Postgres 9.3，hstore 1.1，未知运算符'?'

Question

我有一个使用hstore收集表更改的日志表。类似于:

CREATE TABLE "gt_wells"."log_edits" (
      "well_gid"    SERIAL
    , "modified_by" TEXT
    , "edit"        HSTORE
);

，其中"edit"是记录先前值和新值之间的差值。

我想选择一个特定列被编辑的行，所以使用我的登录角色和超级用户权限，我可以成功地运行:

SELECT DISTINCT "well_gid"
FROM "gt_wells"."log_edits"
WHERE "edit" ? 'full_sized_class;

但是当我从另一个角色运行它时，我得到一个未知的操作符错误:

SET ROLE "inl-trigger";
SELECT DISTINCT "well_gid"
FROM "gt_wells"."log_edits"
WHERE "edit" ? 'full_sized_class' AND "modified_by" != 'inl-trigger';
RESET ROLE;
Error : ERROR:  operator does not exist: public.hstore ? unknown
LINE 3: WHERE "edit" ? 'full_sized_class' AND "modified_by" != 'inl-...
                     ^
HINT:  No operator matches the given name and argument type(s). You might need to add explicit type casts.

将' full_size_class '转换为TEXT没有帮助。hstore扩展存在于数据库中，我已经给了"inl-trigger"特权的hstore类型:

CREATE EXTENSION hstore;
Error : ERROR:  extension "hstore" already exists
GRANT ALL ON TYPE hstore TO "inl-trigger";
Affected rows : 0, Time: 0.00sec

如果我将"inl-trigger"设置为超级用户，一切都按预期工作。我错过了什么特权?为什么"inl-trigger"不能使用hstore操作符?

Answer 1

模式hstore所需的使用已安装到:

GRANT USAGE ON SCHEMA public TO "inl-trigger";