uranusjr opened a new pull request, #32518:
URL: https://github.com/apache/airflow/pull/32518

   As mentioned in #32177.
   
   * Move some imports to type-checking block to avoid runtime cost
   * Use `SELECT 1` to avoid loading ORM model objects unnecessarily
   * Use scalars() to avoid needing to unpack ORM models
   * Use `table.c[key]` instead of getattr(table.c, key). They work basically 
the same, except getattr is worse for this purpose (potential name conflicts)
   * Use generators when the arguments are immediately unpacked into a function 
call so there's no need to produce an intermediate list


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