Procédure plpgsql: comment ajouter un champ auto_increment à une requête

Question

J'ai la procédure/fonction plpgsql suivante, où j'essaie d'obtenir un ensemble d'enregistrements avec une valeur Auto_increment. J'ai créé le champ "position" pour stocker l'auto-incrément, et je suppose que c'est faux, mais je ne sais pas comment résoudre cette requête où je veux ajouter un nouveau champ calculé. Je pense que mon intention est claire. Est-ce que quelqu'un pourrait m'aider?

CREATE OR REPLACE FUNCTION pra2.GetRankingOfPilots(IN sea pra2.season.name%type) 
RETURNS setof RECORD AS $BODY$ 
DECLARE 
    r RECORD; 
    fila integer; 
BEGIN 
    fila:=0; 
    FOR r IN SELECT 
      position, 
      driver.name driver, 
      constructor.name constructor, 
      season.name season, 
      CAST(sum(runs.points) AS int) totalpuntos 
     FROM 
      pra2.hired hired 
     INNER JOIN pra2.constructor on hired.name_constructor = pra2.constructor.name 
     INNER JOIN pra2.driver on hired.num_driver = pra2.driver.num 
     INNER JOIN pra2.runs on pra2.driver.num=pra2.runs.num_driver 
     INNER JOIN pra2.race on pra2.runs.name_race=pra2.race.name AND pra2.runs.season_fk=pra2.race.season_fk AND pra2.runs.season_fk=pra2.race.season_fk 
     INNER JOIN pra2.season on hired.name_season=pra2.season.name AND pra2.race.season_fk=pra2.season.name 
     WHERE 
      pra2.season.name=sea 
     GROUP BY 
      season,driver,constructor 
     ORDER BY 
      TotalPuntos Desc 
    LOOP 
     fila:=fila+1; 
     r.posicion:=fila; 
     RETURN NEXT r; 
    END LOOP; 
RETURN; 
END; 
$BODY$ 
LANGUAGE plpgsql; 

Merci d'avance!

Answer 1

essayer:

SELECT 
      row_number() over() position, 
      driver.name driver, 
      constructor.name constructor, 
      season.name season, 
      CAST(sum(runs.points) AS int) totalpuntos 
     FROM 
      pra2.hired hired 
     INNER JOIN pra2.constructor on hired.name_constructor = pra2.constructor.name 
     INNER JOIN pra2.driver on hired.num_driver = pra2.driver.num 
     INNER JOIN pra2.runs on pra2.driver.num=pra2.runs.num_driver 
     INNER JOIN pra2.race on pra2.runs.name_race=pra2.race.name AND pra2.runs.season_fk=pra2.race.season_fk AND pra2.runs.season_fk=pra2.race.season_fk 
     INNER JOIN pra2.season on hired.name_season=pra2.season.name AND pra2.race.season_fk=pra2.season.name 
     WHERE 
      pra2.season.name=sea 
     GROUP BY 
      season,driver,constructor 
     ORDER BY 
      TotalPuntos Desc