alamb commented on code in PR #8294:
URL: https://github.com/apache/arrow-datafusion/pull/8294#discussion_r1406589780
##########
datafusion/core/src/datasource/physical_plan/parquet/row_groups.rs:
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@@ -431,11 +320,29 @@ macro_rules! get_null_count_values {
impl<'a> PruningStatistics for RowGroupPruningStatistics<'a> {
fn min_values(&self, column: &Column) -> Option<ArrayRef> {
- get_min_max_values!(self, column, min, min_bytes)
+ let field = self
+ .parquet_schema
+ .fields()
+ .find(&column.name)
+ .map(|(_idx, field)| field)?;
+
+ RowGroupStatisticsConverter::new(field)
Review Comment:
TLDR is that
[Column](https://docs.rs/datafusion/latest/datafusion/common/struct.Column.html)
does not address nested fields. The structure that does is
[datafusion_physical_expr](https://docs.rs/datafusion-physical-expr/33.0.0/datafusion_physical_expr/index.html)::[expressions](https://docs.rs/datafusion-physical-expr/33.0.0/datafusion_physical_expr/expressions/index.html)::[GetFieldAccessExpr](https://docs.rs/datafusion-physical-expr/33.0.0/datafusion_physical_expr/expressions/enum.GetFieldAccessExpr.html#)
or
https://docs.rs/datafusion/latest/datafusion/logical_expr/expr/enum.Expr.html#variant.GetIndexedField
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