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Best practices for writing / debugging complex PL/pgSQL queries


Why you don't call plpgsql function directly?

do only:

 SELECT 
      user_id, 
      id,
      created_at
  -- possibly a ton of other complicated stuff
involving other functions and variables
  FROM my_schema.my_other_fcn()

I don't like a this style of plpgsql programming - wrapping queries. You can block very effective planner - because plpgsql function is black box for optimizer - so you can expect terrible performance issues on large data. PLpgSQL functions should not to substitute a views.

Statement DO should not to return any result. Simply - PostgreSQL functions should not to substitute PostgreSQL views.


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