godfreyhe commented on issue #8389: [FLINK-12399][table] Fix FilterableTableSource does not change after applyPredicate URL: https://github.com/apache/flink/pull/8389#issuecomment-492069318 @walterddr thanks for the fix. It's a little difficult for users to understand `explainSource` and implement it, even though we rename `explainSource` to `getSourceDigest`(or other names). could we keep the logic about `re-compute digest after push down` in rules ?
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