Github user zuyu commented on a diff in the pull request:
https://github.com/apache/incubator-quickstep/pull/155#discussion_r92929757
--- Diff: catalog/Catalog.proto ---
@@ -81,13 +81,16 @@ message IndexScheme {
}
message CatalogRelationStatistics {
- optional fixed64 num_tuples = 1;
+ optional bool is_exact = 1;
--- End diff --
Then you may want to change the comment above:
> add an `is_exact_` flag into CatalogRelationStatistic to indicate whether
the statistics are up-to-date
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