[ORC-753] [C++] Clear stream state of ColumnReader after seek

• Type: Bug
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 1.7.0
• Component/s: C++
• Assignee: Gang Wu
• Reporter: Gang Wu
• Created: 19/Feb/21 15:24
• Updated: 29/Mar/22 01:03
• Resolved: 29/Mar/22 01:03

Description

C++ ORC ColumnReaders of some types have cached buffer state to issue next I/O. This is fine if we read streams continuously. However, if we try to skip some row groups and seek to a random row group, the cached buffer state is wrong and may lead to undefined behavior.

Issue Links

• links to: GitHub Pull Request #645