Feature request: Add line breaks in long expressions

[joncurrier]

Suppose I have a query like this:

 SELECT CASE 
          WHEN condition_1 = 1 
            AND condition_2 = 2 
            AND condition_3 = 3 
            AND condition_4 = 4 
            AND condition_5 = 5
            THEN '5 conditions satisfied'
          WHEN condition_6_with_a_long_name = 6 
            THEN 'Condition 6 satisfied'
          ELSE 'Uh-oh'
        END AS long_case_field,
        field_with_long_name_1 + field_with_long_name_2 + field_with_long_name_3 + field_with_long_name_4 + field_with_long_name_5 + field_with_long_name_6 AS sum_of_fields
   FROM my_table

When I run sqlparse.format(sql, reindent_aligned=True), I get this:

SELECT CASE WHEN condition_1 = 1 AND condition_2 = 2 AND condition_3 = 3 AND condition_4 = 4 AND condition_5 = 5 THEN '5 conditions satisfied'
            WHEN condition_6_with_a_long_name = 6                                                                THEN 'Condition 6 satisfied'
            ELSE 'Uh-oh'
             END AS long_case_field,
       field_with_long_name_1 + field_with_long_name_2 + field_with_long_name_3 + field_with_long_name_4 + field_with_long_name_5 + field_with_long_name_6 AS sum_of_fields
  FROM my_table

I think CASE statements are generally more readable when there's a line break before every AND/OR, so I'd prefer the formatter not to collapse these all to one line. For the long function expression, having a max_line_length after which it would add a line break before every + or other operator would be very nice to have also, so the output would be like

SELECT CASE WHEN condition_1 = 1 
             AND condition_2 = 2 
             AND condition_3 = 3 
             AND condition_4 = 4 
             AND condition_5 = 5                  THEN '5 conditions satisfied'
            WHEN condition_6_with_a_long_name = 6 THEN 'Condition 6 satisfied'
            ELSE 'Uh-oh'
             END AS long_case_field,
       field_with_long_name_1 
       + field_with_long_name_2 
       + field_with_long_name_3 
       + field_with_long_name_4 
       + field_with_long_name_5 
       + field_with_long_name_6 AS sum_of_fields
  FROM my_table