ObjectContext, rightQuery.ObjectContext))
{
throw EntityUtil.Argument(System.Data.Entity.Strings.ObjectQuery_QueryBuilder_InvalidQueryArgument, "query");
}
// Create a string builder only large enough to contain the new query text
int queryLength = _setOpProlog.Length + left.Length + setOp.Length + right.Length + _setOpEpilog.Length;
StringBuilder builder = new StringBuilder(queryLength);
// Build the new query
builder.Append(_setOpProlog);
builder.Append(left);
builder.Append(setOp);
builder.Append(right);
builder.Append(_setOpEpilog);
// Create a new query implementation and apply the state of this implementation to it.
// The Span of the query argument will be merged into the new query's Span by the caller, iff the Set Op is NOT Except.
// See the Except, Intersect, Union and UnionAll methods in this class for examples.
return NewBuilderQuery(leftQuery, leftQuery.ElementType, builder, newSpan, MergeParameters(leftQuery.Parameters, rightQuery.Parameters));
}
private static ObjectQueryState NewBuilderQuery(ObjectQueryState sourceQuery, Type elementType, StringBuilder queryText, bool allowsLimit, Span newSpan, IEnumerable<ObjectParameter> enumerableParams)
{
ObjectParameterCollection queryParams = enumerableParams as ObjectParameterCollection;
if (queryParams == null && enumerableParams != null)
{
queryParams = new ObjectParameterCollection(sourceQuery.ObjectContext.Perspective);
foreach (ObjectParameter objectParam in enumerableParams)
{
queryParams.Add(objectParam);
}
}
EntitySqlQueryState newState = new EntitySqlQueryState(elementType, queryText.ToString(), allowsLimit, sourceQuery.ObjectContext, queryParams, newSpan);
sourceQuery.ApplySettingsTo(newState);
return newState;
}
internal override ObjectQueryExecutionPlan GetExecutionPlan(
MergeOption?forMergeOption)
{
ObjectQueryExecutionPlan queryExecutionPlan = (ObjectQueryExecutionPlan)null;
CompiledQueryCacheEntry compiledQueryCacheEntry = this._cacheEntry;
bool comparisonBehavior = this.ObjectContext.ContextOptions.UseCSharpNullComparisonBehavior;
if (compiledQueryCacheEntry != null)
{
MergeOption mergeOption = ObjectQueryState.EnsureMergeOption(forMergeOption, this.UserSpecifiedMergeOption, compiledQueryCacheEntry.PropagatedMergeOption);
queryExecutionPlan = compiledQueryCacheEntry.GetExecutionPlan(mergeOption, comparisonBehavior);
if (queryExecutionPlan == null)
{
ExpressionConverter expressionConverter = this.CreateExpressionConverter();
DbExpression query = expressionConverter.Convert();
IEnumerable <Tuple <ObjectParameter, QueryParameterExpression> > parameters = expressionConverter.GetParameters();
ObjectQueryExecutionPlan newPlan = this._objectQueryExecutionPlanFactory.Prepare(this.ObjectContext, DbQueryCommandTree.FromValidExpression(this.ObjectContext.MetadataWorkspace, DataSpace.CSpace, query, !comparisonBehavior), this.ElementType, mergeOption, this.EffectiveStreamingBehavior, expressionConverter.PropagatedSpan, parameters, expressionConverter.AliasGenerator);
queryExecutionPlan = compiledQueryCacheEntry.SetExecutionPlan(newPlan, comparisonBehavior);
}
}
else
{
QueryCacheManager queryCacheManager = this.ObjectContext.MetadataWorkspace.GetQueryCacheManager();
CompiledQueryCacheKey key = new CompiledQueryCacheKey(this._cacheToken);
if (queryCacheManager.TryCacheLookup <CompiledQueryCacheKey, CompiledQueryCacheEntry>(key, out compiledQueryCacheEntry))
{
this._cacheEntry = compiledQueryCacheEntry;
MergeOption mergeOption = ObjectQueryState.EnsureMergeOption(forMergeOption, this.UserSpecifiedMergeOption, compiledQueryCacheEntry.PropagatedMergeOption);
queryExecutionPlan = compiledQueryCacheEntry.GetExecutionPlan(mergeOption, comparisonBehavior);
}
if (queryExecutionPlan == null)
{
ExpressionConverter expressionConverter = this.CreateExpressionConverter();
DbExpression query = expressionConverter.Convert();
IEnumerable <Tuple <ObjectParameter, QueryParameterExpression> > parameters = expressionConverter.GetParameters();
DbQueryCommandTree tree = DbQueryCommandTree.FromValidExpression(this.ObjectContext.MetadataWorkspace, DataSpace.CSpace, query, !comparisonBehavior);
if (compiledQueryCacheEntry == null)
{
compiledQueryCacheEntry = new CompiledQueryCacheEntry((QueryCacheKey)key, expressionConverter.PropagatedMergeOption);
QueryCacheEntry outQueryCacheEntry;
if (queryCacheManager.TryLookupAndAdd((QueryCacheEntry)compiledQueryCacheEntry, out outQueryCacheEntry))
{
compiledQueryCacheEntry = (CompiledQueryCacheEntry)outQueryCacheEntry;
}
this._cacheEntry = compiledQueryCacheEntry;
}
MergeOption mergeOption = ObjectQueryState.EnsureMergeOption(forMergeOption, this.UserSpecifiedMergeOption, compiledQueryCacheEntry.PropagatedMergeOption);
queryExecutionPlan = compiledQueryCacheEntry.GetExecutionPlan(mergeOption, comparisonBehavior);
if (queryExecutionPlan == null)
{
ObjectQueryExecutionPlan newPlan = this._objectQueryExecutionPlanFactory.Prepare(this.ObjectContext, tree, this.ElementType, mergeOption, this.EffectiveStreamingBehavior, expressionConverter.PropagatedSpan, parameters, expressionConverter.AliasGenerator);
queryExecutionPlan = compiledQueryCacheEntry.SetExecutionPlan(newPlan, comparisonBehavior);
}
}
}
ObjectParameterCollection parameterCollection = this.EnsureParameters();
if (queryExecutionPlan.CompiledQueryParameters != null && queryExecutionPlan.CompiledQueryParameters.Any <Tuple <ObjectParameter, QueryParameterExpression> >())
{
parameterCollection.SetReadOnly(false);
parameterCollection.Clear();
foreach (Tuple <ObjectParameter, QueryParameterExpression> compiledQueryParameter in queryExecutionPlan.CompiledQueryParameters)
{
ObjectParameter objectParameter = compiledQueryParameter.Item1.ShallowCopy();
QueryParameterExpression parameterExpression = compiledQueryParameter.Item2;
parameterCollection.Add(objectParameter);
if (parameterExpression != null)
{
objectParameter.Value = parameterExpression.EvaluateParameter(this._parameterValues);
}
}
}
parameterCollection.SetReadOnly(true);
return(queryExecutionPlan);
}
internal static ObjectQueryState OfType(ObjectQueryState query, EdmType newType, Type clrOfType)
{
Debug.Assert(newType != null, "OfType cannot be null");
Debug.Assert(Helper.IsEntityType(newType) || Helper.IsComplexType(newType), "OfType must be Entity or Complex type");
string queryText = GetCommandText(query);
// Build the new query string - "OFTYPE((<query>), [<type namespace>].[<type name>])"
int queryLength = _ofTypeProlog.Length +
queryText.Length +
_ofTypeInfix.Length +
newType.NamespaceName.Length +
(newType.NamespaceName != string.Empty ? _ofTypeInfix2.Length : 0) +
newType.Name.Length +
_ofTypeEpilog.Length;
StringBuilder builder = new StringBuilder(queryLength);
builder.Append(_ofTypeProlog);
builder.Append(queryText);
builder.Append(_ofTypeInfix);
if (newType.NamespaceName != string.Empty)
{
builder.Append(newType.NamespaceName);
builder.Append(_ofTypeInfix2);
}
builder.Append(newType.Name);
builder.Append(_ofTypeEpilog);
// Create a new EntitySqlQueryImplementation that uses the new query as its command text.
// Span is carried over, no adjustment is needed
return NewBuilderQuery(query, clrOfType, builder, query.Span, ObjectParameterCollection.DeepCopy(query.Parameters));
}
internal static ObjectQueryState OrderBy(ObjectQueryState query, string alias, string keys, ObjectParameter[] parameters)
{
return BuildOrderByOrWhere(query, alias, keys, parameters, _orderByOp, null, true);
}
internal ObjectQuery(ObjectQueryState queryState)
{
this._state = queryState;
}
internal static ObjectQueryState GroupBy(ObjectQueryState query, string alias, string keys, string projection, ObjectParameter[] parameters)
{
Debug.Assert(!StringUtil.IsNullOrEmptyOrWhiteSpace(alias), "Invalid alias");
Debug.Assert(!StringUtil.IsNullOrEmptyOrWhiteSpace(alias), "Invalid keys");
Debug.Assert(!StringUtil.IsNullOrEmptyOrWhiteSpace(projection), "Invalid projection");
string queryText = GetCommandText(query);
// Build the new query string:
// "SELECT <projection> FROM (<this query>) AS <alias> GROUP BY <keys>"
int queryLength = _selectOp.Length +
projection.Length +
_fromOp.Length +
queryText.Length +
_asOp.Length +
alias.Length +
_groupByOp.Length +
keys.Length;
StringBuilder builder = new StringBuilder(queryLength);
builder.Append(_selectOp);
builder.Append(projection);
builder.Append(_fromOp);
builder.Append(queryText);
builder.Append(_asOp);
builder.Append(alias);
builder.Append(_groupByOp);
builder.Append(keys);
// Create a new EntitySqlQueryImplementation that uses the new query as its command text.
// Span should not be carried over from a GroupBy operation.
return NewBuilderQuery(query, typeof(DbDataRecord), builder, null, MergeParameters(query.ObjectContext, query.Parameters, parameters));
}
internal static ObjectQueryState Skip(ObjectQueryState query, string alias, string keys, string count, ObjectParameter[] parameters)
{
DebugCheck.NotEmpty(count);
return BuildOrderByOrWhere(query, alias, keys, parameters, _orderByOp, count, true);
}
