Dandandan commented on a change in pull request #409:
URL: https://github.com/apache/arrow-datafusion/pull/409#discussion_r637935409
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File path: datafusion/src/optimizer/filter_push_down.rs
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@@ -379,6 +379,11 @@ fn optimize(plan: &LogicalPlan, mut state: State) ->
Result<LogicalPlan> {
}
if add_to_provider {
+ // Don't add expression again if it's already present in
+ // pushed down filters.
+ if new_filters.iter().any(|filter| filter.eq(filter_expr))
{
Review comment:
```suggestion
if new_filters.contains(filter_expr) {
```
something like this should work?
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