What are the special symbols in Parquet files?

Question

I'm writing Parquet with Java API and syncing to HDFS.

When I get the Parquet file and read it with vi, I see many strange symbols like:

^U^B^U^@^U^H^U^H^\^X^H^A^@^@^@^@^@^@^@^X^H^A^@^@^@^@^@^@^@^V^@^@^@^@^A^@^@^@^@^@^@^@^U^@^U

I'm wondering how to interpret these.

Answer 1

These are non-printable characters.

Examples:

• ^@ is the representation of NUL character (ASCII value 0)
• ^M is a carriage return