public AssociatedTableContext(ExpressionParser parser, TableContext parent, Association association)
: base(parser, parent.SqlQuery)
{
var type = TypeHelper.GetMemberType(association.MemberAccessor.MemberInfo);
var left = association.CanBeNull;
var isList = false;
if (TypeHelper.IsSameOrParent(typeof(IEnumerable), type))
{
var etypes = TypeHelper.GetGenericArguments(type, typeof(IEnumerable));
type = etypes != null && etypes.Length > 0 ? etypes[0] : TypeHelper.GetListItemType(type);
isList = true;
}
OriginalType = type;
ObjectType = GetObjectType();
ObjectMapper = Parser.MappingSchema.GetObjectMapper(ObjectType);
SqlTable = new SqlTable(parser.MappingSchema, ObjectType);
var psrc = parent.SqlQuery.From[parent.SqlTable];
var join = left ? SqlTable.WeakLeftJoin() : isList?SqlTable.InnerJoin() : SqlTable.WeakInnerJoin();
_parentAssociation = parent;
ParentAssociationJoin = join.JoinedTable;
psrc.Joins.Add(join.JoinedTable);
//Init(mappingSchema);
for (var i = 0; i < association.ThisKey.Length; i++)
{
SqlField field1;
SqlField field2;
if (!parent.SqlTable.Fields.TryGetValue(association.ThisKey[i], out field1))
{
throw new LinqException("Association key '{0}' not found for type '{1}.", association.ThisKey[i], parent.ObjectType);
}
if (!SqlTable.Fields.TryGetValue(association.OtherKey[i], out field2))
{
throw new LinqException("Association key '{0}' not found for type '{1}.", association.OtherKey[i], ObjectType);
}
join.Field(field1).Equal.Field(field2);
}
}
Table(MappingSchema mappingSchema, SqlQuery sqlQuery, Association association, Table parent)
: base(sqlQuery, null)
{
var type = TypeHelper.GetMemberType(association.MemberAccessor.MemberInfo);
var left = association.CanBeNull;
var isList = false;
if (TypeHelper.IsSameOrParent(typeof(IEnumerable), type))
{
var etypes = TypeHelper.GetGenericArguments(type, typeof(IEnumerable));
type = etypes != null && etypes.Length > 0 ? etypes[0] : TypeHelper.GetListItemType(type);
isList = true;
}
OriginalType = type;
_objectType = GetObjectType(OriginalType, mappingSchema);
SqlTable = new SqlTable(mappingSchema, ObjectType);
var psrc = sqlQuery.From[parent.SqlTable];
var join = left ? SqlTable.WeakLeftJoin() : isList?SqlTable.InnerJoin() : SqlTable.WeakInnerJoin();
_parentAssociation = parent;
_parentAssociationJoin = join.JoinedTable;
psrc.Joins.Add(join.JoinedTable);
Init(mappingSchema);
for (var i = 0; i < association.ThisKey.Length; i++)
{
Column col1, col2;
if (!parent._columns.TryGetValue(association.ThisKey[i], out col1))
{
throw new LinqException("Association key '{0}' not found for type '{1}.", association.ThisKey[i], parent.ObjectType);
}
if (!_columns.TryGetValue(association.OtherKey[i], out col2))
{
throw new LinqException("Association key '{0}' not found for type '{1}.", association.OtherKey[i], ObjectType);
}
join.Field(col1.Field).Equal.Field(col2.Field);
}
ParsingTracer.DecIndentLevel();
}
public AssociatedTableContext(ExpressionBuilder builder, TableContext parent, AssociationDescriptor association)
: base(builder, parent.SelectQuery)
{
var type = association.MemberInfo.GetMemberType();
var left = association.CanBeNull;
if (typeof(IEnumerable).IsSameOrParentOf(type))
{
var etypes = type.GetGenericArguments(typeof(IEnumerable <>));
type = etypes != null && etypes.Length > 0 ? etypes[0] : type.GetListItemType();
IsList = true;
}
OriginalType = type;
ObjectType = GetObjectType();
EntityDescriptor = Builder.MappingSchema.GetEntityDescriptor(ObjectType);
SqlTable = new SqlTable(builder.MappingSchema, ObjectType);
var psrc = parent.SelectQuery.From[parent.SqlTable];
var join = left ? SqlTable.WeakLeftJoin() : IsList?SqlTable.InnerJoin() : SqlTable.WeakInnerJoin();
Association = association;
ParentAssociation = parent;
ParentAssociationJoin = join.JoinedTable;
psrc.Joins.Add(join.JoinedTable);
for (var i = 0; i < association.ThisKey.Length; i++)
{
SqlField field1;
SqlField field2;
if (!parent.SqlTable.Fields.TryGetValue(association.ThisKey[i], out field1))
{
throw new LinqException("Association key '{0}' not found for type '{1}.", association.ThisKey[i], parent.ObjectType);
}
if (!SqlTable.Fields.TryGetValue(association.OtherKey[i], out field2))
{
throw new LinqException("Association key '{0}' not found for type '{1}.", association.OtherKey[i], ObjectType);
}
join.Field(field1).Equal.Field(field2);
}
Init();
}
private SqlSelect BuildJoinQuery(IndexInfo index)
{
SqlTable resultTable = null;
SqlTable rootTable = null;
int keyColumnCount = index.KeyColumns.Count;
var underlyingQueries = index.UnderlyingIndexes.Select(BuildProviderQuery);
var sourceTables = index.UnderlyingIndexes.Any(i => i.IsVirtual)
? underlyingQueries.Select(SqlDml.QueryRef).Cast <SqlTable>().ToList()
: underlyingQueries.Select(q => {
var tableRef = (SqlTableRef)q.From;
return((SqlTable)SqlDml.TableRef(tableRef.DataTable, tableRef.Name, q.Columns.Select(c => c.Name)));
}).ToList();
foreach (var table in sourceTables)
{
if (resultTable == null)
{
resultTable = rootTable = table;
}
else
{
SqlExpression joinExpression = null;
for (int i = 0; i < keyColumnCount; i++)
{
var binary = (table.Columns[i] == rootTable.Columns[i]);
if (joinExpression.IsNullReference())
{
joinExpression = binary;
}
else
{
joinExpression &= binary;
}
}
resultTable = resultTable.InnerJoin(table, joinExpression);
}
}
var columns = new List <SqlColumn>();
foreach (var map in index.ValueColumnsMap)
{
var table = sourceTables[map.First];
if (columns.Count == 0)
{
var keyColumns = Enumerable
.Range(0, keyColumnCount)
.Select(i => table.Columns[i])
.Cast <SqlColumn>();
columns.AddRange(keyColumns);
}
var valueColumns = map.Second
.Select(columnIndex => table.Columns[columnIndex + keyColumnCount])
.Cast <SqlColumn>();
columns.AddRange(valueColumns);
}
var query = SqlDml.Select(resultTable);
query.Columns.AddRange(columns);
return(query);
}
