public void Process(DeleteEntityCommand c)
{
EntityMapping deleteEntityMapping = _Mapping.Entities[c.Type, true];
Hashtable cmds = new Hashtable();
foreach (ReferenceMapping refm in deleteEntityMapping.References)
{
Evaluant.Uss.Models.Reference reference = _Engine.Model.GetReference(c.Type, refm.Name);
EntityMapping entityChildMapping = _Mapping.Entities[refm.EntityChild];
if (!reference.ToMany)
continue;
foreach (RuleMapping rulem in refm.Rules)
{
if (rulem.ParentTable == deleteEntityMapping.Table)
{
// update child table
SQLCommand cmd = (SQLCommand)cmds[rulem.ChildTable];
EntityMapping childEntity = _Mapping.Entities[refm.EntityChild];
if (!reference.IsComposition && rulem.ChildTable == childEntity.Table)
{
if (cmd == null)
{
cmd = new UpdateCommand(rulem, rulem.ChildTable);
cmds.Add(rulem.ChildTable, cmd);
}
}
else
{
if (cmd == null)
{
cmd = new DeleteCommand(rulem, rulem.ChildTable);
cmds.Add(rulem.ChildTable, cmd);
}
}
//if (cmd is DeleteCommand)
// continue;
for (int i = 0; i < rulem.ParentFields.Length; i++)
{
DbType dbType;
if (deleteEntityMapping.IdFields.Contains(refm.Rules[0].ParentFields[i]))
{
dbType = _Dialect.GetDbTypeToPrimaryKey(deleteEntityMapping.Ids[refm.Rules[0].ParentFields[i]].Generator);
}
else
{
dbType = _Dialect.GetDbTypeToPrimaryKey(childEntity.Ids[refm.Rules[0].ChildFields[i]].Generator);
}
Constant newValue;
if (rulem.ParentDefaultValues.Length > i && !string.IsNullOrEmpty(rulem.ParentDefaultValues[i]))
newValue = new Constant(rulem.ParentDefaultValues[i], dbType);
else
newValue = new Constant(DBNull.Value, dbType);
// SSX 28/01/08: add contains test
if (entityChildMapping.Ids[rulem.ChildFields[i]] == null && cmd is UpdateCommand
&& !((UpdateCommand)cmd).ColumnValueCollection.Contains(rulem.ChildFields[i]))
((UpdateCommand)cmd).ColumnValueCollection.Add(rulem.ChildFields[i], newValue);
Column childField = new Column(rulem, rulem.ChildFields[i]);
Constant childParameter = new Constant(ConvertId(deleteEntityMapping, rulem.ParentFields[i], c.ParentId), dbType);
BinaryLogicExpression parentClause = new BinaryLogicExpression(childField, BinaryLogicOperator.Equals, childParameter);
if (cmd is UpdateCommand)
((UpdateCommand)cmd).WhereClause.SearchCondition.Add(parentClause);
else
((DeleteCommand)cmd).Condition.SearchCondition.Add(parentClause);
}
if (!string.IsNullOrEmpty(rulem.Constraint))
DisableForeignKeys(rulem.ChildTable);
}
}
}
// Deletes all references to and from it first
foreach (EntityMapping em in _Mapping.Entities)
{
foreach (ReferenceMapping refm in em.References)
{
//Evaluant.Uss.Models.Model childModel = _Engine.Model.GetEntity(
if (refm.EntityChild == deleteEntityMapping.Type) // To
{
for (int indexRule = 0; indexRule < refm.Rules.Count; indexRule++)
{
RuleMapping rulem = refm.Rules[indexRule];
if ((rulem.ChildField == deleteEntityMapping.IdFields &&
deleteEntityMapping.DiscriminatorField == null) ||
(rulem.ChildField + ";" + deleteEntityMapping.DiscriminatorField == deleteEntityMapping.IdFields &&
deleteEntityMapping.DiscriminatorField != null))
{
// delete childtable
if (cmds.ContainsKey(rulem.ChildTable))
continue;
DeleteCommand cmd = new DeleteCommand(rulem, rulem.ChildTable);
cmds.Add(rulem.ChildTable, cmd);
for (int index = 0; index < rulem.ChildFields.Length; index++)
{
DbType dbType = _Dialect.GetDbTypeToPrimaryKey(deleteEntityMapping.Ids[index].Generator);
cmd.Condition.SearchCondition.Add(new BinaryLogicExpression(
new Column(rulem, rulem.ChildFields[index]),
BinaryLogicOperator.Equals,
new Constant(ConvertId(deleteEntityMapping, rulem.ChildFields[index], c.ParentId), dbType)
));
}
if (!string.IsNullOrEmpty(refm.DiscriminatorField) && indexRule == refm.Rules.Count - 1)
{
cmd.Condition.SearchCondition.Add(new BinaryLogicExpression(
new Column(rulem, refm.DiscriminatorField),
BinaryLogicOperator.Equals,
new Parameter(rulem, refm.DiscriminatorValue)
));
}
if (!string.IsNullOrEmpty(rulem.Constraint))
DisableForeignKeys(rulem.ChildTable);
}
if (rulem.ParentField != em.IdFields && em.DiscriminatorField != null
|| rulem.ParentTable != em.Table)
{
// update parent table
SQLCommand cmd = (SQLCommand)cmds[rulem.ParentTable];
if (cmd == null)
{
cmd = new UpdateCommand(rulem, rulem.ParentTable);
cmds.Add(rulem.ParentTable, cmd);
}
if (cmd is DeleteCommand)
continue;
for (int i = 0; i < rulem.ParentFields.Length; i++)
{
DbType dbType = _Dialect.GetDbTypeToPrimaryKey(deleteEntityMapping.Ids[i].Generator);
Constant newValue = new Constant(DBNull.Value, dbType);
if (rulem.ParentDefaultValues.Length > i && !string.IsNullOrEmpty(rulem.ParentDefaultValues[i]))
newValue = new Constant(rulem.ParentDefaultValues[i], dbType);
// SSX 28/01/08: add contains test
if (em.Ids[rulem.ParentFields[i]] == null
&& !((UpdateCommand)cmd).ColumnValueCollection.Contains(rulem.ParentFields[i]))
((UpdateCommand)cmd).ColumnValueCollection.Add(rulem.ParentFields[i], newValue);
Column parentField = new Column(rulem, rulem.ParentFields[i]);
Constant parentParameter = new Constant(ConvertId(deleteEntityMapping, rulem.ParentFields[i], c.ParentId), dbType);
BinaryLogicExpression parentClause = new BinaryLogicExpression(parentField, BinaryLogicOperator.Equals, parentParameter);
((UpdateCommand)cmd).WhereClause.SearchCondition.Add(parentClause);
}
// UPDATE parentTable SET parentField = NULL WHERE (parentField = @parentValue AND discriminator = 'name's relation')
if (!string.IsNullOrEmpty(refm.DiscriminatorField) && indexRule == refm.Rules.Count - 1)
{
Column discriminatorField = new Column(rulem, rulem.ParentField);
Constant discriminatorValue = new Constant(refm.DiscriminatorValue, DbType.AnsiString);
BinaryLogicExpression discriminatorClause = new BinaryLogicExpression(discriminatorField, BinaryLogicOperator.Equals, discriminatorValue);
((UpdateCommand)cmd).WhereClause.SearchCondition.Add(discriminatorClause);
}
if (!string.IsNullOrEmpty(rulem.Constraint))
DisableForeignKeys(rulem.ParentTable);
}
}
}
}
}
// Deletes all attributes if they are in a separate table
if (deleteEntityMapping.Attributes != null)
{
foreach (AttributeMapping am in deleteEntityMapping.Attributes)
{
if (am.Table != deleteEntityMapping.Table)
{
DeleteCommand cmd = new DeleteCommand(am, am.Table);
for (int index = 0; index < deleteEntityMapping.Ids.Count; index++)
{
PrimaryKeyMapping pkm = deleteEntityMapping.Ids[index];
cmd.Condition.SearchCondition.Add(new BinaryLogicExpression(
new Column(am, am.ParentFields[index]),
BinaryLogicOperator.Equals,
new Constant(ConvertId(deleteEntityMapping, pkm.Field, c.ParentId), _Dialect.GetDbTypeToPrimaryKey(pkm.Generator))));
}
cmds.Add(am.Table, cmd);
}
}
}
// SSX 28/01/08: remove table if already existing
if (cmds.Contains(deleteEntityMapping.Table))
{
cmds.Remove(deleteEntityMapping.Table);
}
if (!cmds.ContainsKey(deleteEntityMapping.Table))
{
DeleteCommand cmd = new DeleteCommand(deleteEntityMapping, deleteEntityMapping.Table);
for (int index = 0; index < deleteEntityMapping.Ids.Count; index++)
{
PrimaryKeyMapping pkm = deleteEntityMapping.Ids[index];
cmd.Condition.SearchCondition.Add(new BinaryLogicExpression(
new Column(deleteEntityMapping, pkm.Field),
BinaryLogicOperator.Equals,
new Constant(ConvertId(deleteEntityMapping, pkm.Field, c.ParentId), _Dialect.GetDbTypeToPrimaryKey(pkm.Generator))));
}
cmds.Add(deleteEntityMapping.Table, cmd);
}
foreach (string tableName in cmds.Keys)
{
foreach (string query in _Dialect.RenderQueries((ISQLExpression)cmds[tableName]))
{
if (!string.IsNullOrEmpty(query))
{
IDbCommand cmd = _Driver.CreateCommand(query, _Connection, _Transaction);
if (_Engine.TraceSqlSwitch.Enabled)
TraceHelpler.Trace(cmd, _Dialect);
cmd.ExecuteNonQuery();
}
}
}
}
/// <summary>
/// Processes the attributes.
/// </summary>
/// <param name="entityMap">Entity mapping whitch contains the attribute</param>
/// <param name="name">Name of the attribute</param>
/// <param name="loadAttributes"></param>
/// <param name="checkAlias">Indicate if returned column must have an computed alias name or not</param>
/// <returns>Return a <see cref="Column"/></returns>
public ISQLExpression ProcessAttributes(EntityMapping entityMap, string name, bool loadAttributes, bool checkAlias)
{
if (name == "Id")
{
Table currentTable = (Table)tableContext.Peek();
return new Column(entityMap.Ids[0], currentTable.TableAlias, entityMap.GetIdField(entityMap.Ids[0]));
}
else
{
// Exception management : attribute mapping
AttributeMapping attributeMapping = entityMap.Attributes[name];
//Attempt to get the attribute in the children types
if (attributeMapping == null)
foreach (Evaluant.Uss.Models.Entity e in _Model.GetTree(entityMap.Type))
{
EntityMapping em = _Mapping.Entities[e.Type];
if ((attributeMapping = em.Attributes[name]) != null)
break;
}
//Attempt to get the attribute in the parent types
if (attributeMapping == null)
{
Evaluant.Uss.Models.Entity cur = _Model.GetEntity(entityMap.Type);
while (_Model.GetParent(cur) != null)
{
cur = _Model.GetParent(cur);
EntityMapping current = _Mapping.Entities[cur.Type];
if (current.Attributes[name] != null)
attributeMapping = current.Attributes[name];
}
}
if (attributeMapping == null)
throw new UniversalStorageException(String.Format("The attribute '{0}' of the entity '{1}' is not defined in your mapping file", name, entityMap.Type));
// If the attribute is contained in entity's table : the current query doesn't change
if (attributeMapping.Table == entityMap.Table)
{
Table currentTable = (Table)tableContext.Peek();
Column c = new Column(attributeMapping, currentTable.TableAlias, attributeMapping.Field);
//if (entityMap.Ids[attributeMapping.Field] != null)
// c.ColumnName = entityMap.GetIdField(entityMap.Ids[attributeMapping.Field]);
if (checkAlias)
{
string attributeFullName = _Model.GetFullAttributeName(attributeMapping.Name, attributeMapping.ParentEntity.Type);
//if (entityMap.Ids[attributeMapping.Field] != null)
// attributeFullName = entityMap.GetIdFieldAs(entityMap.Ids[attributeMapping.Field]);
//c.ColumnName = (_AliasColumnMapping.Contains(attributeFullName)) ? _AliasColumnMapping[attributeFullName].ToString() : "";
if (_AliasColumnMapping.Contains(attributeFullName))
c.ColumnName = _AliasColumnMapping[attributeFullName].ToString();
}
return c;
}
// Else : create a new select query
else
{
// Get the current context
Table currentTable = (Table)tableContext.Pop();
SelectStatement mainQuery = (SelectStatement)queryContext.Pop();
// Create a new query
SelectStatement currentQuery = new SelectStatement(attributeMapping);
Table attributeTable = new TableSource(attributeMapping, attributeMapping.Table, CreateUniqueAttributeAlias());
string atrbId = attributeMapping.Table == null || attributeMapping.Table == entityMap.Table ? entityMap.GetIdField(entityMap.Ids[0]) : attributeMapping.ParentField;
if (loadAttributes)
{
return this.ProcessAttributesWithLoadAttribute(mainQuery, currentQuery, currentTable, entityMap, attributeTable, attributeMapping, atrbId);
}
else
{
if (_IsFirstAttribute)
{
_IsFirstAttribute = false;
// if current table is a JoinedTable :
// from clause = mainQuery INNER JOIN attributeTable
if (currentTable.GetType() == typeof(JoinedTable))
{
JoinedTable lastJoinTable = new JoinedTable(mainQuery, loadAttributes ? TypeJoinedTable.LeftOuter : TypeJoinedTable.Inner, attributeTable);
lastJoinTable.TableAlias = mainQuery.TableAlias;
BinaryLogicExpression onCondition = new BinaryLogicExpression(
new Column(entityMap.Ids[0], mainQuery.TableAlias, entityMap.GetIdField(entityMap.Ids[0])),
BinaryLogicOperator.Equals,
new Column(attributeMapping, attributeTable.TableAlias, atrbId));
if (mainQuery.WhereClause.SearchCondition.Count != 0)
{
foreach (ILogicExpression expression in mainQuery.WhereClause.SearchCondition)
{
onCondition = new BinaryLogicExpression(onCondition, BinaryLogicOperator.And, expression);
}
}
lastJoinTable.SearchConditions.Add(new BinaryLogicExpression(
new Column(entityMap.Ids[0], mainQuery.TableAlias, entityMap.GetIdField(entityMap.Ids[0])),
BinaryLogicOperator.Equals,
new Column(entityMap.Ids[0], attributeTable.TableAlias, atrbId)));
currentQuery.TableAlias = mainQuery.TableAlias;
currentQuery.FromClause.Add(lastJoinTable);
currentQuery.WhereClause.SearchCondition.Add(new BinaryLogicExpression(
new Column(attributeMapping, attributeTable.TableAlias, attributeMapping.Discriminator),
BinaryLogicOperator.Equals,
new Constant(name, DbType.AnsiString)));
tableContext.Push(lastJoinTable);
queryContext.Push(currentQuery);
return new Column(attributeMapping, attributeTable.TableAlias, attributeMapping.Field);
}
// else
// from clause = currentTable INNER JOIN attributeTable
else
{
JoinedTable joinTable = new JoinedTable(currentTable, loadAttributes ? TypeJoinedTable.LeftOuter : TypeJoinedTable.Inner, attributeTable);
joinTable.SearchConditions.Add(new BinaryLogicExpression(
new Column(entityMap.Ids[0], currentTable.TableAlias, entityMap.GetIdField(entityMap.Ids[0])),
BinaryLogicOperator.Equals,
new Column(attributeMapping, attributeTable.TableAlias, atrbId)));
currentQuery.TableAlias = CreateUniqueTableAlias();
currentQuery.FromClause.Add(joinTable);
currentQuery.WhereClause.SearchCondition = mainQuery.WhereClause.SearchCondition;
tableContext.Push(joinTable);
}
}
else
{
Table rightTable = ((JoinedTable)currentTable).RigthTable;
JoinedTable joinTable = new JoinedTable(attributeTable, TypeJoinedTable.Inner, rightTable);
joinTable.SearchConditions.Add(new BinaryLogicExpression(
new Column(attributeMapping, rightTable.TableAlias, atrbId),
BinaryLogicOperator.Equals,
new Column(attributeMapping, attributeTable.TableAlias, atrbId)));
((JoinedTable)currentTable).RigthTable = joinTable;
currentQuery.SelectList.Add(new Column(entityMap.Ids[0], currentTable.TableAlias, entityMap.GetIdField(entityMap.Ids[0])));
currentQuery.TableAlias = currentTable.TableAlias;
currentQuery.FromClause.Add(currentTable);
tableContext.Push(currentTable);
}
queryContext.Push(currentQuery);
return new Column(attributeMapping, attributeTable.TableAlias, attributeMapping.Field);
}
}
}
}
private ISQLExpression ProcessAttributesWithLoadAttribute(SelectStatement mainQuery, SelectStatement currentQuery, Table currentTable, EntityMapping entityMap, Table attributeTable, AttributeMapping attributeMapping, string atrbId)
{
if (_IsFirstAttribute)
{
_IsFirstAttribute = false;
// if current table is a JoinedTable :
// from clause = mainQuery INNER JOIN attributeTable
if (currentTable is JoinedTable)
{
JoinedTable lastJoinTable = new JoinedTable(mainQuery, TypeJoinedTable.LeftOuter, attributeTable);
lastJoinTable.TableAlias = mainQuery.TableAlias;
BinaryLogicExpression onCondition = new BinaryLogicExpression(
new Column(entityMap.Ids[0], mainQuery.TableAlias, entityMap.GetIdField(entityMap.Ids[0])),
BinaryLogicOperator.Equals,
new Column(attributeMapping, attributeTable.TableAlias, atrbId));
if (mainQuery.WhereClause.SearchCondition.Count != 0)
{
foreach (ILogicExpression expression in mainQuery.WhereClause.SearchCondition)
{
onCondition = new BinaryLogicExpression(onCondition, BinaryLogicOperator.And, expression);
}
}
lastJoinTable.SearchConditions.Add(new BinaryLogicExpression(
new Column(entityMap.Ids[0], mainQuery.TableAlias, entityMap.GetIdField(entityMap.Ids[0])),
BinaryLogicOperator.Equals,
new Column(entityMap.Ids[0], attributeTable.TableAlias, atrbId)));
currentQuery.TableAlias = mainQuery.TableAlias;
currentQuery.FromClause.Add(lastJoinTable);
tableContext.Push(lastJoinTable);
for (int i = 0; i < 2; i++)
{
Column column = mainQuery.SelectList[i] as Column;
if (column != null && column.ColumnName == entityMap.Ids[0].Field && entityMap.Ids[0].Generator.Name == GeneratorMapping.GeneratorType.inherited)
{
column.Alias = null;
currentQuery.SelectList.Add(new Column(column.TagMapping, lastJoinTable.TableAlias, column.ColumnName, entityMap.GetIdFieldAs(entityMap.Ids[0])));
}
else
{
currentQuery.SelectList.Add(mainQuery.SelectList[i]);
}
}
if (entityMap.Ids[0].Generator.Name == GeneratorMapping.GeneratorType.inherited)
{
for (int i = 2; i < mainQuery.SelectList.Count; i++)
{
Column column = mainQuery.SelectList[i] as Column;
if (column != null)
{
currentQuery.SelectList.Add(new Column(column.TagMapping, lastJoinTable.TableAlias, column.GetSelectName()));
}
}
}
if (attributeMapping.Discriminator != null)
{
currentQuery.SelectList.Add(new Column(attributeMapping, attributeTable.TableAlias, attributeMapping.Discriminator));
}
queryContext.Push(currentQuery);
string alias = (attributeMapping.Field != attributeMapping.Name) ? attributeMapping.Name : String.Empty;
return new Column(attributeMapping, attributeTable.TableAlias, attributeMapping.Field);
}
// else
// from clause = currentTable INNER JOIN attributeTable
else
{
JoinedTable joinTable = new JoinedTable(currentTable, TypeJoinedTable.LeftOuter, attributeTable);
joinTable.SearchConditions.Add(new BinaryLogicExpression(
new Column(entityMap.Ids[0], currentTable.TableAlias, entityMap.GetIdField(entityMap.Ids[0])),
BinaryLogicOperator.Equals,
new Column(attributeMapping, attributeTable.TableAlias, atrbId)));
currentQuery.TableAlias = currentTable.TableAlias;
currentQuery.FromClause.Add(joinTable);
currentQuery.WhereClause.SearchCondition = mainQuery.WhereClause.SearchCondition;
foreach (ISQLExpression exp in mainQuery.SelectList)
{
if (!currentQuery.SelectList.Contains(exp))
currentQuery.SelectList.Add(exp);
}
tableContext.Push(joinTable);
}
}
else
{
Table rightTable = ((JoinedTable)currentTable).RigthTable;
JoinedTable joinTable = new JoinedTable(rightTable, TypeJoinedTable.LeftOuter, attributeTable);
joinTable.SearchConditions.Add(new BinaryLogicExpression(
new Column(attributeMapping, rightTable.TableAlias, atrbId),
BinaryLogicOperator.Equals,
new Column(attributeMapping, attributeTable.TableAlias, atrbId)));
((JoinedTable)currentTable).RigthTable = joinTable;
currentQuery.TableAlias = currentTable.TableAlias;
currentQuery.FromClause.Add(currentTable);
currentQuery.WhereClause.SearchCondition = mainQuery.WhereClause.SearchCondition;
tableContext.Push(currentTable);
}
foreach (ISQLExpression exp in mainQuery.SelectList)
{
if (!currentQuery.SelectList.Contains(exp))
{
currentQuery.SelectList.Add(exp);
}
}
if (attributeMapping.Discriminator != null)
{
currentQuery.SelectList.Add(new Column(attributeMapping, attributeTable.TableAlias, attributeMapping.Discriminator));
}
queryContext.Push(currentQuery);
string alias1 = (attributeMapping.Field != attributeMapping.Name) ? attributeMapping.Name : String.Empty;
return new Column(attributeMapping, attributeTable.TableAlias, attributeMapping.Field, alias1);
}
public override void Visit(BinaryOperator binaryop)
{
bool firstIsType = ((int)_ExprLevel.Peek() == EXPR);
_ExprLevel.Push(_ExprLevel.Peek());
ISQLExpression expression = null;
EntityMapping entityMap = null;
if (!firstIsType)
entityMap = (EntityMapping)entityMappingContext.Peek();
// Try to get the queried attribute. If it is a date type and the
// corresponding mapping is generic, we have to convert the value as ticks
// instead of the standard representation
Value val = binaryop.LeftOperand as Value;
Path path = binaryop.LeftOperand as Path;
if (val == null)
val = binaryop.RightOperand as Value;
if (path == null)
path = binaryop.RightOperand as Path;
if (!firstIsType)
{
if (val != null && path != null && path.Identifiers.Count == 1)
{
AttributeMapping am = entityMap.Attributes[path.Identifiers[path.Identifiers.Count - 1].Value, true];
if (val.Type == ValueEnum.Date)
{
// If the field type isn't date type, convert the value as ticks
if (am.DbType != DbType.Date && am.DbType != DbType.DateTime && am.DbType != DbType.Time)
{
DateTime dt = Convert.ToDateTime(val.Text);
val.Text = Common.Utils.ConvertToString(dt, dt.GetType());
}
}
}
}
ISQLExpression discriminatorConstraint = null;
Path p = binaryop.LeftOperand as Path;
if (p == null)
p = binaryop.RightOperand as Path;
if (p != null && !firstIsType)
{
AttributeMapping am = entityMap.Attributes[p.Identifiers[p.Identifiers.Count - 1].Value];
if (am != null &&
am.Discriminator != null &&
am.Discriminator != string.Empty &&
am.DiscriminatorValue != null &&
am.DiscriminatorValue != string.Empty)
{
Column left = new Column(am, am.Discriminator);
Constant right = new Constant(path.Identifiers[path.Identifiers.Count - 1].Value, DbType.AnsiStringFixedLength);
discriminatorConstraint = new BinaryLogicExpression(
left,
BinaryLogicOperator.Equals,
right);
}
}
switch (binaryop.Type)
{
case BinaryOperatorEnum.And:
binaryop.LeftOperand.Accept(this);
ISQLExpression leftValueExpression = (ISQLExpression)sqlExpressionContext.Pop();
binaryop.RightOperand.Accept(this);
ISQLExpression rightValueExpression = (ISQLExpression)sqlExpressionContext.Pop();
expression = new BinaryLogicExpression(leftValueExpression, BinaryLogicOperator.And, rightValueExpression);
if (discriminatorConstraint != null)
expression = new BinaryLogicExpression(
expression,
BinaryLogicOperator.And,
discriminatorConstraint);
sqlExpressionContext.Push(expression);
break;
case BinaryOperatorEnum.Or:
binaryop.LeftOperand.Accept(this);
leftValueExpression = (ISQLExpression)sqlExpressionContext.Pop();
binaryop.RightOperand.Accept(this);
rightValueExpression = (ISQLExpression)sqlExpressionContext.Pop();
expression = new BinaryLogicExpression(leftValueExpression, BinaryLogicOperator.Or, rightValueExpression);
if (discriminatorConstraint != null)
expression = new BinaryLogicExpression(
expression,
BinaryLogicOperator.And,
discriminatorConstraint);
sqlExpressionContext.Push(expression);
break;
case BinaryOperatorEnum.Equal:
binaryop.LeftOperand.Accept(this);
leftValueExpression = (ISQLExpression)sqlExpressionContext.Pop();
binaryop.RightOperand.Accept(this);
rightValueExpression = (ISQLExpression)sqlExpressionContext.Pop();
expression = new BinaryLogicExpression(leftValueExpression, BinaryLogicOperator.Equals, rightValueExpression);
if (discriminatorConstraint != null)
expression = new BinaryLogicExpression(
expression,
BinaryLogicOperator.And,
discriminatorConstraint);
sqlExpressionContext.Push(expression);
break;
case BinaryOperatorEnum.Greater:
binaryop.LeftOperand.Accept(this);
leftValueExpression = (ISQLExpression)sqlExpressionContext.Pop();
binaryop.RightOperand.Accept(this);
rightValueExpression = (ISQLExpression)sqlExpressionContext.Pop();
expression = new BinaryLogicExpression(leftValueExpression, BinaryLogicOperator.Greater, rightValueExpression);
if (discriminatorConstraint != null)
expression = new BinaryLogicExpression(
expression,
BinaryLogicOperator.And,
discriminatorConstraint);
sqlExpressionContext.Push(expression);
break;
case BinaryOperatorEnum.GreaterOrEqual:
binaryop.LeftOperand.Accept(this);
leftValueExpression = (ISQLExpression)sqlExpressionContext.Pop();
binaryop.RightOperand.Accept(this);
rightValueExpression = (ISQLExpression)sqlExpressionContext.Pop();
expression = new BinaryLogicExpression(leftValueExpression, BinaryLogicOperator.GreaterOrEquals, rightValueExpression);
if (discriminatorConstraint != null)
expression = new BinaryLogicExpression(
expression,
BinaryLogicOperator.And,
discriminatorConstraint);
sqlExpressionContext.Push(expression);
break;
case BinaryOperatorEnum.Lesser:
binaryop.LeftOperand.Accept(this);
leftValueExpression = (ISQLExpression)sqlExpressionContext.Pop();
binaryop.RightOperand.Accept(this);
rightValueExpression = (ISQLExpression)sqlExpressionContext.Pop();
expression = new BinaryLogicExpression(leftValueExpression, BinaryLogicOperator.Lesser, rightValueExpression);
if (discriminatorConstraint != null)
expression = new BinaryLogicExpression(
expression,
BinaryLogicOperator.And,
discriminatorConstraint);
sqlExpressionContext.Push(expression);
break;
case BinaryOperatorEnum.LesserOrEqual:
binaryop.LeftOperand.Accept(this);
leftValueExpression = (ISQLExpression)sqlExpressionContext.Pop();
binaryop.RightOperand.Accept(this);
rightValueExpression = (ISQLExpression)sqlExpressionContext.Pop();
expression = new BinaryLogicExpression(leftValueExpression, BinaryLogicOperator.LesserOrEquals, rightValueExpression);
if (discriminatorConstraint != null)
expression = new BinaryLogicExpression(
expression,
BinaryLogicOperator.And,
discriminatorConstraint);
sqlExpressionContext.Push(expression);
break;
case BinaryOperatorEnum.NotEqual:
binaryop.LeftOperand.Accept(this);
leftValueExpression = (ISQLExpression)sqlExpressionContext.Pop();
binaryop.RightOperand.Accept(this);
rightValueExpression = (ISQLExpression)sqlExpressionContext.Pop();
expression = new BinaryLogicExpression(leftValueExpression, BinaryLogicOperator.NotEquals, rightValueExpression);
if (discriminatorConstraint != null)
expression = new BinaryLogicExpression(
expression,
BinaryLogicOperator.And,
discriminatorConstraint);
sqlExpressionContext.Push(expression);
break;
case BinaryOperatorEnum.Plus:
case BinaryOperatorEnum.Times:
case BinaryOperatorEnum.Div:
case BinaryOperatorEnum.Minus:
case BinaryOperatorEnum.Modulo:
binaryop.LeftOperand.Accept(this);
leftValueExpression = (ISQLExpression)sqlExpressionContext.Pop();
binaryop.RightOperand.Accept(this);
rightValueExpression = (ISQLExpression)sqlExpressionContext.Pop();
expression = new BinaryLogicExpression(leftValueExpression, BinaryOperatorToBinaryLogicOperator(binaryop.Type), rightValueExpression);
if (discriminatorConstraint != null)
expression = new BinaryLogicExpression(expression, BinaryLogicOperator.And, discriminatorConstraint);
sqlExpressionContext.Push(expression);
break;
case BinaryOperatorEnum.Contains:
binaryop.LeftOperand.Accept(this);
leftValueExpression = (ISQLExpression)sqlExpressionContext.Pop();
binaryop.RightOperand.Accept(this);
rightValueExpression = (ISQLExpression)sqlExpressionContext.Pop();
expression = new LikePredicate(leftValueExpression, String.Format("%{0}%", (string)((Constant)rightValueExpression).Value));
if (discriminatorConstraint != null)
expression = new BinaryLogicExpression(
expression,
BinaryLogicOperator.And,
discriminatorConstraint);
sqlExpressionContext.Push(expression);
break;
case BinaryOperatorEnum.BeginsWith:
binaryop.LeftOperand.Accept(this);
leftValueExpression = (ISQLExpression)sqlExpressionContext.Pop();
binaryop.RightOperand.Accept(this);
rightValueExpression = (ISQLExpression)sqlExpressionContext.Pop();
expression = new LikePredicate(leftValueExpression, String.Format("{0}%", (string)((Constant)rightValueExpression).Value));
if (discriminatorConstraint != null)
expression = new BinaryLogicExpression(
expression,
BinaryLogicOperator.And,
discriminatorConstraint);
sqlExpressionContext.Push(expression);
break;
case BinaryOperatorEnum.EndsWith:
binaryop.LeftOperand.Accept(this);
leftValueExpression = (ISQLExpression)sqlExpressionContext.Pop();
binaryop.RightOperand.Accept(this);
rightValueExpression = (ISQLExpression)sqlExpressionContext.Pop();
expression = new LikePredicate(leftValueExpression, String.Format("%{0}", (string)((Constant)rightValueExpression).Value));
if (discriminatorConstraint != null)
expression = new BinaryLogicExpression(
expression,
BinaryLogicOperator.And,
discriminatorConstraint);
sqlExpressionContext.Push(expression);
break;
}
_ExprLevel.Pop();
}
/// <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 virtual void Visit(BinaryLogicExpression expression)
{
bool BinaryIsFirst = _Query.Length == SELECT.Length;
_Query.Append(OPENBRACE);
if (IsSelectStatement(expression.LeftOperand))
_Query.Append(OPENBRACE);
expression.LeftOperand.Accept(this);
if (IsSelectStatement(expression.LeftOperand))
_Query.Append(CLOSEBRACE);
Visit(expression.Operator);
if (IsSelectStatement(expression.RightOperand))
_Query.Append(OPENBRACE);
expression.RightOperand.Accept(this);
if (IsSelectStatement(expression.RightOperand))
_Query.Append(CLOSEBRACE);
_Query.Append(CLOSEBRACE);
if (BinaryIsFirst)
_Query.Append(GetDummyTableForScalarResults);
}
