public override void Visit (UnionStatement unionStatement)
{
VisitUnion (unionStatement, false);
}
void VisitUnion (UnionStatement unionStatement, bool parenthesize)
{
foreach (SelectStatement query in unionStatement.SelectExpressions) {
if (parenthesize) {
_Query.Append (" ( ");
query.Accept (this);
_Query.Append (" ) ");
} else
query.Accept (this);
if (unionStatement.SelectExpressions.IndexOf (query) != unionStatement.SelectExpressions.Count - 1)
_Query.Append ("UNION ");
}
if (unionStatement.OrderByClause != null)
unionStatement.OrderByClause.Accept (this);
}
/// <summary>
///
/// </summary>
/// <param name="firstIsType"></param>
/// <param name="isInConstraint"></param>
/// <param name="lastIsAttribute"></param>
/// <param name="overrideId">True, if the Path is into a constraint and queried an attribute through Reference
/// (Person[Brother.MyKind.Name = 'nice'])</param>
public void ConvertToSQL(Path path, bool firstIsType, bool isInConstraint, bool lastIsAttribute, bool overrideId)
{
int index = 0;
// Process the first entity
if (firstIsType)
{
Identifier ident = path.Identifiers[index++];
// Exception management : entity mapping
EntityMapping entityMapping = _Mapping.Entities[ident.Value, true];
// Save entity mapping current context
entityMappingContext.Push(entityMapping);
entityModelContext.Push(_Model.GetEntity(ident.Value, true));
ProcessEntity(ident, false);
}
// Restore the first entity context
EntityMapping firstMapping = (EntityMapping)entityMappingContext.Peek();
Table firstTable = (Table)tableContext.Peek();
// Process references
int lastIndex = lastIsAttribute ? path.Identifiers.Count - 1 : path.Identifiers.Count;
bool isFirstReference = true;
ArrayList collEpression = new ArrayList();
int stackCount = entityMappingContext.Count;
Evaluant.Uss.Models.Entity previousEntityModel = (Evaluant.Uss.Models.Entity)entityModelContext.Peek();
for (; index < lastIndex; index++)
{
Identifier ident = path.Identifiers[index];
UnionStatement childrenSubExp = new UnionStatement();
//childrenSubExp.TableAlias = ident.Value;
Evaluant.Uss.Models.Reference reference =
_Model.GetReference(previousEntityModel.Type, ident.Value, true);
// ident.Value isn't a reference but an attribute
if (_Model.GetReference(previousEntityModel.Type, ident.Value) == null &&
_Model.GetAttribute(previousEntityModel.Type, ident.Value) != null)
{
EntityMapping tmpMap = _Mapping.Entities[previousEntityModel.Type];
entityMappingContext.Push(tmpMap);
entityModelContext.Push(_Model.GetEntity(previousEntityModel.Type));
continue;
}
Evaluant.Uss.Models.Entity currentModel = previousEntityModel; //Model.GetEntity(previousEntityModel.Type);
while (_Model.GetParent(currentModel) != null && reference == null)
{
currentModel = Model.GetParent(currentModel);
// ident.Value isn't a reference but an attribute
if (_Model.GetReference(currentModel.Type, ident.Value) == null &&
_Model.GetAttribute(currentModel.Type, ident.Value) != null)
continue;
reference = _Model.GetReference(currentModel.Type, ident.Value);
if (reference != null)
break;
}
// Restore parent context
EntityMapping parentMapping = index == 0 && isInConstraint ? (EntityMapping)entityMappingContext.Peek() : (EntityMapping)entityMappingContext.Pop();
Evaluant.Uss.Models.Entity parentModel =
index == 0 && isInConstraint ? (Evaluant.Uss.Models.Entity)entityModelContext.Peek() : (Evaluant.Uss.Models.Entity)entityModelContext.Pop();
string cType = reference.ChildType;
previousEntityModel = _Model.GetEntity(cType, true);
Table parentTable = (Table)tableContext.Pop();
SelectStatement parentQuery = (SelectStatement)queryContext.Pop();
// Get tree for reference.ChildType
IList childrenSubTypes = _Model.GetTree(cType);
// Get all fullname attributes
StringCollection attributes = new StringCollection();
attributes.AddRange(_Model.GetFullAttributesNames(cType));
Hashtable subQueries = new Hashtable();
foreach (Evaluant.Uss.Models.Entity child in childrenSubTypes)
{
if (_Mapping.Entities[child.Type] == null)
continue;
string refName = ident.Value;
ReferenceMapping referenceMapping = parentMapping.References[refName];
Evaluant.Uss.Models.Entity current = Model.GetEntity(parentMapping.Type);
if (referenceMapping == null)
{
while (_Model.GetParent(current) != null)
{
current = Model.GetParent(current);
referenceMapping = _Mapping.Entities[current.Type].References[refName];
if (referenceMapping != null)
break;
}
}
if (referenceMapping == null)
throw new MappingNotFoundException(String.Format("Reference [{0}] not found in Type [{1}]", ident.Value, parentMapping.Type));
RuleMappingCollection ruleMapping = referenceMapping.Rules;
// Save child mapping context
EntityMapping childMapping = _Mapping.Entities[child.Type];
entityMappingContext.Push(childMapping);
entityModelContext.Push(_Model.GetEntity(child.Type));
// Process child mapping reference
ProcessEntity(ident, true);
// Restore child context
Table childTable = (Table)tableContext.Pop();
SelectStatement childQuery = (SelectStatement)queryContext.Pop();
childQuery.TableAlias = childTable.TableAlias;
childQuery.SelectList = new ExpressionCollection();
// Begin to the first INNER JOIN
Table righFirstTableJoinTable = null;
// la référence précedente a une contrainte avec Attribute Table de type INNER JOIN
if (isFirstReference && parentTable.GetType() == typeof(JoinedTable))
righFirstTableJoinTable = parentQuery;
// la référence précedente suit une autre référence de type INNER JOIN
else if (!isFirstReference && parentTable.GetType() == typeof(JoinedTable))
{
righFirstTableJoinTable = parentTable;
foreach (ILogicExpression exp in parentQuery.WhereClause.SearchCondition)
{
childQuery.WhereClause.SearchCondition.Add(exp);
}
}
// autre cas
else if (parentTable.GetType() == typeof(TableSource))
{
righFirstTableJoinTable = parentTable;
// Ajoute les clauses Wheres de la table courante
if (!isInConstraint)
foreach (ILogicExpression exp in parentQuery.WhereClause.SearchCondition)
{
childQuery.WhereClause.SearchCondition.Add(exp);
}
}
else
{
righFirstTableJoinTable = parentTable;
if (righFirstTableJoinTable.TableAlias == null || righFirstTableJoinTable.TableAlias == string.Empty)
righFirstTableJoinTable.TableAlias = refName;
}
Table leftFirstJoinTable = ruleMapping.Count != 1 ? new TableSource(ruleMapping[0], ruleMapping[0].ChildTable, "rule" + index) : childTable;
string parentFieldTable = righFirstTableJoinTable.TableAlias;
for (int indexId = 0; indexId < referenceMapping.EntityParent.Ids.Count; indexId++)
{
PrimaryKeyMapping pmk = referenceMapping.EntityParent.Ids[indexId];
string idfield = string.Empty;
if (righFirstTableJoinTable.GetType() == typeof(TableSource))
idfield = referenceMapping.EntityParent.GetIdField(pmk);
else
idfield = referenceMapping.EntityParent.GetIdFieldAs(pmk);
string alias = GetParentIdAlias(referenceMapping.EntityParent, pmk.Field);
childQuery.SelectList.Add(new Column(ruleMapping[0], parentFieldTable, idfield, alias));
}
// Multiple Key
foreach (PrimaryKeyMapping pkm in childMapping.Ids)
childQuery.SelectList.Add(new Column(ruleMapping[ruleMapping.Count - 1], childQuery.TableAlias, childMapping.GetIdField(pkm), childMapping.GetIdFieldAs(pkm)));
// adds all foreign keys contained in the current table that will be used by the next reference
if (index + 1 < lastIndex)
{
Identifier nextIdent = path.Identifiers[index + 1];
Models.Entity type = child;
while (_Mapping.Entities[type.Type].References[nextIdent.Value] == null)
type = Model.GetEntity(type.Inherit, true);
if (_Mapping.Entities[type.Type].References[nextIdent.Value] == null)
break;
RuleMappingCollection rules = _Mapping.Entities[type.Type].References[nextIdent.Value].Rules;
if (rules.Count == 1
&& rules[0].ParentField != referenceMapping.EntityParent.IdFields
&& rules[0].ParentField != childMapping.IdFields)
{
foreach (string parentField in rules[0].ParentField.Split(SqlMapperProvider.IDSEP))
childQuery.SelectList.Add(new Column(rules[0], childQuery.TableAlias, parentField, parentField));
}
}
// specify relation role name
if (!string.IsNullOrEmpty(referenceMapping.DiscriminatorField))
{
childQuery.WhereClause.SearchCondition.Add(
new BinaryLogicExpression(
new Column(referenceMapping, leftFirstJoinTable.TableAlias, referenceMapping.DiscriminatorField),
BinaryLogicOperator.Equals,
new Constant(referenceMapping.DiscriminatorValue, DbType.AnsiString)
));
}
// inner join on index table FK_Parent
JoinedTable firstJoinTable = new JoinedTable(leftFirstJoinTable, TypeJoinedTable.Inner, righFirstTableJoinTable);
firstJoinTable.TableAlias = leftFirstJoinTable.TableAlias;
for (int indexId = 0; indexId < ruleMapping[0].ParentFields.Length; indexId++)
{
string childField = ruleMapping[0].ChildFields[indexId];
string parentField = ruleMapping[0].ParentFields[indexId];
string idField = parentMapping.Ids.Count > indexId ? parentMapping.Ids[indexId].Field : string.Empty;
string parentid = ruleMapping[0].GetParentFieldAs();
if (righFirstTableJoinTable.GetType() == typeof(TableSource) || (ruleMapping.Count == 1 && parentField != idField))
parentid = parentField;
firstJoinTable.SearchConditions.Add(new BinaryLogicExpression(
new Column(ruleMapping[0], righFirstTableJoinTable.TableAlias, parentid),
BinaryLogicOperator.Equals,
new Column(ruleMapping[0], leftFirstJoinTable.TableAlias, childField)));
}
if (!string.IsNullOrEmpty(childMapping.DiscriminatorField))
{
BinaryLogicExpression discriminator = new BinaryLogicExpression(
new Column(childMapping, childQuery.TableAlias, childMapping.DiscriminatorField),
BinaryLogicOperator.Equals,
new Constant(childMapping.DiscriminatorValue, DbType.AnsiStringFixedLength)
);
childQuery.WhereClause.SearchCondition.Add(discriminator);
}
if (ruleMapping.Count == 1)
childQuery.FromClause.Add(firstJoinTable);
// Fin Construction du premier INNER JOIN
if (isInConstraint && ruleMapping.Count == 1 && index == 0)
{
// Restore the first entity context
Table mainTable = (Table)tableContext.Peek();
if (ruleMapping[0].ParentFields.Length > 1)
{
MultipledKey parentKey = new MultipledKey(ruleMapping[0]);
MultipledKey childKey = new MultipledKey(ruleMapping[0]);
foreach (string key in ruleMapping[0].ParentFields)
{
parentKey.Collection.Add(new Column(ruleMapping[0], firstTable.TableAlias, key)); // parent table/column link
childKey.Collection.Add(new Column(ruleMapping[0], mainTable.TableAlias, key)); // child table/column link
}
linkTableContext.Push(parentKey); // parent table/column link
linkTableContext.Push(childKey); // child table/column link
}
else
{
linkTableContext.Push(new Column(ruleMapping[0], firstTable.TableAlias, ruleMapping[0].ParentField)); // parent table/column link
linkTableContext.Push(new Column(ruleMapping[0], mainTable.TableAlias, ruleMapping[0].ParentField)); // child table/column link
}
}
tableContext.Push(firstJoinTable);
for (int i = 1; i < ruleMapping.Count; i++)
{
firstJoinTable = (JoinedTable)tableContext.Pop();
JoinedTable lastJoinTable = null;
// la référence courante possède une contrainte qui est de type INNER JOIN
if (ident.Constraint != null && childTable.GetType() == typeof(JoinedTable))
{
SelectStatement query = new SelectStatement(referenceMapping);
query.TableAlias = childTable.TableAlias;
lastJoinTable = new JoinedTable(childQuery, TypeJoinedTable.Inner, firstJoinTable);
lastJoinTable.TableAlias = childQuery.TableAlias;
lastJoinTable.SearchConditions.Add(new BinaryLogicExpression(
new Column(ruleMapping[i], childQuery.TableAlias, ruleMapping[i].ChildField),
BinaryLogicOperator.Equals,
new Column(ruleMapping[i], leftFirstJoinTable.TableAlias, ruleMapping[i].ParentField)));
query.SelectList.Add(new Column(childMapping.Ids[0], childQuery.TableAlias, childMapping.GetIdField(childMapping.Ids[0])));
childQuery = query;
tableContext.Push(lastJoinTable);
}
else
{
Table leftTable = i == ruleMapping.Count - 1 ? childTable : new TableSource(ruleMapping[i], ruleMapping[i].ChildTable, String.Concat("rule", index + i));
Table rightTable = firstJoinTable;
lastJoinTable = new JoinedTable(leftTable, TypeJoinedTable.Inner, rightTable);
lastJoinTable.TableAlias = leftTable.TableAlias;
// inner join on index table FK_Child
lastJoinTable.SearchConditions.Add(new BinaryLogicExpression(
new Column(ruleMapping[i], leftTable.TableAlias, ruleMapping[i].ChildField),
BinaryLogicOperator.Equals,
new Column(ruleMapping[i], rightTable.TableAlias, ruleMapping[i].ParentField)));
tableContext.Push(lastJoinTable);
}
// it's a last rule
if (i == ruleMapping.Count - 1)
{
lastJoinTable = (JoinedTable)tableContext.Pop();
if (isInConstraint && index == lastIndex - 1)
{
// Restore the first entity context
EntityMapping mainMapping = (EntityMapping)entityMappingContext.Peek();
Table mainTable = (Table)tableContext.Peek();
string parentField = firstMapping.GetIdField(firstMapping.Ids[0]);
if (path.Identifiers.Count > 1 && (!lastIsAttribute || overrideId))
parentField = "ParentId";
linkTableContext.Push(new Column(firstMapping.Ids[0], parentTable.TableAlias, parentField)); // parent table/column link
linkTableContext.Push(new Column(firstMapping.Ids[0], mainTable.TableAlias, firstMapping.GetIdField(firstMapping.Ids[0]))); // child table/column link
}
if (referenceMapping.DiscriminatorField != null && referenceMapping.Name != "*")
{
BinaryLogicExpression condition = new BinaryLogicExpression(
new Column(referenceMapping, leftFirstJoinTable.TableAlias, referenceMapping.DiscriminatorField),
BinaryLogicOperator.Equals,
new Constant(ident.Value, DbType.AnsiString));
collEpression.Add(condition);
}
childQuery.FromClause.Add(lastJoinTable);
tableContext.Push(lastJoinTable);
}
}
childQuery.SelectList.Insert(0, new Constant(child.Type, DbType.AnsiString, TYPE_ALIAS));
int attributeTableIndex = 0;
foreach (string attName in attributes)
{
string attNameAlias = attName.Substring(attName.LastIndexOf(DOT) + 1);
string shortAttName = attNameAlias;
AttributeMapping am = childMapping.Attributes[shortAttName];
// if duplicated attribute name, add an incremented index at the end (if not already done)
if (!_IsAliasColumnComputed)
{
foreach (string colName in _AliasColumnMapping.Values)
{
if (colName == shortAttName)
{
if (!_AliasColumnMapping.Contains(attName))
{
attNameAlias += ++_AliasColumnIndexNumber;
_AliasColumnMapping.Add(attName, attNameAlias);
}
else
attNameAlias = _AliasColumnMapping[attName].ToString();
break;
}
}
}
else
{
// get the previous computed alias
attNameAlias = _AliasColumnMapping[attName].ToString();
}
if (am != null)
{
if (am.Table == childMapping.Table)
{
childQuery.SelectList.Add(new Column(am, childQuery.TableAlias, am.Field, attNameAlias));
}
if (am.Table != childMapping.Table && childMapping.Ids[0].Generator.Name == GeneratorMapping.GeneratorType.inherited)
{
// Add the Left Join for parent attribute table
Table left = childQuery.FromClause[0];
Table right = new TableSource(am.ParentEntity.Ids[0], am.Table, string.Concat("a", attributeTableIndex++));
JoinedTable jt = new JoinedTable(left, TypeJoinedTable.LeftOuter, right);
jt.SearchConditions.Add(new BinaryLogicExpression(
new Column(null, right.TableAlias, am.ParentField),
BinaryLogicOperator.Equals,
new Column(null, left.TableAlias, childMapping.GetIdField(childMapping.Ids[0]))
));
childQuery.FromClause[0] = jt;
childQuery.SelectList.Add(new Column(am, right.TableAlias, am.Field, attNameAlias));
// Get the parent table and insert a clause and then we don't return the
// records which have a record in a child table
string parentType = string.Empty;
if (_Model.GetParent(_Model.GetEntity(child.Type)) != null)
parentType = _Model.GetParent(_Model.GetEntity(child.Type)).Type;
if (parentType == string.Empty)
continue;
EntityMapping parentEntityMapping = _Mapping.Entities[parentType];
SelectStatement sel = (SelectStatement)subQueries[parentType];
SelectStatement exludeClause = new SelectStatement(null);
exludeClause.SelectedAllColumns = true;
exludeClause.FromClause.Add(new TableSource(childMapping, childMapping.Table));
exludeClause.WhereClause.SearchCondition.Add(new BinaryLogicExpression(
new Column(parentEntityMapping.Ids[0], sel.TableAlias, parentEntityMapping.GetIdField(parentEntityMapping.Ids[0])),
BinaryLogicOperator.Equals,
new Column(childMapping.Ids[0], childMapping.Table, childMapping.GetIdField(childMapping.Ids[0]))));
ExistsPredicate ex = new ExistsPredicate(exludeClause);
UnaryLogicExpression ua = new UnaryLogicExpression(UnaryLogicOperator.Not, ex);
sel.WhereClause.SearchCondition.Add(ua);
}
}
else
{
childQuery.SelectList.Add(new Constant(DBNull.Value, DbType.AnsiStringFixedLength, attNameAlias));
}
// Store the correspondance between the alias/column name and the attribute name
if (!_IsAliasColumnComputed && !_AliasColumnMapping.Contains(attName))
_AliasColumnMapping.Add(attName, attNameAlias);
}
// entityMappingContext.Pop();
// entityModelContext.Pop();
tableContext.Pop();
//childrenSubExp.SelectExpressions.Add(childQuery);
subQueries.Add(child.Type, childQuery);
}
foreach (SelectStatement sel in subQueries.Values)
childrenSubExp.SelectExpressions.Add(sel);
childrenSubExp.TableAlias = parentQuery.TableAlias;
if (parentQuery.SelectList.Count == 0)
{
//parentQuery.SelectedAllColumns = true;
}
//isFirstReference = false;
queryContext.Push(childrenSubExp);
//entityMappingContext.Push(_Mapping.Entities.GetEntity(cType));
//entityModelContext.Push(_Model.GetEntity(cType));
//if(!isInConstraint)
tableContext.Push(childrenSubExp);
// queryContext.Push(childQuery);
}
// if only one attribute
if (lastIsAttribute && index == 0)
{
//FROM [Course] as [e2]
//WHERE ([e2].[CourseId] = [e1].[CourseId])
SelectStatement childQuery = (SelectStatement)queryContext.Pop();
firstTable = (Table)tableContext.Pop();
childQuery.FromClause.Add(firstTable);
Table mainTable = (Table)tableContext.Peek();
childQuery.WhereClause.SearchCondition.Add(
new BinaryLogicExpression(new Column(null, firstTable.TableAlias, firstMapping.GetIdField(firstMapping.Ids[0])),
BinaryLogicOperator.Equals,
new Column(null, mainTable.TableAlias, firstMapping.GetIdField(firstMapping.Ids[0]))));
queryContext.Push(childQuery);
tableContext.Push(firstTable);
}
if (isInConstraint)
{
int max = entityMappingContext.Count;
if (lastIsAttribute)
max--;
for (int i = max; i > stackCount; i--)
{
entityMappingContext.Pop();
entityModelContext.Pop();
}
}
}
public ISQLExpression TransformToSql(Path path, string[] attributes, string[] orderby, bool lastIsAttribute)
{
// Get all the entity of the hierarchy (parent and children)
string baseType = path.Identifiers[0].Value;
IList tree = _Model.GetTree(baseType);
_UserAttributes = new StringCollection();
// attributes == null => don't get attributes
if (attributes != null)
{
// Get the specified class and store all the inherited classes
Evaluant.Uss.Models.Entity parent = null;
Evaluant.Uss.Models.EntityCollection parents = new Evaluant.Uss.Models.EntityCollection();
if (path.Identifiers.Count == 1)
parent = _Model.GetEntity(path.Identifiers[0].Value);
else
{
string refName = path.Identifiers[path.Identifiers.Count - 1].Value;
string firstType = path.Identifiers[0].Value;
string lastType = firstType;
string nextRefName = string.Empty;
for (int i = 0; i < path.Identifiers.Count - 1; i++)
{
nextRefName = path.Identifiers[i + 1].Value;
// The next identifier isn't a reference but an attribute
if (_Model.GetReference(lastType, nextRefName) == null &&
_Model.GetAttribute(lastType, nextRefName) != null)
continue;
lastType = _Model.GetReference(lastType, nextRefName, true).ChildType;
}
parent = _Model.GetEntity(lastType);
}
if (parent == null)
throw new Evaluant.Uss.Models.ModelElementNotFoundException(String.Format("The type [{0}] was not found. Check your metadata.", baseType));
if (attributes.Length == 0)
{
// attributes.Length == 0 => get all attributes
_UserAttributes.AddRange(_Model.GetFullAttributesNames(parent.Type));
}
else
{
// attributes.Length > 0 => get the user defined attributes
foreach (string attName in attributes)
{
_UserAttributes.Add(_Model.GetFullAttributeName(attName, parent.Type));
}
}
}
UnionStatement sqlQuery = new UnionStatement();
// Process each entity of the tree and put the corresponding sql query
// into a UnionStatement
StringCollection processedTables = new StringCollection();
_BaseType = path.Identifiers[0].Value;
Hashtable expressions = new Hashtable();
string commonIdField = string.Empty;
foreach (Evaluant.Uss.Models.Entity entity in tree)
{
// If the entity doesn't have a mapping => don't process it
if (_Mapping.Entities[entity.Type] == null)
continue;
path.Identifiers[0].Value = entity.Type;
EntityMapping entityMapping = _Mapping.Entities[entity.Type];
if (processedTables.Contains(entityMapping.Table))
continue;
processedTables.Add(entityMapping.Table);
_ExprLevel.Push(PATH);
SelectStatement exp = (SelectStatement)TransformToSql(path, _UserAttributes, true, lastIsAttribute);
_ExprLevel.Pop();
// process alias name calculation only once
_IsAliasColumnComputed = true;
expressions.Add(entity.Type, exp);
string parentType = string.Empty;
if (_Model.GetParent(_Model.GetEntity(entity.Type)) != null)
parentType = _Model.GetParent(_Model.GetEntity(entity.Type)).Type;
if (parentType == string.Empty || entityMapping.Ids[0].Generator.Name != GeneratorMapping.GeneratorType.inherited || parentType != _BaseType)
continue;
EntityMapping parentMapping = _Mapping.Entities[parentType];
SelectStatement sel = (SelectStatement)expressions[parentType];
SelectStatement exludeClause = new SelectStatement(null);
exludeClause.SelectedAllColumns = true;
exludeClause.FromClause.Add(new TableSource(entityMapping, entityMapping.Table));
string parentIdField = parentMapping.GetIdField(parentMapping.Ids[0]);
if (path.Identifiers.Count > 1)
parentIdField = "ParentId";
exludeClause.WhereClause.SearchCondition.Add(new BinaryLogicExpression(
new Column(parentMapping.Ids[0], sel.TableAlias, parentIdField),
BinaryLogicOperator.Equals,
new Column(entityMapping.Ids[0], entityMapping.Table, entityMapping.GetIdField(entityMapping.Ids[0]))));
ExistsPredicate ex = new ExistsPredicate(exludeClause);
UnaryLogicExpression ua = new UnaryLogicExpression(UnaryLogicOperator.Not, ex);
sel.WhereClause.SearchCondition.Add(ua);
//sqlQuery.SelectExpressions.Add(exp);
}
//If there are many tables in the union statement, make the id fields aliases identical
bool isFirstSelect = true;
ArrayList idAliases = new ArrayList();
foreach (ISQLExpression exp in expressions.Values)
{
SelectStatement innerSelect = (SelectStatement)exp;
if (isFirstSelect)
{
foreach (ISQLExpression innerExp in innerSelect.SelectList)
{
if (innerExp is Column && ((Column)innerExp).Alias.StartsWith(EntityMapping.PREFIX_ID))
idAliases.Add(((Column)innerExp).Alias);
}
isFirstSelect = false;
}
else
{
int i = 0;
foreach (ISQLExpression innerExp in innerSelect.SelectList)
{
if (innerExp is Column && ((Column)innerExp).Alias.StartsWith(EntityMapping.PREFIX_ID))
{
if (idAliases.Count > i)
((Column)innerExp).Alias = (string)idAliases[i];
else
throw new UniversalStorageException(string.Format("entity Id fields do not meet the one of its parent '{0}'", _BaseType));
i++;
}
}
}
//Add the SelectStatement to the unionStatement
sqlQuery.SelectExpressions.Add(innerSelect);
}
if (entityMappingContext.Count == 0)
{
throw new MappingNotFoundException(String.Format("Type not found [{0}]", baseType));
}
EntityMapping em = (EntityMapping)entityMappingContext.Peek();
if (orderby != null)
{
for (int i = 0; i < orderby.Length; i++)
{
string order = orderby[i].Trim();
if (order != string.Empty)
{
bool isDesc = false;
OrderByClauseColumn col = null;
int indexOfDirection = 0;
if ((indexOfDirection = order.ToLower().IndexOf(" desc")) > 0)
{
order = order.Substring(0, indexOfDirection).Trim();
isDesc = true;
}
else if ((indexOfDirection = order.ToLower().IndexOf(" asc")) > 0)
order = order.Substring(0, indexOfDirection).Trim();
if (order == "Id")
{
col = new OrderByClauseColumn(em.GetIdField(em.Ids[0]), true);
}
else
{
AttributeMapping orderMapping = em.Attributes[order, true];
string orderColName = orderMapping.Name;
string fullAttributeName = _Model.GetFullAttributeName(orderMapping.Name, orderMapping.ParentEntity.Type);
if (_AliasColumnMapping.Contains(fullAttributeName))
orderColName = _AliasColumnMapping[fullAttributeName].ToString();
col = new OrderByClauseColumn(orderColName, isDesc);
}
sqlQuery.OrderByClause.Add(col);
}
}
}
if (sqlQuery.OrderByClause.Count == 0 && !lastIsAttribute && orderby != null)
{
// Id position = 1 if loading single Entity (Person or Person[Name = 'p1']
// Id position = 2 if loading referenced Entity (Person.Partners or Person[Name = 'p1'].Partners)
int idPosition = (path.Identifiers.Count == 1) ? 1 : 2;
if (idPosition == 2)
idPosition = _Mapping.Entities[path.Identifiers[0].Value].Ids.Count + 1;
Column columnId = (Column)sqlQuery.SelectExpressions[0].SelectList[idPosition];
// get the Id alias of the first SelectStatement in case of UnionStatement
if (sqlQuery.SelectExpressions[0] is UnionStatement)
{
columnId = (Column)((UnionStatement)sqlQuery.SelectExpressions[0]).SelectExpressions[0].SelectList[idPosition];
}
EntityMapping entityMap = null;
if (columnId.TagMapping is PrimaryKeyMapping)
entityMap = ((PrimaryKeyMapping)columnId.TagMapping).ParentEntity;
if (columnId.TagMapping is RuleMapping)
{
if (idPosition == 2)
entityMap = _Mapping.Entities[((RuleMapping)columnId.TagMapping).ParentReference.EntityChild];
else
entityMap = ((RuleMapping)columnId.TagMapping).ParentReference.EntityParent;
}
if (entityMap != null)
{
SelectStatement selectQuery = sqlQuery;
if (sqlQuery is UnionStatement && ((UnionStatement)sqlQuery).SelectExpressions.Count > 0)
selectQuery = ((UnionStatement)sqlQuery).SelectExpressions[0] as SelectStatement;
foreach (PrimaryKeyMapping pkm in entityMap.Ids)
{
OrderByClauseColumn orderCol = null;
foreach (ISQLExpression exp in selectQuery.SelectList)
{
if (exp is Column && exp.TagMapping == pkm)
{
Column col = exp as Column;
orderCol = new OrderByClauseColumn(col.Alias);
break;
}
}
if (orderCol == null)
{
AttributeMapping attribute = entityMap.Attributes.FindByField(pkm.Field);
string idFieldAlias = pkm.ParentEntity.GetIdFieldAs(pkm);
foreach (string alias in _AliasColumnMapping.Keys)
{
if (alias.Contains(".") && attribute != null)
{
if (alias.Split('.')[1] == attribute.Name)
{
orderCol = new OrderByClauseColumn(_AliasColumnMapping[alias].ToString());
break;
}
}
else if (alias == idFieldAlias)
{
orderCol = new OrderByClauseColumn(_AliasColumnMapping[alias].ToString());
break;
}
}
if (orderCol == null)
orderCol = new OrderByClauseColumn(em.GetIdFieldAs(pkm));
}
if (orderCol != null)
sqlQuery.OrderByClause.Add(orderCol);
}
}
}
return sqlQuery;
}
public override void Visit(UnionStatement unionStatement)
{
if (unionStatement.OrderByClause != null && unionStatement.OrderByClause.Count > 0)
_Query.Append(SELECT).Append(MULT).Append(FROM).Append(OPENBRACE);
foreach (SelectStatement query in unionStatement.SelectExpressions)
{
query.Accept(this);
if (unionStatement.SelectExpressions.IndexOf(query) != unionStatement.SelectExpressions.Count - 1)
_Query.Append(UNIONALL);
}
if (unionStatement.OrderByClause != null && unionStatement.OrderByClause.Count > 0)
_Query.Append(CLOSEBRACE);
if (unionStatement.OrderByClause != null)
unionStatement.OrderByClause.Accept(this);
}
public virtual void Visit(UnionStatement unionStatement)
{
foreach(SelectStatement query in unionStatement.SelectExpressions)
{
query.Accept(this);
if (unionStatement.SelectExpressions.IndexOf(query) != unionStatement.SelectExpressions.Count - 1)
_Query.Append(UNIONALL);
}
if( unionStatement.OrderByClause != null)
unionStatement.OrderByClause.Accept(this);
}