Github user wzhfy commented on the issue:
https://github.com/apache/spark/pull/15090
The latest update includes the following changes:
1. move the test suite for column stats into sql/core;
2. extract the computing logic in `AnalyzeColumnCommand` as a separate
method;
3. add an api for testing in `SessionState`: `computeColumnStats()`, so
that we can get the stats result directly by calling this api and compare it
with the expected result in our test cases , without depending on the catalog
module.
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