func (this *builder) beginMutate(keyspace datastore.Keyspace,
ksref *algebra.KeyspaceRef, keys, where expression.Expression) error {
ksref.SetDefaultNamespace(this.namespace)
term := algebra.NewKeyspaceTerm(ksref.Namespace(), ksref.Keyspace(), nil, ksref.As(), nil)
this.children = make([]Operator, 0, 8)
this.subChildren = make([]Operator, 0, 8)
if keys != nil {
scan := NewKeyScan(keys)
this.children = append(this.children, scan)
} else {
scan, err := this.selectScan(keyspace, term)
if err != nil {
return err
}
this.children = append(this.children, scan)
}
fetch := NewFetch(keyspace, term)
this.subChildren = append(this.subChildren, fetch)
if where != nil {
this.subChildren = append(this.subChildren, NewFilter(where))
}
return nil
}
func (this *Join) UnmarshalJSON(body []byte) error {
var _unmarshalled struct {
_ string `json:"#operator"`
Names string `json:"namespace"`
Keys string `json:"keyspace"`
On string `json:"on_keys"`
Outer bool `json:"outer"`
As string `json:"as"`
}
var keys_expr expression.Expression
err := json.Unmarshal(body, &_unmarshalled)
if err != nil {
return err
}
if _unmarshalled.On != "" {
keys_expr, err = parser.Parse(_unmarshalled.On)
if err != nil {
return err
}
}
this.outer = _unmarshalled.Outer
this.term = algebra.NewKeyspaceTerm(_unmarshalled.Names, _unmarshalled.Keys,
nil, _unmarshalled.As, keys_expr)
this.keyspace, err = datastore.GetKeyspace(_unmarshalled.Names, _unmarshalled.Keys)
return err
}
func (this *PrimaryScan) UnmarshalJSON(body []byte) error {
var _unmarshalled struct {
_ string `json:"#operator"`
Index string `json:"index"`
Names string `json:"namespace"`
Keys string `json:"keyspace"`
Using datastore.IndexType `json:"using"`
}
err := json.Unmarshal(body, &_unmarshalled)
if err != nil {
return err
}
k, err := datastore.GetKeyspace(_unmarshalled.Names, _unmarshalled.Keys)
if err != nil {
return err
}
this.term = algebra.NewKeyspaceTerm(
_unmarshalled.Names, _unmarshalled.Keys,
nil, "", nil)
indexer, err := k.Indexer(_unmarshalled.Using)
if err != nil {
return err
}
index, err := indexer.IndexByName(_unmarshalled.Index)
if err != nil {
return err
}
primary, ok := index.(datastore.PrimaryIndex)
if ok {
this.index = primary
return nil
}
return fmt.Errorf("Unable to unmarshal %s as primary index.", _unmarshalled.Index)
}
func (this *Fetch) UnmarshalJSON(body []byte) error {
var _unmarshalled struct {
_ string `json:"#operator"`
Proj string `json:"projection"`
Names string `json:"namespace"`
Keys string `json:"keyspace"`
As string `json:"as"`
}
var proj_expr expression.Path
err := json.Unmarshal(body, &_unmarshalled)
if err != nil {
return err
}
if _unmarshalled.Proj != "" {
expr, err := parser.Parse(_unmarshalled.Proj)
logging.Infop("Fetch", logging.Pair{"_unmarshalled.Proj", _unmarshalled.Proj},
logging.Pair{"err", err},
logging.Pair{"expr", expr},
)
if err != nil {
return err
}
_proj_expr, is_path := expr.(expression.Path)
if !is_path {
return fmt.Errorf("Fetch.UnmarshalJSON: cannot resolve path expression from %s", _unmarshalled.Proj)
}
proj_expr = _proj_expr
}
this.term = algebra.NewKeyspaceTerm(_unmarshalled.Names, _unmarshalled.Keys,
proj_expr, _unmarshalled.As, nil)
this.keyspace, err = datastore.GetKeyspace(_unmarshalled.Names, _unmarshalled.Keys)
return err
}
func (this *IndexScan) UnmarshalJSON(body []byte) error {
var _unmarshalled struct {
_ string `json:"#operator"`
Index string `json:"index"`
Names string `json:"namespace"`
Keys string `json:"keyspace"`
Using datastore.IndexType `json:"using"`
Spans planner.Spans `json:"spans"`
Distinct bool `json:"distinct"`
Limit int64 `json:"limit"`
}
err := json.Unmarshal(body, &_unmarshalled)
if err != nil {
return err
}
k, err := datastore.GetKeyspace(_unmarshalled.Names, _unmarshalled.Keys)
if err != nil {
return err
}
this.term = algebra.NewKeyspaceTerm(
_unmarshalled.Names, _unmarshalled.Keys,
nil, "", nil)
this.spans = _unmarshalled.Spans
this.distinct = _unmarshalled.Distinct
this.limit = _unmarshalled.Limit
indexer, err := k.Indexer(_unmarshalled.Using)
if err != nil {
return err
}
this.index, err = indexer.IndexByName(_unmarshalled.Index)
return err
}
