带有OR语句的SELECT

Question

我想获取以下数据：如果：Code不为NULL，我想与所有4个条件匹配：代码，接触器，类型和命名法。如果：Code为NULL，我只想匹配Contractor，Type和Nomenclature。我在这里写了一些查询

SELECT "Nomenclature" as "IdNom",
       "Cod"          as "ContrCode",
       "Contanctor"
FROM "КодНоменклатуры"

WHERE (:Code IS NOT NULL OR "Code" = ANY (:Code :: text[]))

  AND ("Contactor" = :Contractor::integer
  AND "Type" = :IsSupplier::integer
  AND "Nomenclature" IS NOT NULL)

但是它无法正常工作。当我输入代码时，它将查询与承包商，类型和术语匹配但与代码不匹配的所有内容。如果我没有输入代码，则结果是正确的，我匹配了Contractor，Type和Nomenclature。

Answer 1

SELECT "Nomenclature" AS "IdNom", "Cod" AS "ContrCode", "Contanctor"
FROM "КодНоменклатуры"
WHERE (
        :Code IS NOT NULL AND "Contactor" = :Contractor::integer AND "Type" = IsSupplier::integer AND "Nomenclature" IS NOT NULL
      ) 
      OR 
      (
        "Code" = ANY (:Code :: text[]) AND "Contactor" = :Contractor::integer
      )

Answer 2

...WHERE :Code IS NOT NULL...将始终为TRUE，只要您将内容传递给：Code。因此，OR之后的部分将不再进行评估，因为那时整个术语为TRUE。