diff --git a/cmd/mtredisalize/sqlite.go b/cmd/mtredisalize/sqlite.go
index b10abf8..bb24ef9 100644
--- a/cmd/mtredisalize/sqlite.go
+++ b/cmd/mtredisalize/sqlite.go
@@ -366,50 +366,50 @@ func (ss *SqliteSession) interleavedSpatialQuery(
 		zmin, zmax = order(zmin, zmax)
 		cub := common.Cuboid{P1: c1, P2: c2}
 		rangeStmt := ss.txStmt(ss.backend.rangeStmt)
-		var (
-			err  error
-			rows *sql.Rows
-		)
+
+		zcode := zmin
+
 	loop:
-		// log.Printf("query %d %d\n", zmin, zmax)
-		if rows, err = rangeStmt.Query(zmin, zmax); err != nil {
-			log.Printf("Error in range query: %s\n", err)
+
+		rows, err := rangeStmt.Query(zcode, zmax)
+		if err != nil {
+			log.Printf("error: fetching range failed: %s\n", err)
 			return
 		}
+
 		for rows.Next() {
-			var zcode int64
 			var data []byte
 			if err = rows.Scan(&zcode, &data); err != nil {
-				log.Printf("Error in scanning row: %s\n", err)
 				rows.Close()
+				log.Printf("error: scanning row failed: %s\n", err)
 				return
 			}
-			// log.Printf("zcode: %d\n", zcode)
 			c := common.InterleavedToCoord(zcode)
 			if cub.Contains(c) {
-				var encodedKey []byte
-				if encodedKey, err = common.EncodeStringToBytes(common.CoordToPlain(c)); err != nil {
-					log.Printf("Key encoding failed: %s\n", err)
-					rows.Close()
-					return
-				}
+				key := common.StringToBytes(common.CoordToPlain(c))
+				//fmt.Printf("sending: %q\n", c)
 				select {
-				case blocks <- Block{Key: encodedKey, Data: data}:
+				case blocks <- Block{Key: key, Data: data}:
 				case <-done:
-					rows.Close()
 					return
 				}
-			} else { // Left the cuboid
-				// log.Printf("Left cuboid %d\n", zcode)
-				rows.Close()
-				zmin = common.BigMin(zmin, zmax, zcode)
+			} else {
+				if err = rows.Close(); err != nil {
+					log.Printf("error: closing range failed: %s\n", err)
+					return
+				}
+				zcode = common.BigMin(zmin, zmax, zcode)
 				goto loop
 			}
 		}
+
 		if err = rows.Err(); err != nil {
-			log.Printf("Error in range query: %s\n", err)
+			log.Printf("error: iterating range failed: %s\n", err)
+		}
+
+		if err = rows.Close(); err != nil {
+			log.Printf("error: closing range failed: %s\n", err)
 		}
-		rows.Close()
 	}()
 
 	return