PostgreSQL的動態SQL查詢

Question

我需要動態地創建此查詢：

INSERT INTO "calle" (a, b, c, d) 
SELECT l.id_localidad, v.tipovial, v.nomvial, v.geom 
    FROM "010010001v" AS v, 
dblink('dbname=xxx port=xxxx host=xxxxx user=xxx password=xxxxx', 
    'SELECT id_localidad 
      FROM "localidadesurbanas" 
WHERE cvgeo = ''010010001''') 
    AS l(id_localidad integer); 

唯一的變化就是：

... 
FROM "010010001v" 
... 
WHERE cvgeo = ''010010001''') 
... 

爲：

SELECT tablename 
    FROM pg_tables 
WHERE schemaname = 'public' 
    AND tablename LIKE '01%v'; 

"010010001v" 
"010010293v" 
"010010479v" 
... 

我希望是明確的。 如果可能的話教程學習PL/pgSQL。 謝謝。

Answer 1

execute format ($dynamic$ 
    INSERT INTO "calle" (a, b, c, d) 
    SELECT l.id_localidad, v.tipovial, v.nomvial, v.geom 
    FROM 
     %I AS v, 
     dblink(
      'dbname=xxx port=xxxx host=xxxxx user=xxx password=xxxxx', 
      ' 
       SELECT id_localidad 
       FROM "localidadesurbanas" 
       WHERE cvgeo = $1 
      ' 
     ) AS l(id_localidad integer); 
    $dynamic$, '010010001v' 
) using '010010001' 

execute只適用於plpgsql函數。我假設你已經有了一個工作功能。