public FilterContext(DataFilter owner, Resultset source, Object filterPredicate, QueryContext queryContext, Object[] parameters)
: base(owner, source, queryContext, parameters)
{
_source = source;
_compiledBody = new FunctionLink();
List<ColumnBinding> bindings = new List<ColumnBinding>();
ExpressionTransformer transformer = new ExpressionTransformer(bindings);
foreach (RowType.TypeInfo ti in source.RowType.Fields)
foreach (RowType.TypeInfo nested_ti in ti.NestedType.Fields)
if (!nested_ti.IsHidden)
{
ColumnBinding b = new ColumnBinding();
b.typecode = Type.GetTypeCode(nested_ti.DataType);
b.rnum = ti.Ordinal;
b.TableName = ti.Name;
b.Name = nested_ti.Name;
b.fieldType = nested_ti;
b.natural = nested_ti.IsNatural;
b.container = nested_ti.IsContainer;
b.caseSensitive = nested_ti.IsCaseSensitive;
b.data = new SymbolLink(nested_ti.DataType);
bindings.Add(b);
if (nested_ti.IsContainer)
transformer.NeedTransform = true;
}
LispExecutive.Enter(_resolver = new DataResolver(new Binder(bindings)));
if (transformer.NeedTransform)
_filterPredicate = transformer.Process(filterPredicate);
else
_filterPredicate = filterPredicate;
}
public SelectorContext(DataSelector owner, bool distinct, Column[] columns, DataResolver resolver,
Resultset source, QueryContext queryContext, object[] parameters, FunctionLink[] compiledBody)
: base(owner, source, queryContext, parameters)
{
_columns = columns;
_source = source;
_resolver = resolver;
_topRows = owner.TopRows;
_compiledBody = compiledBody;
RowNum = 1;
if (distinct)
_distinctSet = new HashSet<Row>(new RowEqualityComparer());
LispExecutive.Enter(resolver);
}
