liukun4515 commented on code in PR #3222:
URL: https://github.com/apache/arrow-datafusion/pull/3222#discussion_r954773817
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datafusion/core/src/execution/context.rs:
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@@ -1377,6 +1378,8 @@ impl SessionState {
}
rules.push(Arc::new(ReduceOuterJoin::new()));
rules.push(Arc::new(FilterPushDown::new()));
+ // we do type coercion after filter push down so that we don't push
CAST filters to Parquet
Review Comment:
I am confused about this comment and explain why do the type coercion after
the filter push down optimizer rule.
I think the type coercion rule should be done in preview stage.
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