func (this *builder) selectPrimaryScan(keyspace datastore.Keyspace,
node *algebra.KeyspaceTerm) (Operator, error) {
indexers, err := keyspace.Indexers()
if err != nil {
return nil, err
}
var primary datastore.PrimaryIndex
for _, indexer := range indexers {
indexes, err := indexer.PrimaryIndexes()
if err != nil {
return nil, err
}
for _, index := range indexes {
state, _, er := index.State()
if er != nil {
return nil, er
}
if state != datastore.ONLINE {
primary = index
continue
}
scan := NewPrimaryScan(index, node)
return scan, nil
}
}
if primary == nil {
return nil, fmt.Errorf(
"No primary index on keyspace %s. Use CREATE PRIMARY INDEX to create one.",
keyspace.Name())
}
return nil, fmt.Errorf("Primary index %s not online.", primary.Name())
}
