将PostgreSQL查询存储到变量中

我正在实现搜索功能，这将为过滤功能提供结果

是否可以将中间执行结果存储到变量中，并根据函数提供的参数进行选择

我目前被困在这个实现上：

CREATE FUNCTION public.search_companies4(
    head_country_id bigint DEFAULT NULL::bigint,
    name character varying DEFAULT NULL::character varying,
    "categoryIds" integer[] DEFAULT NULL::integer[],
    "cityIds" integer[] DEFAULT NULL::integer[],
    departments public.department[] DEFAULT NULL::public.department[],
    "stockTemperatures" public.stock_temperature[] DEFAULT NULL::public.stock_temperature[],
    verified boolean DEFAULT NULL::boolean,
    with_comments boolean DEFAULT NULL::boolean
)
RETURNS SETOF public.company
LANGUAGE plpgsql STABLE
AS $$
    declare
        "companies" public.company;
    begin
      if ("search_companies4"."cityIds" is not null) then
          select into "companies" from "companies" AS c
          left join "companyCities" cC ON c.id = cC."companyId"
          where "search_companies4"."cityIds" @> array[cC."cityId"];
      end if;

      if ("search_companies4"."categoryIds" is not null) then
          select into "companies" from "companies" AS c
          left join "companyCategories" cCat ON c.id = cCat."companyId"
          where (
              "search_companies4"."categoryIds" @> array[cCat."categoryId"]
          ) AND (
              "search_companies4"."departments" is null OR
              "search_companies4"."departments" @> array[cCat.department]
          );
      end if;

      if ("search_companies4"."name" is not null) then
          select into "companies" from "companies" AS c
          where c.name ILIKE "search_companies4"."name";
      end if;

      if ("search_companies4"."head_country_id" is not null) then
          select into "companies" from "companies" AS c
          where c.head_country_id = "search_companies4"."head_country_id";
      end if;

      if ("search_companies4"."stockTemperatures" is not null) then
          select into "companies" from "companies" AS c
          where c."stockTemperatures" && "search_companies4"."stockTemperatures";
      end if;

      if ("search_companies4"."verified" is not null) then
          select into "companies" from "companies" AS c
          left join company_import ci ON c.id = ci.company_id
          where (
              CASE WHEN "search_companies4"."verified" = true THEN
              -- Созданные вручную и проверенные импортированные
              ci.company_id is null OR ci.verified_at is not null
              ELSE true END -- И созданные вручную и все импортированные
          );
      end if;

      if ("search_companies4"."with_comments" is not null) then
          select into "companies" from "companies" AS c
          where (
              CASE WHEN "search_companies4"."with_comments" = true THEN
              -- Только компании с комментариями
              c."lastCommentAt" IS NOT NULL
              ELSE true END
          );
      end if;

      return query select from "companies" order by id;
  end;
$$;

它不起作用，因为PostgreSQL抱怨

公司

变量：

ERROR:  relation "companies" does not exist at character 30
QUERY:  select                  from "companies" AS c
left join "companyCategories" cCat ON c.id = cCat."companyId"
where (
    "search_companies4"."categoryIds" @> array[cCat."categoryId"]
) AND (
    "search_companies4"."departments" is null OR
    "search_companies4"."departments" @> array[cCat.department]
)

如何使用此变量存储可与

select

语句一起逐步使用的查询

---

或者，是否有更好的实现…

您需要一个临时表，您不能在与您的问题无关的变量中这样做，但是：您应该真正避免那些可怕的带引号的标识符。他们的麻烦远比他们值得的多。