twalthr commented on issue #8738: [FLINK-12845][sql-client] Execute multiple 
statements in command line…
URL: https://github.com/apache/flink/pull/8738#issuecomment-525214337
 
 
   As far as I know Hive is also not SQL compliant and backslashes should not 
be used for escaping unless used with the following syntax:
   
   ```
   String literals must be enclosed in single quotes (e.g., SELECT 'Hello 
World'). Duplicate a single quote for escaping (e.g., SELECT 'It''s me.'). 
Unicode characters are supported in string literals. If explicit unicode code 
points are required, use the following syntax:
   
   Use the backslash (\) as escaping character (default): SELECT U&'\263A'
   Use a custom escaping character: SELECT U&'#263A' UESCAPE '#'
   ```
   
   What we need is a slightly different architecture for the SQL Client. 
Currently the DDL, DCL commands are parsed on the CLI side. However, this 
should happen in TableEnvironment instead such that the CLI is just a thin 
wrapper around the core API.

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