andygrove opened a new issue, #3001: URL: https://github.com/apache/arrow-datafusion/issues/3001
**Describe the bug** The user guide page at https://arrow.apache.org/datafusion/cli/index.html states that "It is necessary to provide schema information for CSV files since DataFusion does not automatically infer the schema when using SQL to query CSV files." but this is not true, as demonstrated below: ``` DataFusion CLI v10.0.0 ❯ create external table a stored as csv with header row location '/tmp/a.csv'; 0 rows in set. Query took 0.017 seconds. ❯ select * from a; +---+---+---+---+ | a | b | c | d | +---+---+---+---+ | 1 | 2 | 3 | 4 | +---+---+---+---+ 1 row in set. Query took 0.011 seconds. ❯ describe a; +-------------+-----------+-------------+ | column_name | data_type | is_nullable | +-------------+-----------+-------------+ | a | Int64 | NO | | b | Int64 | NO | | c | Int64 | NO | | d | Int64 | NO | +-------------+-----------+-------------+ 4 rows in set. Query took 0.017 seconds. ``` **To Reproduce** See above. **Expected behavior** We should update the user guide to state that specifying a schema is optional. **Additional context** None -- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. To unsubscribe, e-mail: [email protected] For queries about this service, please contact Infrastructure at: [email protected]
