（错误 1366 SQL）不正确的 DECIMAL 值“()”

Question

我正在为 WindRose 开发 SP，当我尝试运行 SP 时，SQL 向我显示此错误。

(Error 1366 SQL) Incorrect DECIMAL value '()' for column "" at row -1

这个问题是在修改了我收集数据的table之后出现的。在我为另一个 table 制作此 SP 之前它工作正常，但我必须更改 table 因为这是接收实时数据的那个。

CREATE TEMPORARY TABLE viento_count(angulo DECIMAL, val1 INT, val2 INT, val3 INT, val4 INT, val5 INT, val6 INT);
    
    myloop: LOOP
    
    IF angle > 350 THEN
        LEAVE myloop;
    END IF;

    SET angle1 = angle;
    SET angle2 = angle + 15;
    SET angle_grf = angle + 15/2;
    
    
    SET valor1 = (SELECT COUNT(*) FROM vw_wind_counter WHERE speedy <= 3 AND (device_id = codigo_estacion) AND (data_time BETWEEN fecha_consulta_first_day AND fecha_consulta_last_day) AND direccion > angle1 AND direccion <= angle2);
    SET valor2 = (SELECT COUNT(*) FROM vw_wind_counter WHERE speedy > 3 AND speedy <= 6 AND (device_id = codigo_estacion) AND (data_time BETWEEN fecha_consulta_first_day AND fecha_consulta_last_day) AND direccion > angle1 AND direccion <= angle2);
    SET valor3 = (SELECT COUNT(*) FROM vw_wind_counter WHERE speedy > 6 AND speedy <= 9 AND (device_id = codigo_estacion) AND (data_time BETWEEN fecha_consulta_first_day AND fecha_consulta_last_day) AND direccion > angle1 AND direccion <= angle2);
    SET valor4 = (SELECT COUNT(*) FROM vw_wind_counter WHERE speedy > 9 AND speedy <= 13 AND (device_id = codigo_estacion) AND (data_time BETWEEN fecha_consulta_first_day AND fecha_consulta_last_day) AND direccion > angle1 AND direccion <= angle2);
    SET valor5 = (SELECT COUNT(*) FROM vw_wind_counter WHERE speedy > 13 AND speedy <= 18 AND (device_id = codigo_estacion) AND (data_time BETWEEN fecha_consulta_first_day AND fecha_consulta_last_day) AND direccion > angle1 AND direccion <= angle2);
    SET valor6 = (SELECT COUNT(*) FROM vw_wind_counter WHERE speedy > 18 AND (device_id = codigo_estacion) AND (data_time BETWEEN fecha_consulta_first_day AND fecha_consulta_last_day) AND direccion > angle1 AND direccion <= angle2);
    
    INSERT INTO viento_count SELECT angle_grf AS angulo, valor1 AS val1, valor2 AS val2, valor3 AS val3, valor4 AS val4, valor5 AS val5, valor6 AS val6;
    
    SET angle = angle + 15;
    
    END LOOP myloop;
    
    SELECT * FROM viento_count;
    DROP TEMPORARY TABLE viento_count;

目前，我从视图 (vw_wind_counter) 获取数据，其中我 CAST 速度和方向数据为 DECIMAL 值。我看到了关于这个问题的另一个话题，但其中很多是关于错误的数据插入。

Answer 1

您似乎从未将 angle 变量初始化为 0，因此它未定义。

也就是说，您不需要变量或循环...

只要用一个table你感兴趣的不同角度，然后用条件聚合（COUNT()里面有CASE表达式）.

INSERT INTO
  viento_count (angulo, val1, val2, val3, val4, val5, val6)
SELECT
  CAST(a.angle AS DECIMAL(4,1)) + 7.5,
  COUNT(CASE WHEN                   w.speedy <= 3  THEN 1 END),
  COUNT(CASE WHEN w.speedy > 3  AND w.speedy <= 6  THEN 1 END),
  COUNT(CASE WHEN w.speedy > 6  AND w.speedy <= 9  THEN 1 END),
  COUNT(CASE WHEN w.speedy > 9  AND w.speedy <= 13 THEN 1 END),
  COUNT(CASE WHEN w.speedy > 13 AND w.speedy <= 18 THEN 1 END),
  COUNT(CASE WHEN w.speedy > 18                    THEN 1 END)
FROM
  vw_wind_counter   AS w
CROSS JOIN
(
  SELECT
    (a*5+b)*15   AS angle
  FROM
    (select 0 a union all select 1 union all select 2 union all select 3 union all select 4) t1,
    (select 0 b union all select 1 union all select 2 union all select 3 union all select 4) t2
  WHERE
    (a*5+b)*15 < 360
)
  AS a
WHERE
      w.device_id = codigo_estacion
  AND w.data_time BETWEEN fecha_consulta_first_day AND fecha_consulta_last_day
  AND w.direccion >  a.angle
  AND w.direccion <= a.angle + 15

注意：子查询只是创建一个 table 的角度，从 0 到 345，增量为 15。

另外：范围传统上是 (>= and <) 而不是 (> and <=)。例如，您当前的代码包括 direccion = 360 但 不包括 direccion = 0，这是不正常的。

（错误 1366 SQL）不正确的 DECIMAL 值“()”

(Error 1366 SQL) Incorrect DECIMAL value '()'

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