tschwarzinger commented on code in PR #23670:
URL: https://github.com/apache/datafusion/pull/23670#discussion_r3664332121
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datafusion/datasource/src/file_scan_config/mod.rs:
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@@ -2480,6 +2483,46 @@ mod tests {
assert_eq!(partition_stats.total_byte_size, Precision::Exact(800));
}
+ #[test]
+ fn test_statistics_with_filter() {
+ assert_num_rows_with_filter(Precision::Absent, Precision::Absent);
+ assert_num_rows_with_filter(Precision::Exact(100),
Precision::Inexact(100));
+ assert_num_rows_with_filter(Precision::Inexact(100),
Precision::Inexact(100));
+ assert_num_rows_with_filter(Precision::Exact(0), Precision::Exact(0));
+
+ /// Creates a [`FileScanConfig`] with a filter and calls
[`FileScanConfig::statistics`].
+ /// Then the function checks the output num_rows stats, given the
input num_rows stats.
+ fn assert_num_rows_with_filter(
+ input_num_rows: Precision<usize>,
+ expected_num_rows: Precision<usize>,
+ ) {
+ // Create a schema with 4 columns
Review Comment:
I've removed this comment in both tests.
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