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[jira] [Created] (FLINK-9854) Allow passing multi-line input to SQL Client CLI

Timo Walther created FLINK-9854:

             Summary: Allow passing multi-line input to SQL Client CLI
                 Key: FLINK-9854
                 URL: https://issues.apache.org/jira/browse/FLINK-9854
             Project: Flink
          Issue Type: Sub-task
          Components: Table API & SQL
            Reporter: Timo Walther

We should support {{flink-cli < query01.sql}} or {{echo "INSERT INTO bar SELECT * FROM foo" | flink-cli}} for convenience. I'm not sure how well we support multilines and EOF right now. Currenlty, with the experimental {{-u}} flag the user also gets the correct error code after the submission, with {{flink-cli < query01.sql}} the CLI would either stay in interactive mode or always return success.

We should also discuss which statements are allowed. Actually, only DDL and {{INSERT INTO}} statements make sense so far.

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