8e364fb848
Something the upstream system(eg, hive) may create empty orc file which only has a header and footer, without schema. And if we call `_reader->createRowReader()` with selected columns, it will throw ParserError: Invalid column selected xx. So here we first check its number of rows and skip these kind of files. This is only a fix for non-vec load, for vec load, it use arrow scanner to read orc file, which does not have this problem.