Commits on Sep 10, 2022

1. fix: Pass file_format values as-is in external table configuration …

   Common use of FILE_FORMAT under CREATE EXTERNAL TABLE includes specifying
   a previously created format name (FORMAT_NAME = 'NAME') or the various
   type options (TYPE=CSV FIELD_DELIMITER='|').
   
   Both of these require defining string literals with the single quote
   character (') that should not be escaped (\\').
   
   This change removes the escaping of single quotes performed for the
   file_format values to allow them to be specified without failing
   the query compilation.
   
   Some examples have also been added to the documentation
   to make it easier to understand how values for file_format
   need to be passed for external tables.
   
   Testing:
   
     - Modified unit tests to exercise passing of typical file format values
     - Ran 'make test' to confirm existing tests continue to pass
     - Setup a trial account, exported env-vars and ran 'make test-acceptance'
       and verified all tests passed
     - Attempted an external table creation on a personal account with the
       changes included through a local buildand observed it to execute a
       successful SQL. Tried with both FORMAT_NAME and FIELD_DELIMITER
       options with string literal values.
   
   Fixes Snowflake-Labs#1046

   

   sfc-gh-hachouraria committed Sep 10, 2022
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