func (this *builder) VisitKeyspaceTerm(node *algebra.KeyspaceTerm) (interface{}, error) {
node.SetDefaultNamespace(this.namespace)
keyspace, err := this.getTermKeyspace(node)
if err != nil {
return nil, err
}
if node.Keys() != nil {
scan := NewKeyScan(node.Keys())
this.children = append(this.children, scan)
} else {
if this.subquery {
return nil, errors.NewError(nil, fmt.Sprintf(
"FROM in subquery must use KEYS clause: FROM %s.",
node.Keyspace()))
}
scan, err := this.selectScan(keyspace, node)
if err != nil {
return nil, err
}
this.children = append(this.children, scan)
}
fetch := NewFetch(keyspace, node)
this.subChildren = append(this.subChildren, fetch)
return nil, nil
}
func (this *builder) getTermKeyspace(node *algebra.KeyspaceTerm) (datastore.Keyspace, error) {
node.SetDefaultNamespace(this.namespace)
ns := node.Namespace()
datastore := this.datastore
if strings.ToLower(ns) == "#system" {
datastore = this.systemstore
}
namespace, err := datastore.NamespaceByName(ns)
if err != nil {
return nil, err
}
keyspace, err := namespace.KeyspaceByName(node.Keyspace())
if err != nil {
return nil, err
}
return keyspace, nil
}