The New Features and Notable Changes of ORC 1.9:

- [ORC-961]({{site.jira}}/ORC-961): Expose metrics of the reader
- [ORC-1167]({{site.jira}}/ORC-1167): Support orc.row.batch.size configuration
- [ORC-1252]({{site.jira}}/ORC-1252): Expose io metrics for write operation
- [ORC-1301]({{site.jira}}/ORC-1301): Enforce C++ 17
- [ORC-1310]({{site.jira}}/ORC-1310): allowlist Support for plugin filter
- [ORC-1356]({{site.jira}}/ORC-1356): Use Intel AVX-512 instructions to accelerate the Rle-bit-packing decode
- [ORC-1385]({{site.jira}}/ORC-1385): Support schema evolution from numeric to numeric
- [ORC-1386]({{site.jira}}/ORC-1386): Support schema evolution from primitive to string group/decimal/timestamp
