/// <summary>
/// Creates entity from elements.
/// </summary>
/// <param name="fromClause"></param>
/// <param name="origin"></param>
/// <param name="path"></param>
public FromElementFactory(FromClause fromClause, FromElement origin, string path)
{
_fromClause = fromClause;
_origin = origin;
_path = path;
_collection = false;
}
/// <summary>
/// Constructor form used to initialize <see cref="ComponentJoin"/>.
/// </summary>
/// <param name="fromClause">The FROM clause to which this element belongs.</param>
/// <param name="origin">The origin (LHS) of this element.</param>
/// <param name="alias">The alias applied to this element.</param>
protected FromElement(FromClause fromClause,FromElement origin,string alias):this(origin._token)
{
_fromClause = fromClause;
_origin = origin;
_classAlias = alias;
_tableAlias = origin.TableAlias;
base.Initialize(fromClause.Walker);
}
public FromElementType(FromElement fromElement, IEntityPersister persister, EntityType entityType)
{
_fromElement = fromElement;
_persister = persister;
_entityType = entityType;
var queryable = persister as IQueryable;
if (queryable != null)
fromElement.Text = queryable.TableName + " " + fromElement.TableAlias;
}
public FromElementType(FromElement fromElement, IEntityPersister persister, EntityType entityType)
{
_fromElement = fromElement;
_persister = persister;
_entityType = entityType;
if (persister != null)
{
fromElement.Text = ((IQueryable)persister).TableName + " " + TableAlias;
}
}
public ComponentJoin(FromClause fromClause, FromElement origin, string alias, string componentPath, ComponentType componentType)
: base(fromClause, origin, alias)
{
this.componentPath = componentPath;
this.componentType = componentType;
componentProperty = StringHelper.Unqualify(componentPath);
fromClause.AddJoinByPathMap(componentPath, this);
InitializeComponentJoin(new ComponentFromElementType(this));
string[] cols = origin.GetPropertyMapping("").ToColumns(TableAlias, componentProperty);
columns = string.Join(", ", cols);
}
/// <summary>
/// Creates collection from elements.
/// </summary>
/// <param name="fromClause"></param>
/// <param name="origin"></param>
/// <param name="path"></param>
/// <param name="classAlias"></param>
/// <param name="columns"></param>
/// <param name="implied"></param>
public FromElementFactory(
FromClause fromClause,
FromElement origin,
string path,
string classAlias,
string[] columns,
bool implied)
: this(fromClause, origin, path)
{
_classAlias = classAlias;
_columns = columns;
_implied = implied;
_collection = true;
}
public void AddJoinByPathMap(string path, FromElement destination)
{
if (Log.IsDebugEnabled)
{
Log.Debug("addJoinByPathMap() : " + path + " -> " + destination);
}
_fromElementsByPath.Add(path, destination);
}
public void SetOrigin(FromElement origin, bool manyToMany)
{
_origin = origin;
origin.AddDestination(this);
if (origin.FromClause == FromClause)
{
// TODO: Figure out a better way to get the FROM elements in a proper tree structure.
// If this is not the destination of a many-to-many, add it as a child of the origin.
if (manyToMany)
{
origin.AddSibling(this);
}
else
{
if (!Walker.IsInFrom && !Walker.IsInSelect)
{
FromClause.AddChild(this);
}
else
{
origin.AddChild(this);
}
}
}
else if (!Walker.IsInFrom)
{
// HHH-276 : implied joins in a subselect where clause - The destination needs to be added
// to the destination's from clause.
FromClause.AddChild(this); // Not sure if this is will fix everything, but it works.
}
else
{
// Otherwise, the destination node was implied by the FROM clause and the FROM clause processor
// will automatically add it in the right place.
}
}
public void ResolveCollectionProperty(IASTNode expr)
{
String propertyName = CollectionProperties.GetNormalizedPropertyName( _methodName );
if ( expr is FromReferenceNode )
{
FromReferenceNode collectionNode = ( FromReferenceNode ) expr;
// If this is 'elements' then create a new FROM element.
if ( CollectionPropertyNames.Elements == propertyName )
{
HandleElements( collectionNode, propertyName );
}
else {
// Not elements(x)
_fromElement = collectionNode.FromElement;
DataType = _fromElement.GetPropertyType( propertyName, propertyName );
_selectColumns = _fromElement.ToColumns( _fromElement.TableAlias, propertyName, _inSelect );
}
if ( collectionNode is DotNode )
{
PrepareAnyImplicitJoins( ( DotNode ) collectionNode );
}
if ( !_inSelect )
{
_fromElement.Text = "";
_fromElement.UseWhereFragment = false;
}
PrepareSelectColumns( _selectColumns );
Text = _selectColumns[0];
Type = HqlSqlWalker.SQL_TOKEN;
}
else
{
throw new SemanticException(
"Unexpected expression " + expr +
" found for collection function " + propertyName
);
}
}
private static void RenderNonScalarProperties(ASTAppender appender, FromElement fromElement, int nonscalarSize, int k)
{
string text = fromElement.RenderPropertySelect(nonscalarSize, k);
appender.Append(HqlSqlWalker.SQL_TOKEN, text, false);
if (fromElement.QueryableCollection != null && fromElement.IsFetch)
{
text = fromElement.RenderCollectionSelectFragment(nonscalarSize, k);
appender.Append(HqlSqlWalker.SQL_TOKEN, text, false);
}
// Look through the FromElement's children to find any collections of values that should be fetched...
ASTIterator iter = new ASTIterator(fromElement);
foreach (FromElement child in iter)
{
if (child.IsCollectionOfValuesOrComponents && child.IsFetch)
{
// Need a better way to define the suffixes here...
text = child.RenderValueCollectionSelectFragment(nonscalarSize, nonscalarSize + k);
appender.Append(HqlSqlWalker.SQL_TOKEN, text, false);
}
}
}
IASTNode GenerateSyntheticDotNodeForNonQualifiedPropertyRef(IASTNode property, FromElement fromElement)
{
IASTNode dot = (IASTNode) adaptor.Create(DOT, "{non-qualified-property-ref}");
// TODO : better way?!?
((DotNode)dot).PropertyPath = ((FromReferenceNode)property).Path;
IdentNode syntheticAlias = (IdentNode)adaptor.Create(IDENT, "{synthetic-alias}");
syntheticAlias.FromElement = fromElement;
syntheticAlias.IsResolved = true;
dot.SetFirstChild(syntheticAlias);
dot.AddChild(property);
return dot;
}
public WithClauseVisitor(FromElement fromElement)
{
_joinFragment = fromElement;
}
public override object Create(IToken payload)
{
if (payload == null)
{
return base.Create(payload);
}
object ret;
switch (payload.Type)
{
case HqlSqlWalker.SELECT:
case HqlSqlWalker.QUERY:
ret = new QueryNode(payload);
break;
case HqlSqlWalker.UPDATE:
ret = new UpdateStatement(payload);
break;
case HqlSqlWalker.DELETE:
ret = new DeleteStatement(payload);
break;
case HqlSqlWalker.INSERT:
ret = new InsertStatement(payload);
break;
case HqlSqlWalker.INTO:
ret = new IntoClause(payload);
break;
case HqlSqlWalker.FROM:
ret = new FromClause(payload);
break;
case HqlSqlWalker.FROM_FRAGMENT:
ret = new FromElement(payload);
break;
case HqlSqlWalker.IMPLIED_FROM:
ret = new ImpliedFromElement(payload);
break;
case HqlSqlWalker.DOT:
ret = new DotNode(payload);
break;
case HqlSqlWalker.INDEX_OP:
ret = new IndexNode(payload);
break;
// Alias references and identifiers use the same node class.
case HqlSqlWalker.ALIAS_REF:
case HqlSqlWalker.IDENT:
ret = new IdentNode(payload);
break;
case HqlSqlWalker.SQL_TOKEN:
ret = new SqlFragment(payload);
break;
case HqlSqlWalker.METHOD_CALL:
ret = new MethodNode(payload);
break;
case HqlSqlWalker.ELEMENTS:
case HqlSqlWalker.INDICES:
ret = new CollectionFunction(payload);
break;
case HqlSqlWalker.SELECT_CLAUSE:
ret = new SelectClause(payload);
break;
case HqlSqlWalker.SELECT_EXPR:
ret = new SelectExpressionImpl(payload);
break;
case HqlSqlWalker.AGGREGATE:
ret = new AggregateNode(payload);
break;
case HqlSqlWalker.COUNT:
ret = new CountNode(payload);
break;
case HqlSqlWalker.CONSTRUCTOR:
ret = new ConstructorNode(payload);
break;
case HqlSqlWalker.NUM_INT:
case HqlSqlWalker.NUM_FLOAT:
case HqlSqlWalker.NUM_LONG:
case HqlSqlWalker.NUM_DOUBLE:
case HqlSqlWalker.NUM_DECIMAL:
case HqlSqlWalker.QUOTED_String:
ret = new LiteralNode(payload);
break;
case HqlSqlWalker.TRUE:
case HqlSqlWalker.FALSE:
ret = new BooleanLiteralNode(payload);
break;
case HqlSqlWalker.JAVA_CONSTANT:
ret = new JavaConstantNode(payload);
break;
case HqlSqlWalker.ORDER:
ret = new OrderByClause(payload);
break;
case HqlSqlWalker.PLUS:
case HqlSqlWalker.MINUS:
case HqlSqlWalker.STAR:
case HqlSqlWalker.DIV:
case HqlSqlWalker.BAND:
case HqlSqlWalker.BOR:
case HqlSqlWalker.BXOR:
ret = new BinaryArithmeticOperatorNode(payload);
break;
case HqlSqlWalker.UNARY_MINUS:
case HqlSqlWalker.UNARY_PLUS:
case HqlSqlWalker.BNOT:
ret = new UnaryArithmeticNode(payload);
break;
case HqlSqlWalker.CASE2:
ret = new Case2Node(payload);
break;
case HqlSqlWalker.CASE:
ret = new CaseNode(payload);
break;
case HqlSqlWalker.PARAM:
case HqlSqlWalker.NAMED_PARAM:
ret = new ParameterNode(payload);
break;
case HqlSqlWalker.EQ:
case HqlSqlWalker.NE:
case HqlSqlWalker.LT:
case HqlSqlWalker.GT:
case HqlSqlWalker.LE:
case HqlSqlWalker.GE:
case HqlSqlWalker.LIKE:
case HqlSqlWalker.NOT_LIKE:
ret = new BinaryLogicOperatorNode(payload);
break;
case HqlSqlWalker.IN:
case HqlSqlWalker.NOT_IN:
ret = new InLogicOperatorNode(payload);
break;
case HqlSqlWalker.BETWEEN:
case HqlSqlWalker.NOT_BETWEEN:
ret = new BetweenOperatorNode(payload);
break;
case HqlSqlWalker.IS_NULL:
ret = new IsNullLogicOperatorNode(payload);
break;
case HqlSqlWalker.IS_NOT_NULL:
ret = new IsNotNullLogicOperatorNode(payload);
break;
case HqlSqlWalker.EXISTS:
ret = new UnaryLogicOperatorNode(payload);
break;
default:
ret = new SqlNode(payload);
break;
}
Initialise(ret);
return ret;
}
protected FromElementType(FromElement fromElement)
{
_fromElement = fromElement;
}
private void DereferenceEntity(EntityType entityType, bool implicitJoin, string classAlias, bool generateJoin, IASTNode parent)
{
CheckForCorrelatedSubquery("dereferenceEntity");
// three general cases we check here as to whether to render a physical SQL join:
// 1) is our parent a DotNode as well? If so, our property reference is
// being further de-referenced...
// 2) is this a DML statement
// 3) we were asked to generate any needed joins (generateJoins==true) *OR*
// we are currently processing a select or from clause
// (an additional check is the REGRESSION_STYLE_JOIN_SUPPRESSION check solely intended for the test suite)
//
// The REGRESSION_STYLE_JOIN_SUPPRESSION is an additional check
// intended solely for use within the test suite. This forces the
// implicit join resolution to behave more like the classic parser.
// The underlying issue is that classic translator is simply wrong
// about its decisions on whether or not to render an implicit join
// into a physical SQL join in a lot of cases. The piece it generally
// tends to miss is that INNER joins effect the results by further
// restricting the data set! A particular manifestation of this is
// the fact that the classic translator will skip the physical join
// for ToOne implicit joins *if the query is shallow*; the result
// being that Query.list() and Query.iterate() could return
// different number of results!
DotNode parentAsDotNode = null;
string property = _propertyName;
bool joinIsNeeded;
//For nullable entity comparisons we always need to add join (like not constrained one-to-one or not-found ignore associations)
//NOTE: This fix is not fully correct. It doesn't work for comparisons with null (where e.OneToOneProp is null)
// as by default implicit join is generated and to work propelry left join is required (see GH-2611)
bool comparisonWithNullableEntity = false;
if (IsDotNode(parent))
{
// our parent is another dot node, meaning we are being further dereferenced.
// thus we need to generate a join unless the parent refers to the associated
// entity's PK (because 'our' table would know the FK).
parentAsDotNode = ( DotNode )parent;
property = parentAsDotNode._propertyName;
joinIsNeeded = generateJoin && ((Walker.IsSelectStatement && entityType.IsNullable) || !IsReferenceToPrimaryKey(parentAsDotNode._propertyName, entityType));
}
else if (!Walker.IsSelectStatement)
{
// in non-select queries, the only time we should need to join is if we are in a subquery from clause
joinIsNeeded = Walker.CurrentStatementType == HqlSqlWalker.SELECT && Walker.IsInFrom;
}
else if (REGRESSION_STYLE_JOIN_SUPPRESSION)
{
// this is the regression style determination which matches the logic of the classic translator
joinIsNeeded = generateJoin && (!Walker.IsInSelect || !Walker.IsShallowQuery);
}
else
{
comparisonWithNullableEntity = (Walker.IsComparativeExpressionClause && entityType.IsNullable);
joinIsNeeded = generateJoin || (Walker.IsInSelect && !Walker.IsInCase) || (Walker.IsInFrom && !Walker.IsComparativeExpressionClause) ||
comparisonWithNullableEntity;
}
if (joinIsNeeded)
{
DereferenceEntityJoin(classAlias, entityType, implicitJoin, parent);
if (comparisonWithNullableEntity)
{
_columns = FromElement.GetIdentityColumns();
}
}
else
{
DereferenceEntityIdentifier(property, parentAsDotNode);
}
}
private void InitializeAndAddFromElement(FromElement element,
string className,
string classAlias,
IEntityPersister entityPersister,
EntityType type,
string tableAlias)
{
if (tableAlias == null)
{
AliasGenerator aliasGenerator = _fromClause.AliasGenerator;
tableAlias = aliasGenerator.CreateName(entityPersister.EntityName);
}
element.InitializeEntity(_fromClause, className, entityPersister, type, classAlias, tableAlias);
}
private FromElement InitializeJoin(
string path,
FromElement destination,
JoinSequence joinSequence,
string[] columns,
FromElement origin,
bool manyToMany)
{
destination.Type = HqlSqlWalker.JOIN_FRAGMENT;
destination.JoinSequence = joinSequence;
destination.Columns = columns;
destination.SetOrigin(origin, manyToMany);
_fromClause.AddJoinByPathMap(path, destination);
return destination;
}
private void AddDestination(FromElement fromElement)
{
_destinations.Add(fromElement);
}
private FromElement CreateFromElementInSubselect(
string path,
string pathAlias,
FromElement parentFromElement,
string classAlias)
{
if (Log.IsDebugEnabled)
{
Log.Debug("createFromElementInSubselect() : path = " + path);
}
// Create an DotNode AST for the path and resolve it.
FromElement fromElement = EvaluateFromElementPath(path, classAlias);
IEntityPersister entityPersister = fromElement.EntityPersister;
// If the first identifier in the path referrs to the class alias (not the class name), then this
// is a correlated subselect. If it's a correlated sub-select, use the existing table alias. Otherwise
// generate a new one.
bool correlatedSubselect = pathAlias == parentFromElement.ClassAlias;
string tableAlias = correlatedSubselect ? fromElement.TableAlias : null;
// If the from element isn't in the same clause, create a new from element.
if (fromElement.FromClause != _fromClause)
{
if (Log.IsDebugEnabled)
{
Log.Debug("createFromElementInSubselect() : creating a new FROM element...");
}
fromElement = CreateFromElement(entityPersister);
InitializeAndAddFromElement(fromElement,
path,
classAlias,
entityPersister,
(EntityType)((IQueryable)entityPersister).Type,
tableAlias
);
}
if (Log.IsDebugEnabled)
{
Log.Debug("createFromElementInSubselect() : " + path + " -> " + fromElement);
}
return fromElement;
}
private static FromElement GetOrigin(FromElement fromElement)
{
var realOrigin = fromElement.RealOrigin;
if (realOrigin != null)
return realOrigin;
// work around that crazy issue where the tree contains
// "empty" FromElements (no text); afaict, this is caused
// by FromElementFactory.createCollectionJoin()
var origin = fromElement.Origin;
if (origin == null)
throw new QueryException("Unable to determine origin of join fetch [" + fromElement.GetDisplayText() + "]");
return origin;
}
private void SetImpliedJoin(FromElement elem)
{
_impliedJoin = elem;
if (GetFirstChild().Type == HqlSqlWalker.DOT)
{
DotNode dotLhs = (DotNode)GetFirstChild();
if (dotLhs.GetImpliedJoin() != null)
{
_impliedJoin = dotLhs.GetImpliedJoin();
}
}
}
internal JoinSequenceSelector(HqlSqlWalker walker, FromClause fromClause, FromElement fromElement)
{
_walker = walker;
_fromClause = fromClause;
_fromElement = fromElement;
}
public FromElement CreateCollection(IQueryableCollection queryableCollection,
string role,
JoinType joinType,
bool fetchFlag,
bool indexed)
{
if (!_collection)
{
throw new InvalidOperationException("FromElementFactory not initialized for collections!");
}
_inElementsFunction = indexed;
FromElement elem;
_queryableCollection = queryableCollection;
_collectionType = queryableCollection.CollectionType;
string roleAlias = _fromClause.AliasGenerator.CreateName(role);
// Correlated subqueries create 'special' implied from nodes
// because correlated subselects can't use an ANSI-style join
bool explicitSubqueryFromElement = _fromClause.IsSubQuery && !_implied;
if (explicitSubqueryFromElement)
{
string pathRoot = StringHelper.Root(_path);
FromElement origin = _fromClause.GetFromElement(pathRoot);
if (origin == null || origin.FromClause != _fromClause)
{
_implied = true;
}
}
// super-duper-classic-parser-regression-testing-mojo-magic...
if (explicitSubqueryFromElement && DotNode.UseThetaStyleImplicitJoins)
{
_implied = true;
}
IType elementType = queryableCollection.ElementType;
if (elementType.IsEntityType)
{
// A collection of entities...
elem = CreateEntityAssociation(role, roleAlias, joinType);
}
else if (elementType.IsComponentType)
{
// A collection of components...
JoinSequence joinSequence = CreateJoinSequence(roleAlias, joinType);
elem = CreateCollectionJoin(joinSequence, roleAlias);
}
else
{
// A collection of scalar elements...
JoinSequence joinSequence = CreateJoinSequence(roleAlias, joinType);
elem = CreateCollectionJoin(joinSequence, roleAlias);
}
elem.SetRole(role);
elem.QueryableCollection = queryableCollection;
// Don't include sub-classes for implied collection joins or subquery joins.
if (_implied)
{
elem.IncludeSubclasses = false;
}
if (explicitSubqueryFromElement)
{
elem.InProjectionList = true; // Treat explict from elements in sub-queries properly.
}
if (fetchFlag)
{
elem.Fetch = true;
}
return(elem);
}
private void HandleWithFragment(FromElement fromElement, IASTNode hqlWithNode)
{
try
{
ITreeNodeStream old = input;
input = new CommonTreeNodeStream(adaptor, hqlWithNode);
IASTNode hqlSqlWithNode = (IASTNode) withClause().Tree;
input = old;
if (log.IsDebugEnabled)
{
log.Debug("handleWithFragment() : " + _printer.ShowAsString(hqlSqlWithNode, "-- with clause --"));
}
WithClauseVisitor visitor = new WithClauseVisitor(fromElement);
NodeTraverser traverser = new NodeTraverser(visitor);
traverser.TraverseDepthFirst(hqlSqlWithNode);
FromElement referencedFromElement = visitor.GetReferencedFromElement();
if (referencedFromElement != fromElement)
{
throw new InvalidWithClauseException(
"with-clause expressions did not reference from-clause element to which the with-clause was associated");
}
SqlGenerator sql = new SqlGenerator(_sessionFactoryHelper.Factory, new CommonTreeNodeStream(adaptor, hqlSqlWithNode.GetChild(0)));
sql.whereExpr();
var withClauseFragment = new SqlString("(", sql.GetSQL(), ")");
fromElement.SetWithClauseFragment(visitor.GetJoinAlias(), withClauseFragment);
}
catch (SemanticException)
{
throw;
}
catch (InvalidWithClauseException)
{
throw;
}
catch (Exception e)
{
throw new SemanticException(e.Message);
}
}
private void DereferenceCollection(CollectionType collectionType, bool implicitJoin, bool indexed, string classAlias)
{
_dereferenceType = DerefCollection;
string role = collectionType.Role;
//foo.bars.size (also handles deprecated stuff like foo.bars.maxelement for backwardness)
IASTNode sibling = NextSibling;
bool isSizeProperty = sibling != null && CollectionProperties.IsAnyCollectionProperty(sibling.Text);
if (isSizeProperty)
{
indexed = true; //yuck!}
}
IQueryableCollection queryableCollection = SessionFactoryHelper.RequireQueryableCollection(role);
string propName = Path;
FromClause currentFromClause = Walker.CurrentFromClause;
if (Walker.StatementType != HqlSqlWalker.SELECT && indexed && classAlias == null)
{
// should indicate that we are processing an INSERT/UPDATE/DELETE
// query with a subquery implied via a collection property
// function. Here, we need to use the table name itself as the
// qualification alias.
// TODO : verify this works for all databases...
// TODO : is this also the case in non-"indexed" scenarios?
string alias = GetLhs().FromElement.Queryable.TableName;
_columns = FromElement.ToColumns(alias, _propertyPath, false, true);
}
//We do not look for an existing join on the same path, because
//it makes sense to join twice on the same collection role
var factory = new FromElementFactory(
currentFromClause,
GetLhs().FromElement,
propName,
classAlias,
GetColumns(),
implicitJoin
);
FromElement elem = factory.CreateCollection(queryableCollection, role, _joinType, _fetch, indexed);
if (Log.IsDebugEnabled)
{
Log.Debug("dereferenceCollection() : Created new FROM element for " + propName + " : " + elem);
}
SetImpliedJoin(elem);
FromElement = elem; // This 'dot' expression now refers to the resulting from element.
if (isSizeProperty)
{
elem.Text = "";
elem.UseWhereFragment = false;
}
if (!implicitJoin)
{
IEntityPersister entityPersister = elem.EntityPersister;
if (entityPersister != null)
{
Walker.AddQuerySpaces(entityPersister.QuerySpaces);
}
}
Walker.AddQuerySpaces(queryableCollection.CollectionSpaces); // Always add the collection's query spaces.
}
public void Visit(IASTNode node)
{
// todo : currently expects that the individual with expressions apply to the same sql table join.
// This may not be the case for joined-subclass where the property values
// might be coming from different tables in the joined hierarchy. At some
// point we should expand this to support that capability. However, that has
// some difficulties:
// 1) the biggest is how to handle ORs when the individual comparisons are
// linked to different sql joins.
// 2) here we would need to track each comparison individually, along with
// the join alias to which it applies and then pass that information
// back to the FromElement so it can pass it along to the JoinSequence
if ( node is DotNode )
{
DotNode dotNode = ( DotNode ) node;
FromElement fromElement = dotNode.FromElement;
if ( _referencedFromElement != null )
{
if ( fromElement != _referencedFromElement )
{
throw new HibernateException( "with-clause referenced two different from-clause elements" );
}
}
else
{
_referencedFromElement = fromElement;
_joinAlias = ExtractAppliedAlias( dotNode );
// todo : temporary
// needed because currently persister is the one that
// creates and renders the join fragments for inheritence
// hierarchies...
if ( _joinAlias != _referencedFromElement.TableAlias)
{
throw new InvalidWithClauseException( "with clause can only reference columns in the driving table" );
}
}
}
else if ( node is ParameterNode )
{
ApplyParameterSpecification(((ParameterNode) node).HqlParameterSpecification);
}
else if ( node is IParameterContainer )
{
ApplyParameterSpecifications( ( IParameterContainer ) node );
}
}
private void DereferenceEntityJoin(string classAlias, EntityType propertyType, bool impliedJoin, IASTNode parent)
{
_dereferenceType = DerefEntity;
if (Log.IsDebugEnabled)
{
Log.Debug("dereferenceEntityJoin() : generating join for " + _propertyName + " in "
+ FromElement.ClassName + " "
+ ((classAlias == null) ? "{no alias}" : "(" + classAlias + ")")
+ " parent = " + ASTUtil.GetDebugstring(parent)
);
}
// Create a new FROM node for the referenced class.
string associatedEntityName = propertyType.GetAssociatedEntityName();
string tableAlias = AliasGenerator.CreateName(associatedEntityName);
string[] joinColumns = GetColumns();
string joinPath = Path;
if (impliedJoin && Walker.IsInFrom)
{
_joinType = Walker.ImpliedJoinType;
}
FromClause currentFromClause = Walker.CurrentFromClause;
FromElement elem = currentFromClause.FindJoinByPath(joinPath);
///////////////////////////////////////////////////////////////////////////////
//
// This is the piece which recognizes the condition where an implicit join path
// resolved earlier in a correlated subquery is now being referenced in the
// outer query. For 3.0final, we just let this generate a second join (which
// is exactly how the old parser handles this). Eventually we need to add this
// logic back in and complete the logic in FromClause.promoteJoin; however,
// FromClause.promoteJoin has its own difficulties (see the comments in
// FromClause.promoteJoin).
//
// if ( elem == null ) {
// // see if this joinPath has been used in a "child" FromClause, and if so
// // promote that element to the outer query
// FromClause currentNodeOwner = getFromElement().getFromClause();
// FromClause currentJoinOwner = currentNodeOwner.locateChildFromClauseWithJoinByPath( joinPath );
// if ( currentJoinOwner != null && currentNodeOwner != currentJoinOwner ) {
// elem = currentJoinOwner.findJoinByPathLocal( joinPath );
// if ( elem != null ) {
// currentFromClause.promoteJoin( elem );
// // EARLY EXIT!!!
// return;
// }
// }
// }
//
///////////////////////////////////////////////////////////////////////////////
bool found = elem != null;
// even though we might find a pre-existing element by join path, for FromElements originating in a from-clause
// we should only ever use the found element if the aliases match (null != null here).
// Implied joins are ok to reuse only if in same from clause (are there any other cases when we should reject implied joins?).
bool useFoundFromElement = found &&
(elem.IsImplied && elem.FromClause == currentFromClause || // NH different behavior (NH-3002)
AreSame(classAlias, elem.ClassAlias));
if (!useFoundFromElement)
{
// If this is an implied join in a from element, then use the impled join type which is part of the
// tree parser's state (set by the gramamar actions).
JoinSequence joinSequence = SessionFactoryHelper
.CreateJoinSequence(impliedJoin, propertyType, tableAlias, _joinType, joinColumns);
var factory = new FromElementFactory(
currentFromClause,
GetLhs().FromElement,
joinPath,
classAlias,
joinColumns,
impliedJoin
);
elem = factory.CreateEntityJoin(
associatedEntityName,
tableAlias,
joinSequence,
_fetch,
Walker.IsInFrom,
propertyType
);
}
else
{
currentFromClause.AddDuplicateAlias(classAlias, elem);
}
SetImpliedJoin(elem);
Walker.AddQuerySpaces(elem.EntityPersister.QuerySpaces);
FromElement = elem; // This 'dot' expression now refers to the resulting from element.
}
private void RenderNonScalarIdentifiers(FromElement fromElement, int nonscalarSize, int j, ISelectExpression expr, ASTAppender appender)
{
string text = fromElement.RenderIdentifierSelect(nonscalarSize, j);
if (!fromElement.FromClause.IsSubQuery)
{
if (!_scalarSelect && !Walker.IsShallowQuery)
{
//TODO: is this a bit ugly?
expr.Text = text;
}
else
{
appender.Append(HqlSqlWalker.SQL_TOKEN, text, false);
}
}
}
public void AddDuplicateAlias(string alias, FromElement element)
{
if (alias != null)
{
_fromElementByClassAlias.Add(alias, element);
}
}
private void AddCollectionFromElement(FromElement fromElement)
{
if (fromElement.IsFetch)
{
if (fromElement.CollectionJoin || fromElement.QueryableCollection != null)
{
String suffix;
if (_collectionFromElements == null)
{
_collectionFromElements = new List<FromElement>();
suffix = VERSION2_SQL ? "__" : "0__";
}
else
{
suffix = _collectionFromElements.Count + "__";
}
_collectionFromElements.Add(fromElement);
fromElement.CollectionSuffix = suffix;
}
}
}
public override void SetScalarColumnText(int i)
{
Text = FromElement.RenderScalarIdentifierSelect(i);
}
public void AddWhereFragment(
JoinFragment joinFragment,
SqlString whereFragment,
QueryNode query,
FromElement fromElement,
HqlSqlWalker hqlSqlWalker)
{
if (whereFragment == null)
{
return;
}
if (!fromElement.UseWhereFragment && !joinFragment.HasThetaJoins)
{
return;
}
whereFragment = whereFragment.Trim();
if (StringHelper.IsEmpty(whereFragment.ToString()))
{
return;
}
// Forcefully remove leading ands from where fragments; the grammar will
// handle adding them
if (whereFragment.StartsWithCaseInsensitive("and"))
{
whereFragment = whereFragment.Substring(4);
}
log.Debug("Using unprocessed WHERE-fragment [" + whereFragment +"]");
SqlFragment fragment = (SqlFragment) Create(HqlSqlWalker.SQL_TOKEN, whereFragment.ToString());
fragment.SetJoinFragment(joinFragment);
fragment.FromElement = fromElement;
if (fromElement.IndexCollectionSelectorParamSpec != null)
{
fragment.AddEmbeddedParameter(fromElement.IndexCollectionSelectorParamSpec);
fromElement.IndexCollectionSelectorParamSpec = null;
}
if (hqlSqlWalker.IsFilter())
{
//if (whereFragment.IndexOfCaseInsensitive("?") >= 0)
if (whereFragment.ToString().IndexOf("?") >= 0)
{
IType collectionFilterKeyType = hqlSqlWalker.SessionFactoryHelper
.RequireQueryableCollection(hqlSqlWalker.CollectionFilterRole)
.KeyType;
CollectionFilterKeyParameterSpecification paramSpec = new CollectionFilterKeyParameterSpecification(
hqlSqlWalker.CollectionFilterRole,
collectionFilterKeyType,
0
);
fragment.AddEmbeddedParameter(paramSpec);
}
}
JoinProcessor.ProcessDynamicFilterParameters(
whereFragment,
fragment,
hqlSqlWalker
);
log.Debug("Using processed WHERE-fragment [" + fragment.Text + "]");
// Filter conditions need to be inserted before the HQL where condition and the
// theta join node. This is because org.hibernate.loader.Loader binds the filter parameters first,
// then it binds all the HQL query parameters, see org.hibernate.loader.Loader.processFilterParameters().
if (fragment.FromElement.IsFilter || fragment.HasFilterCondition)
{
if (_filters == null)
{
// Find or create the WHERE clause
IASTNode where = (IASTNode) query.WhereClause;
// Create a new FILTERS node as a parent of all filters
_filters = Create(HqlSqlWalker.FILTERS, "{filter conditions}");
// Put the FILTERS node before the HQL condition and theta joins
where.InsertChild(0, _filters);
}
// add the current fragment to the FILTERS node
_filters.AddChild(fragment);
}
else
{
if (_thetaJoins == null)
{
// Find or create the WHERE clause
IASTNode where = (IASTNode) query.WhereClause;
// Create a new THETA_JOINS node as a parent of all filters
_thetaJoins = Create(HqlSqlWalker.THETA_JOINS, "{theta joins}");
// Put the THETA_JOINS node before the HQL condition, after the filters.
if (_filters == null)
{
where.InsertChild(0, _thetaJoins);
}
else
{
_filters.AddSibling(_thetaJoins);
}
}
// add the current fragment to the THETA_JOINS node
_thetaJoins.AddChild(fragment);
}
}
public override void Resolve(bool generateJoin, bool implicitJoin, string classAlias, IASTNode parent)
{
if (IsResolved)
{
return;
}
FromReferenceNode collectionNode = ( FromReferenceNode )GetChild(0);
SessionFactoryHelperExtensions sessionFactoryHelper = SessionFactoryHelper;
collectionNode.ResolveIndex(this); // Fully resolve the map reference, create implicit joins.
IType type = collectionNode.DataType;
if (!type.IsCollectionType)
{
throw new SemanticException("The [] operator cannot be applied to type " + type);
}
string collectionRole = (( CollectionType )type).Role;
IQueryableCollection queryableCollection = sessionFactoryHelper.RequireQueryableCollection(collectionRole);
if (!queryableCollection.HasIndex)
{
throw new QueryException("unindexed fromElement before []: " + collectionNode.Path);
}
// Generate the inner join -- The elements need to be joined to the collection they are in.
FromElement fromElement = collectionNode.FromElement;
String elementTable = fromElement.TableAlias;
FromClause fromClause = fromElement.FromClause;
String path = collectionNode.Path;
FromElement elem = fromClause.FindCollectionJoin(path);
if (elem == null)
{
FromElementFactory factory = new FromElementFactory(fromClause, fromElement, path);
elem = factory.CreateCollectionElementsJoin(queryableCollection, elementTable);
if (Log.IsDebugEnabled)
{
Log.Debug("No FROM element found for the elements of collection join path " + path
+ ", created " + elem);
}
}
else
{
if (Log.IsDebugEnabled)
{
Log.Debug("FROM element found for collection join path " + path);
}
}
// The 'from element' that represents the elements of the collection.
FromElement = fromElement;
// Add the condition to the join sequence that qualifies the indexed element.
IASTNode selector = GetChild(1);
if (selector == null)
{
throw new QueryException("No index value!");
}
// Sometimes use the element table alias, sometimes use the... umm... collection table alias (many to many)
String collectionTableAlias = elementTable;
if (elem.CollectionTableAlias != null)
{
collectionTableAlias = elem.CollectionTableAlias;
}
// TODO: get SQL rendering out of here, create an AST for the join expressions.
// Use the SQL generator grammar to generate the SQL text for the index expression.
JoinSequence joinSequence = fromElement.JoinSequence;
string[] indexCols = queryableCollection.IndexColumnNames;
if (indexCols.Length != 1)
{
throw new QueryException("composite-index appears in []: " + collectionNode.Path);
}
SqlGenerator gen = new SqlGenerator(SessionFactoryHelper.Factory, new CommonTreeNodeStream(selector));
try
{
gen.simpleExpr(); //TODO: used to be exprNoParens! was this needed?
}
catch (RecognitionException e)
{
throw new QueryException(e.Message, e);
}
string selectorExpression = gen.GetSQL().ToString();
joinSequence.AddCondition(new SqlString(collectionTableAlias + '.' + indexCols[0] + " = " + selectorExpression));
//joinSequence.AddCondition(collectionTableAlias, new string[] { indexCols[0] }, selectorExpression, false);
IList <IParameterSpecification> paramSpecs = gen.GetCollectedParameters();
if (paramSpecs != null)
{
switch (paramSpecs.Count)
{
case 0:
// nothing to do
break;
case 1:
IParameterSpecification paramSpec = paramSpecs[0];
paramSpec.ExpectedType = queryableCollection.IndexType;
fromElement.SetIndexCollectionSelectorParamSpec(paramSpec);
break;
default:
fromElement.SetIndexCollectionSelectorParamSpec(
new AggregatedIndexCollectionSelectorParameterSpecifications(paramSpecs)
);
break;
}
}
// Now, set the text for this node. It should be the element columns.
String[] elementColumns = queryableCollection.GetElementColumnNames(elementTable);
Text = elementColumns[0];
IsResolved = true;
}
private void AddDestination(FromElement fromElement)
{
_destinations.Add(fromElement);
}
private void AddJoinNodes(QueryNode query, JoinSequence join, FromElement fromElement)
{
JoinFragment joinFragment = join.ToJoinFragment(
_walker.EnabledFilters,
fromElement.UseFromFragment || fromElement.IsDereferencedBySuperclassOrSubclassProperty,
fromElement.WithClauseFragment,
fromElement.WithClauseJoinAlias
);
SqlString frag = joinFragment.ToFromFragmentString;
SqlString whereFrag = joinFragment.ToWhereFragmentString;
// If the from element represents a JOIN_FRAGMENT and it is
// a theta-style join, convert its type from JOIN_FRAGMENT
// to FROM_FRAGMENT
if ( fromElement.Type == HqlSqlWalker.JOIN_FRAGMENT &&
( join.IsThetaStyle || SqlStringHelper.IsNotEmpty( whereFrag ) ) )
{
fromElement.Type = HqlSqlWalker.FROM_FRAGMENT;
fromElement.JoinSequence.SetUseThetaStyle( true ); // this is used during SqlGenerator processing
}
// If there is a FROM fragment and the FROM element is an explicit, then add the from part.
if ( fromElement.UseFromFragment /*&& StringHelper.isNotEmpty( frag )*/ )
{
SqlString fromFragment = ProcessFromFragment( frag, join ).Trim();
if ( log.IsDebugEnabled )
{
log.Debug( "Using FROM fragment [" + fromFragment + "]" );
}
ProcessDynamicFilterParameters(fromFragment,fromElement,_walker);
}
_syntheticAndFactory.AddWhereFragment(
joinFragment,
whereFrag,
query,
fromElement,
_walker
);
}
public void AddCollectionJoinFromElementByPath(string path, FromElement destination)
{
if (Log.IsDebugEnabled)
{
Log.Debug("addCollectionJoinFromElementByPath() : " + path + " -> " + destination);
}
_collectionJoinFromElementsByPath.Add(path, destination); // Add the new node to the map so that we don't create it twice.
}
public override object Create(IToken payload)
{
if (payload == null)
{
return(base.Create(payload));
}
object ret;
switch (payload.Type)
{
case HqlSqlWalker.SELECT:
case HqlSqlWalker.QUERY:
ret = new QueryNode(payload);
break;
case HqlSqlWalker.UPDATE:
ret = new UpdateStatement(payload);
break;
case HqlSqlWalker.DELETE:
ret = new DeleteStatement(payload);
break;
case HqlSqlWalker.INSERT:
ret = new InsertStatement(payload);
break;
case HqlSqlWalker.INTO:
ret = new IntoClause(payload);
break;
case HqlSqlWalker.FROM:
ret = new FromClause(payload);
break;
case HqlSqlWalker.FROM_FRAGMENT:
ret = new FromElement(payload);
break;
case HqlSqlWalker.IMPLIED_FROM:
ret = new ImpliedFromElement(payload);
break;
case HqlSqlWalker.DOT:
ret = new DotNode(payload);
break;
case HqlSqlWalker.INDEX_OP:
ret = new IndexNode(payload);
break;
// Alias references and identifiers use the same node class.
case HqlSqlWalker.ALIAS_REF:
case HqlSqlWalker.IDENT:
ret = new IdentNode(payload);
break;
case HqlSqlWalker.SQL_TOKEN:
ret = new SqlFragment(payload);
break;
case HqlSqlWalker.METHOD_CALL:
ret = new MethodNode(payload);
break;
case HqlSqlWalker.ELEMENTS:
case HqlSqlWalker.INDICES:
ret = new CollectionFunction(payload);
break;
case HqlSqlWalker.SELECT_CLAUSE:
ret = new SelectClause(payload);
break;
case HqlSqlWalker.SELECT_EXPR:
ret = new SelectExpressionImpl(payload);
break;
case HqlSqlWalker.AGGREGATE:
ret = new AggregateNode(payload);
break;
case HqlSqlWalker.COUNT:
ret = new CountNode(payload);
break;
case HqlSqlWalker.CONSTRUCTOR:
ret = new ConstructorNode(payload);
break;
case HqlSqlWalker.NUM_INT:
case HqlSqlWalker.NUM_FLOAT:
case HqlSqlWalker.NUM_LONG:
case HqlSqlWalker.NUM_DOUBLE:
case HqlSqlWalker.QUOTED_String:
ret = new LiteralNode(payload);
break;
case HqlSqlWalker.TRUE:
case HqlSqlWalker.FALSE:
ret = new BooleanLiteralNode(payload);
break;
case HqlSqlWalker.JAVA_CONSTANT:
ret = new JavaConstantNode(payload);
break;
case HqlSqlWalker.ORDER:
ret = new OrderByClause(payload);
break;
case HqlSqlWalker.PLUS:
case HqlSqlWalker.MINUS:
case HqlSqlWalker.STAR:
case HqlSqlWalker.DIV:
case HqlSqlWalker.BAND:
case HqlSqlWalker.BOR:
case HqlSqlWalker.BXOR:
ret = new BinaryArithmeticOperatorNode(payload);
break;
case HqlSqlWalker.UNARY_MINUS:
case HqlSqlWalker.UNARY_PLUS:
case HqlSqlWalker.BNOT:
ret = new UnaryArithmeticNode(payload);
break;
case HqlSqlWalker.CASE2:
ret = new Case2Node(payload);
break;
case HqlSqlWalker.CASE:
ret = new CaseNode(payload);
break;
case HqlSqlWalker.PARAM:
case HqlSqlWalker.NAMED_PARAM:
ret = new ParameterNode(payload);
break;
case HqlSqlWalker.EQ:
case HqlSqlWalker.NE:
case HqlSqlWalker.LT:
case HqlSqlWalker.GT:
case HqlSqlWalker.LE:
case HqlSqlWalker.GE:
case HqlSqlWalker.LIKE:
case HqlSqlWalker.NOT_LIKE:
ret = new BinaryLogicOperatorNode(payload);
break;
case HqlSqlWalker.IN:
case HqlSqlWalker.NOT_IN:
ret = new InLogicOperatorNode(payload);
break;
case HqlSqlWalker.BETWEEN:
case HqlSqlWalker.NOT_BETWEEN:
ret = new BetweenOperatorNode(payload);
break;
case HqlSqlWalker.IS_NULL:
ret = new IsNullLogicOperatorNode(payload);
break;
case HqlSqlWalker.IS_NOT_NULL:
ret = new IsNotNullLogicOperatorNode(payload);
break;
case HqlSqlWalker.EXISTS:
ret = new UnaryLogicOperatorNode(payload);
break;
default:
ret = new SqlNode(payload);
break;
}
Initialise(ret);
return(ret);
}
public void RegisterFromElement(FromElement element)
{
_fromElements.Add(element);
string classAlias = element.ClassAlias;
if (classAlias != null)
{
// The HQL class alias refers to the class name.
_fromElementByClassAlias.Add(classAlias, element);
}
// Associate the table alias with the element.
string tableAlias = element.TableAlias;
if (tableAlias != null)
{
_fromElementByTableAlias[tableAlias] = element;
}
}
protected FromElementType(FromElement fromElement)
{
_fromElement = fromElement;
}
