impl/memory: Implement Queries

impl/memory/datastore_index.go

Index: impl/memory/datastore_index.go
diff --git a/impl/memory/datastore_index.go b/impl/memory/datastore_index.go
index 37200d9c22fde7df6a3d3a14795f615ec3c947a9..9bf8c3c9589c3a7dd37b3c96e215ebc7edfaa8f7 100644
--- a/impl/memory/datastore_index.go
+++ b/impl/memory/datastore_index.go
@@ -14,8 +14,6 @@ import (
 	"github.com/luci/gkvlite"
 )
 
-var indexCreationDeterministic = false
-
 type qIndexSlice []*ds.IndexDefinition
 
 func (s qIndexSlice) Len() int           { return len(s) }
@@ -39,7 +37,7 @@ func defaultIndicies(kind string, pmap ds.PropertyMap) []*ds.IndexDefinition {
 		ret = append(ret, &ds.IndexDefinition{Kind: kind, SortBy: []ds.IndexColumn{{Property: name}}})
 		ret = append(ret, &ds.IndexDefinition{Kind: kind, SortBy: []ds.IndexColumn{{Property: name, Direction: ds.DESCENDING}}})
 	}
-	if indexCreationDeterministic {
+	if serializationDeterministic {
 		sort.Sort(ret)
 	}
 	return ret