Apache Drill能否读取Apache ORC文件格式？

Absolutely! Apache Drill has native support for reading Apache ORC (Optimized Row Columnar) files — both of your core questions boil down to the same capability, since "ORC" is shorthand for Apache ORC.

Here's a quick breakdown of how this works and key details to know:

• Out-of-the-box compatibility: No extra plugins or extensions are required to read ORC files with Drill. Support is included in the default set of supported storage formats.
• Direct querying: You can query ORC files just like any other supported format. For example, if your ORC file is stored in a local directory or distributed storage (like HDFS, S3), use a query like:

  SELECT * FROM dfs.`/path/to/your/orc/file.orc`;
  

• Automatic schema inference: Drill detects the schema of ORC files automatically, including complex nested structures that ORC often supports. No manual schema definition is needed upfront.
• Performance optimizations: Drill leverages ORC's columnar design to boost query speed, using features like predicate pushdown and column pruning — it only reads the specific data your query requires, avoiding unnecessary processing.

Just a quick check: Ensure your Drill instance has access to the storage location (local, cloud, or Hadoop-based) where your ORC files live, and double-check file paths in your queries for accuracy.

内容的提问来源于stack exchange，提问作者Андрей Смирнов