taiyang-li commented on code in PR #2048:
URL: https://github.com/apache/orc/pull/2048#discussion_r1815884042
##########
c++/include/orc/Reader.hh:
##########
@@ -605,6 +612,26 @@ namespace orc {
*/
virtual std::map<uint32_t, BloomFilterIndex> getBloomFilters(
uint32_t stripeIndex, const std::set<uint32_t>& included) const = 0;
+
+ /**
+ * Get the input stream for the ORC file.
+ */
+ virtual InputStream* getStream() const = 0;
+
+ /**
+ * Get the footer of the ORC file.
+ */
+ virtual const proto::Footer* getFooter() const = 0;
+
+ /**
+ * Get the schema of the ORC file.
+ */
+ virtual const proto::Metadata* getMetadata() const = 0;
+
+ virtual void preBuffer(const std::vector<int>& stripes, const
std::list<uint64_t>& includeTypes,
Review Comment:
@ffacs it is a typical use case in spark. ORC files may be very large, and
spark will split it into several file splits, each file split contains several
stripes, we can even discard some candidate stripes by stripe statistics after
that.
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