CSV SerDe libraries

When you create a table for CSV data in Athena, you can use either the Open CSV SerDe or the Lazy Simple SerDe library. To help you decide which to use, consider the following guidelines.

• If your data contains values enclosed in double quotes ("), you can use the Open CSV SerDe library to deserialize the values in Athena. If your data does not contain values enclosed in double quotes ("), you can omit specifying any SerDe. In this case, Athena uses the default Lazy Simple SerDe. For information, see Lazy Simple SerDe for CSV, TSV, and custom-delimited files.

• If your data has UNIX numeric TIMESTAMP values (for example, 1579059880000), use the Open CSV SerDe. If your data uses the java.sql.Timestamp format, use the Lazy Simple SerDe.

Topics

• Lazy Simple SerDe for CSV, TSV, and custom-delimited files
• Open CSV SerDe for processing CSV