Additional statistics about a
ResultSet][google.spanner.v1.ResultSet] or
PartialResultSet][google.spanner.v1.PartialResultSet].
Aggregated statistics from the execution of the query. Only
present when the query is profiled. For example, a query could
return the statistics as follows: :: {
"rows_returned": "3", "elapsed_time": "1.22 secs",
"cpu_time": "1.19 secs" }
Standard DML returns an exact count of rows that were
modified.