alamb commented on pull request #1875:
URL: 
https://github.com/apache/arrow-datafusion/pull/1875#issuecomment-1057113073


   Taking inspiration from`psql` , it implements a `\i` command (not a command 
line argument) for this usecase. It *includes* a file:
   
   https://www.postgresql.org/docs/13/app-psql.html
   
   > \i or \include filename
   > Reads input from the file filename and executes it as though it had been 
typed on the keyboard.
   > 
   > If filename is - (hyphen), then standard input is read until an EOF 
indication or \q meta-command. This can be used to intersperse interactive 
input with input from files. Note that Readline behavior will be used only if 
it is active at the outermost level.
   
   It appears that mysql has a similar command `source` or `\.` that does the 
same thing
   
   https://dev.mysql.com/doc/refman/8.0/en/mysql-batch-commands.html
   
   
   Thus I would recommend implementing a `\i` command (and possibly also a 
`source` command)
   
   


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