Java PostgreSQL。通过具有特定id的属性列表搜索值

我需要通过特定属性搜索对象。我有一个表项_属性：

项目\属性项目\属性\类型\ fk项目\ fk值\文本 等

我试过这个：

SELECT item,name,sale_price,producer,producer_code,store_price,I.type_name 
FROM ((item INNER JOIN unit_type ON unit_type_fk=unit_type) 
INNER JOIN item_store ON item=item_fk)AS I 
INNER JOIN item_attribute AS A ON I.item=A.item_fk 
WHERE store_price BETWEEN 200.0 AND 300.0 
AND (UPPER(value_text) LIKE UPPER('%b%') AND item_attribute_type_fk=1) 
AND (UPPER(value_text) LIKE UPPER('%2%') AND item_attribute_type_fk=4) 
GROUP BY item,I.type_name ORDER BY item

结果应该是行，其中item_fk=1，但实际上select返回零行。如果我将属性之间的

和

更改为

或

，将产生多行，这并不是我想要的，因为搜索只需要返回用户在搜索字段中键入的具有所有属性的对象。我应该如何更改代码，使其仅通过具有特定项_attribute _type _fk的属性查找值，并返回具有所有这些属性的带有对象的行？

您似乎正在使用架构

要在EAV中查询多个值，必须多次加入同一个表。e、 g

SELECT item,name,sale_price,producer,producer_code,store_price,I.type_name 
FROM 
  item 
  INNER JOIN unit_type ON unit_type_fk=unit_type
  INNER JOIN item_store ON item=item_fk)AS I 
  INNER JOIN item_attribute AS a1 ON I.item = a1.item_fk 
  INNER JOIN item_attribute AS a2 ON I.item = a2.item_fk   -- note second join
WHERE store_price BETWEEN 200.0 AND 300.0 
  AND (UPPER(a1.value_text) LIKE UPPER('%b%') AND a1.item_attribute_type_fk=1) 
  AND (UPPER(a2.value_text) LIKE UPPER('%2%') AND a2.item_attribute_type_fk=4) 
GROUP BY item, I.type_name
ORDER BY item

考虑将属性转换为使用

json

或

hstore

。质疑的痛苦要小得多

SELECT item,name,sale_price,producer,producer_code,store_price,I.type_name 
FROM 
  item 
  INNER JOIN unit_type ON unit_type_fk=unit_type
  INNER JOIN item_store ON item=item_fk)AS I 
  INNER JOIN item_attribute AS a1 ON I.item = a1.item_fk 
  INNER JOIN item_attribute AS a2 ON I.item = a2.item_fk   -- note second join
WHERE store_price BETWEEN 200.0 AND 300.0 
  AND (UPPER(a1.value_text) LIKE UPPER('%b%') AND a1.item_attribute_type_fk=1) 
  AND (UPPER(a2.value_text) LIKE UPPER('%2%') AND a2.item_attribute_type_fk=4) 
GROUP BY item, I.type_name
ORDER BY item