mapleFU commented on code in PR #36967:
URL: https://github.com/apache/arrow/pull/36967#discussion_r1281321461
##########
java/dataset/src/main/java/org/apache/arrow/dataset/scanner/ScanOptions.java:
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@@ -66,6 +76,18 @@ public Optional<String[]> getColumns() {
return columns;
}
+ public Optional<String> getFilter() {
+ return filter;
+ }
+
+ public long getStartOffset() {
Review Comment:
I found that the code is parquet-mr is:
1. `ParquetInputSplit`
2. It will generate a `metadataFilter` by range:
https://github.com/apache/parquet-mr/blob/d2c3c6d2e761a17b75d56fd356a37a2f754072f7/parquet-hadoop/src/main/java/org/apache/parquet/ParquetReadOptions.java#L39
3. Finally, the filter is:
https://github.com/apache/parquet-mr/blob/master/parquet-hadoop/src/main/java/org/apache/parquet/format/converter/ParquetMetadataConverter.java#L1244
Maybe it's ok to use same logic here.
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