Beispiel #1
0
func (d *dsImpl) Run(fq *ds.FinalizedQuery, cb ds.RawRunCB) error {
	idx, head := d.data.getQuerySnaps(!fq.EventuallyConsistent())
	err := executeQuery(fq, d.data.aid, d.ns, false, idx, head, cb)
	if d.data.maybeAutoIndex(err) {
		idx, head = d.data.getQuerySnaps(!fq.EventuallyConsistent())
		err = executeQuery(fq, d.data.aid, d.ns, false, idx, head, cb)
	}
	return err
}
Beispiel #2
0
func (d *dsImpl) Count(fq *ds.FinalizedQuery) (ret int64, err error) {
	idx, head := d.data.getQuerySnaps(!fq.EventuallyConsistent())
	ret, err = countQuery(fq, d.data.aid, d.ns, false, idx, head)
	if d.data.maybeAutoIndex(err) {
		idx, head := d.data.getQuerySnaps(!fq.EventuallyConsistent())
		ret, err = countQuery(fq, d.data.aid, d.ns, false, idx, head)
	}
	return
}
Beispiel #3
0
func (d rdsImpl) fixQuery(fq *ds.FinalizedQuery) (*datastore.Query, error) {
	ret := datastore.NewQuery(fq.Kind())

	start, end := fq.Bounds()
	if start != nil {
		ret = ret.Start(start.(datastore.Cursor))
	}
	if end != nil {
		ret = ret.End(end.(datastore.Cursor))
	}

	for prop, vals := range fq.EqFilters() {
		if prop == "__ancestor__" {
			p, err := dsF2RProp(d.aeCtx, vals[0])
			if err != nil {
				return nil, err
			}
			ret = ret.Ancestor(p.Value.(*datastore.Key))
		} else {
			filt := prop + "="
			for _, v := range vals {
				p, err := dsF2RProp(d.aeCtx, v)
				if err != nil {
					return nil, err
				}

				ret = ret.Filter(filt, p.Value)
			}
		}
	}

	if lnam, lop, lprop := fq.IneqFilterLow(); lnam != "" {
		p, err := dsF2RProp(d.aeCtx, lprop)
		if err != nil {
			return nil, err
		}
		ret = ret.Filter(lnam+" "+lop, p.Value)
	}

	if hnam, hop, hprop := fq.IneqFilterHigh(); hnam != "" {
		p, err := dsF2RProp(d.aeCtx, hprop)
		if err != nil {
			return nil, err
		}
		ret = ret.Filter(hnam+" "+hop, p.Value)
	}

	if fq.EventuallyConsistent() {
		ret = ret.EventualConsistency()
	}

	if fq.KeysOnly() {
		ret = ret.KeysOnly()
	}

	if lim, ok := fq.Limit(); ok {
		ret = ret.Limit(int(lim))
	}

	if off, ok := fq.Offset(); ok {
		ret = ret.Offset(int(off))
	}

	for _, o := range fq.Orders() {
		ret = ret.Order(o.String())
	}

	ret = ret.Project(fq.Project()...)
	if fq.Distinct() {
		ret = ret.Distinct()
	}

	return ret, nil
}