AWS RDS PostgreSQL 9.5.4 扩展 postgis_tiger_geocoder 缺少 Soundex？

Question

我正在尝试在我们的大型 RDS 实例上安装 AWS“已批准”PostgreSql 扩展，但每次我尝试“创建扩展 postgis_tiger_geocoder”时都会得到以下信息：

SQL 错误 [42883]：错误：函数 soundex（字符变化）不存在

我花了很多时间阅读 AWS / postgis / postgresql 论坛，但遗憾的是没有找到墙上的文字。

采取的步骤

安装了 POSTGIS 扩展

create EXTENSION postgis; 

安装了包含 soundex 函数的 FuzzyStrMatch 扩展（已验证）

create EXTENSION fuzzystrmatch; 

最后，当我运行这个创建扩展时，我得到了上面的错误

create extension postgis_tiger_geocoder;
SQL Error [42883]: ERROR: function soundex(character varying) does not exist
Hint: No function matches the given name and argument types. You might need to add explicit type casts.
Position: 57558
org.postgresql.util.PSQLException: ERROR: function soundex(character varying) does not exist
Hint: No function matches the given name and argument types. You might need to add explicit type casts.
Position: 57558

我尝试过的事情：

set search_path = <schema_name>, public

关注这里： Installing PostgreSQL Extension to all schemas 深入挖掘 postgis 安装文档 阅读有关添加扩展的 RDS 文档...

如果有人不得不在 AWS 上处理这种挫败感，我会很乐意交换我头上剩下的一些头发，因为我无法解决这个问题。

\dx+的结果

                      Objects in extension "fuzzystrmatch"
                               Object Description
--------------------------------------------------------------------------------
 function <schema>.difference(...)
 function <schema>.dmetaphone_alt(...)
 function <schema>.dmetaphone(...)
 function <schema>.levenshtein_less_equal(...)
 function <schema>.levenshtein_less_equal(...)
 function <schema>.levenshtein(...)
 function <schema>.levenshtein(...)
 function <schema>.metaphone(...)
 function <schema>.soundex(...)
 function <schema>.text_soundex(...)
(10 rows)

\dfS+ soundex 的结果

                                                                       List of functions
 Schema | Name | Result data type | Argument data types | Type | Volatility | Owner | Security | Access privileges | Language | Source code | Description
--------+------+------------------+---------------------+------+------------+-------+----------+-------------------+----------+-------------+-------------
(0 rows)

Answer 1

遇到同样的问题，通过更改数据库的 search_path 并在创建扩展 postgis_tiger_geocoder 之前重新连接来解决它。寻找 FIX 部分：

-- Postgis Installation
------------------------------------------------------------------------------------------------------------------------------------------------
-- PostGIS AWS Configuration                                                                                                                  --
-- https://docs.aws.amazon.com/AmazonRDS/latest/UserGuide/Appendix.PostgreSQL.CommonDBATasks.html#Appendix.PostgreSQL.CommonDBATasks.PostGIS  --
------------------------------------------------------------------------------------------------------------------------------------------------
-- On postgis schema
SET SCHEMA '${POSTGIS_SCHEMA_NAME}';
-- Step 2: Load the PostGIS Extensions
create extension postgis;
create extension fuzzystrmatch;
-- FIX : To avoid "ERROR:  function soundex(character varying) does not exist", change schema and reconnect
ALTER DATABASE ${DATABASE_NAME} SET search_path=${POSTGIS_SCHEMA_NAME};
\connect ${DATABASE_NAME};
-- End FIX
create extension postgis_tiger_geocoder;
create extension postgis_topology;
-- Step 3: Transfer Ownership of the Extensions to the rds_superuser Role
alter schema tiger owner to ${MASTER_USER};
alter schema tiger_data owner to ${MASTER_USER};
alter schema topology owner to ${MASTER_USER};
-- Step 4: Transfer Ownership of the Objects to the rds_superuser Role
CREATE FUNCTION exec(text) returns text language plpgsql volatile AS $f$ BEGIN EXECUTE $1; RETURN $1; END; $f$;
SELECT exec('ALTER TABLE ' || quote_ident(s.nspname) || '.' || quote_ident(s.relname) || ' OWNER TO ${MASTER_USER};')
  FROM (
    SELECT nspname, relname
    FROM pg_class c JOIN pg_namespace n ON (c.relnamespace = n.oid)
    WHERE nspname in ('tiger','topology') AND
    relkind IN ('r','S','v') ORDER BY relkind = 'S')
s;

-- Adding postgis to default schema
ALTER DATABASE ${DATABASE_NAME} SET search_path=${SCHEMA_NAME},${POSTGIS_SCHEMA_NAME};

Answer 2

遇到了同样的问题。事实证明，fuzzystrmatch 的所有函数都是在错误的模式中创建的。

连接psql命令行，我使用drop extension命令重新启动创建扩展的过程：

drop extension postgis_topology;
drop extension postgis;
drop extension fuzzystrmatch;

然后，可以肯定的是，使用\q 断开连接。

再次连接psql。

将架构设置为公开：

set schema 'public';

然后，按照AWS RDS Docs中描述的流程进行

create extension postgis;
create extension fuzzystrmatch;
create extension postgis_tiger_geocoder;
create extension postgis_topology;