alamb commented on code in PR #23420:
URL: https://github.com/apache/datafusion/pull/23420#discussion_r3562149462
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datafusion/datasource-parquet/src/source.rs:
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@@ -827,7 +829,79 @@ impl FileSource for ParquetSource {
// because even if scan pushdown is disabled we can still use the
filters for stats pruning.
let config_pushdown_enabled =
config.execution.parquet.pushdown_filters;
let table_pushdown_enabled = self.pushdown_filters();
- let pushdown_filters = table_pushdown_enabled ||
config_pushdown_enabled;
+ let mut pushdown_filters = table_pushdown_enabled ||
config_pushdown_enabled;
+ // Narrow-projection gate (issue #3463, discussion on PR #23369):
Review Comment:
we can probably reduce this comment substantially
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