private void BuildReturning(Aliaser aliaser, DeleteStatement statement, IEnumerable <SchemaMember> schemas)
{
statement.Returning = new ReturningClause(TableDefinition.Temporary());
foreach (var key in statement.Entity.Key)
{
statement.Returning.Table.Field(key);
statement.Returning.Append(statement.Table.CreateField(key), ReturningClause.ReturningMode.Deleted);
}
var super = statement.Entity.GetBaseEntity();
while (super != null)
{
this.BuildInherit(aliaser, statement, super);
super = super.GetBaseEntity();
}
foreach (var schema in schemas)
{
if (schema.Token.Property.IsSimplex)
{
continue;
}
var complex = (IDataEntityComplexProperty)schema.Token.Property;
ISource src = complex.Entity == statement.Entity ?
statement.Table :
statement.Join(aliaser, statement.Table, complex.Entity);
foreach (var link in complex.Links)
{
var anchors = link.GetAnchors();
if (anchors.Length > 1)
{
continue;
}
ISource source = statement.Table;
foreach (var anchor in link.GetAnchors())
{
if (anchor.IsComplex)
{
source = statement.Join(aliaser, source, (IDataEntityComplexProperty)anchor);
}
else
{
//某些导航属性可能与主键相同，表定义的字段定义方法（TableDefinition.Field(...)）可避免同名字段的重复定义
if (statement.Returning.Table.Field((IDataEntitySimplexProperty)anchor) != null)
{
statement.Returning.Append(src.CreateField(anchor.Name), ReturningClause.ReturningMode.Deleted);
}
}
}
}
this.BuildSlave(aliaser, statement, schema);
}
}
public TableIdentifier(TableDefinition table, string alias = null)
{
this.Table = table ?? throw new ArgumentNullException(nameof(table));
this.Alias = alias;
this.Name = table.Name;
}