今天客户现场业务甩给我一个报错让处理，ora-00904:"WM_CONCAT"：标识符无效。
初步分析了下场景：
前天因为在原先一套库要删除，而他们业务用户A使用的便是该套计划删除的库，故导出A用户，导入到新环境中，expdp/impdp导入导出中均无报错。昨天在新环境给恢复成功，今天业务反映有报错，在新环境中查看确实没有该function，而老环境中有该function，但是是用户B的，猜测之前老环境是给A建立了B的synonym。
解决方法：
1、获取创建该函数的DDL语句，在新环境中直接创建该function
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SQL>
set
long 999
SQL>
select
dbms_metadata.get_ddl(
'FUNCTION'
,
'WM_CONCAT'
,
'TBCS'
)
from
dual;
DBMS_METADATA.GET_DDL(
'FUNCTION'
,
'WM_CONCAT'
,
'TBCS'
)
--------------------------------------------------------------------------------
CREATE
OR
REPLACE
EDITIONABLE
FUNCTION
"TBCS"
.
"WM_CONCAT"
(P1 VARCHAR2)
RETURN
clob AGGREGATE USING WM_CONCAT_IMPL;
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执行DDL语句
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SQL>
CREATE
OR
REPLACE
EDITIONABLE
FUNCTION
"AOPEN"
.
"WM_CONCAT"
(P1 VARCHAR2)
RETURN
clob AGGREGATE USING WM_CONCAT_IMPL;
2 /
Warning:
Function
created
with
compilation errors.
SQL>
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此操作后，明显报错了，让业务测试，肯定测不过，查看函数是无效的
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SQL>
select
OWNER,OBJECT_NAME,SUBOBJECT_NAME,OBJECT_TYPE,LAST_DDL_TIME
from
dba_objects
where
object_name=
upper
(
'wm_concat'
) ;
OWNER OBJECT_NAME SUBOBJECT_NAME OBJECT_TYPE LAST_DDL_TIME
-------------------- ------------------------------ ------------------------------ ----------------------- ---------------
A WM_CONCAT
FUNCTION
20191121 172355
SQL>
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2、导出function在导入新环境
由于第一种方法不行，故考虑第二种方法，把老环境B用户的wm_concat函数迁移到新环境，测试可行否
导出function
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expdp \
'/ as sysdba \' directory=expdp_2019 dumpfile=function_wm_concat_20191121.dmp logfile=function_wm_concat_expdp_20191121.log schemas=B include=function:\"IN \'WM_CONCAT\'\"
Export: Release 12.1.0.2.0 - Production on Thu Nov 21 17:46:38 2019
Copyright (c) 1982, 2014, Oracle and/or its affiliates. All rights reserved.
Connected to: Oracle Database 12c Enterprise Edition Release 12.1.0.2.0 - 64bit Production
With the Partitioning, Automatic Storage Management, OLAP, Advanced Analytics
and Real Application Testing options
Starting "SYS"."SYS_EXPORT_SCHEMA_02": "/******** AS SYSDBA" directory=expdp_2019 dumpfile=function_wm_concat_20191121.dmp logfile=function_wm_concat_expdp_20191121.log schemas=B include=function:"IN '
WM_CONCAT'
"
Estimate in progress using BLOCKS method...
Total estimation using BLOCKS method: 0 KB
Processing object type SCHEMA_EXPORT/FUNCTION/FUNCTION
Processing object type SCHEMA_EXPORT/FUNCTION/ALTER_FUNCTION
Master table "
SYS
"."
SYS_EXPORT_SCHEMA_02
" successfully loaded/unloaded
******************************************************************************
Dump file set for SYS.SYS_EXPORT_SCHEMA_02 is:
/ora12c/oracle/dir_dump/function_wm_concat_20191121.dmp
Job "
SYS
"."
SYS_EXPORT_SCHEMA_02" successfully completed
at
Thu Nov 21 17:47:27 2019 elapsed 0 00:00:47
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导入新环境，使用户转换，由B转换为A
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impdp \'/
as
sysdba \' directory=DIR_DUMP dumpfile=function_wm_concat_20191121.dmp logfile=function_wm_concat_impdp_20191121.log remap_schema=B:A
Import: Release 12.1.0.2.0 - Production
on
Thu Nov 21 17:48:53 2019
Copyright (c) 1982, 2014, Oracle
and
/
or
its affiliates.
All
rights reserved.
Connected
to
: Oracle
Database
12c Enterprise Edition Release 12.1.0.2.0 - 64bit Production
With
the Partitioning, Automatic Storage Management, OLAP, Advanced Analytics
and
Real
Application Testing options
Master
table
"SYS"
.
"SYS_IMPORT_FULL_01"
successfully loaded/unloaded
Starting
"SYS"
.
"SYS_IMPORT_FULL_01"
:
"/******** AS SYSDBA"
directory=DIR_DUMP dumpfile=function_wm_concat_20191121.dmp logfile=function_wm_concat_impdp_20191121.log remap_schema=B:A
Processing object type SCHEMA_EXPORT/
FUNCTION
/
FUNCTION
Processing object type SCHEMA_EXPORT/
FUNCTION
/ALTER_FUNCTION
ORA-39082: Object type
FUNCTION
:
"AOPEN"
.
"WM_CONCAT"
created
with
compilation warnings
Job
"SYS"
.
"SYS_IMPORT_FULL_01"
completed
with
1 error(s)
at
Thu Nov 21 17:49:00 2019 elapsed 0 00:00:05
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查看函数状态，依旧invalid
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SQL>
select
owner,object_name,object_type ,status
from
dba_objects
where
owner
not
in
(
'SYS'
,
'SYSTEM'
)
AND
status !=
'VALID'
;
OWNER OBJECT_NAME OBJECT_TYPE STATUS
------------------------------ ------------------------------ ----------------------- -------
A WM_CONCAT
FUNCTION
INVALID
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3、手工创建该函数
考虑到第一种方法只是创建了function，而包体等内容并没有创建，故手工创建package、body、function
a、以sys用户创建包、包体、函数
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CREATE
OR
REPLACE
TYPE WM_CONCAT_IMPL
AS
OBJECT
(
CURR_STR VARCHAR2(32767),
STATIC
FUNCTION
ODCIAGGREGATEINITIALIZE(SCTX
IN
OUT
WM_CONCAT_IMPL)
RETURN
NUMBER,
MEMBER
FUNCTION
ODCIAGGREGATEITERATE(SELF
IN
OUT
WM_CONCAT_IMPL,
P1
IN
VARCHAR2)
RETURN
NUMBER,
MEMBER
FUNCTION
ODCIAGGREGATETERMINATE(SELF
IN
WM_CONCAT_IMPL,
RETURNVALUE
OUT
VARCHAR2,
FLAGS
IN
NUMBER)
RETURN
NUMBER,
MEMBER
FUNCTION
ODCIAGGREGATEMERGE(SELF
IN
OUT
WM_CONCAT_IMPL,
SCTX2
IN
WM_CONCAT_IMPL)
RETURN
NUMBER
);
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b、创建类型body
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CREATE
OR
REPLACE
TYPE BODY WM_CONCAT_IMPL
IS
STATIC
FUNCTION
ODCIAGGREGATEINITIALIZE(SCTX
IN
OUT
WM_CONCAT_IMPL)
RETURN
NUMBER
IS
BEGIN
SCTX := WM_CONCAT_IMPL(
NULL
) ;
RETURN
ODCICONST.SUCCESS;
END
;
MEMBER
FUNCTION
ODCIAGGREGATEITERATE(SELF
IN
OUT
WM_CONCAT_IMPL,
P1
IN
VARCHAR2)
RETURN
NUMBER
IS
BEGIN
IF(CURR_STR
IS
NOT
NULL
)
THEN
CURR_STR := CURR_STR ||
','
|| P1;
ELSE
CURR_STR := P1;
END
IF;
RETURN
ODCICONST.SUCCESS;
END
;
MEMBER
FUNCTION
ODCIAGGREGATETERMINATE(SELF
IN
WM_CONCAT_IMPL,
RETURNVALUE
OUT
VARCHAR2,
FLAGS
IN
NUMBER)
RETURN
NUMBER
IS
BEGIN
RETURNVALUE := CURR_STR ;
RETURN
ODCICONST.SUCCESS;
END
;
MEMBER
FUNCTION
ODCIAGGREGATEMERGE(SELF
IN
OUT
WM_CONCAT_IMPL,
SCTX2
IN
WM_CONCAT_IMPL)
RETURN
NUMBER
IS
BEGIN
IF(SCTX2.CURR_STR
IS
NOT
NULL
)
THEN
SELF.CURR_STR := SELF.CURR_STR ||
','
|| SCTX2.CURR_STR ;
END
IF;
RETURN
ODCICONST.SUCCESS;
END
;
END
;
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c、创建函数
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CREATE
OR
REPLACE
FUNCTION
wm_concat(P1 VARCHAR2)
RETURN
VARCHAR2 AGGREGATE USING WM_CONCAT_IMPL ;
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d、创建同义词并授权
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create
public
synonym WM_CONCAT_IMPL
for
sys.WM_CONCAT_IMPL
create
public
synonym wm_concat
for
sys.wm_concat
grant
execute
on
WM_CONCAT_IMPL
to
public
grant
execute
on
wm_concat
to
public
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然后查看function状态，正常状态。至此问题解决。
总结
1、从网上找资料了解到，11gr2和12C上已经摒弃了wm_concat函数，而应用在程序中确使用了该函数，导致程序出现错误，为了减轻程序员修改程序的工作量，只有通过手工创建个wm_concat函数，来临时解决该问题，但是注意，及时创建了该函数，在使用的过程中，也需要用to_char(wm_concat())方式，才能完全替代之前的应用。
2、也查到了说VMSYS用户下有该函数，但是默认该用户是锁定的，此次问题我也解锁了VMSYS用户，但是并无该function
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SQL>
alter
user
WMSYS account unlock;
User
altered.
SQL>
select
owner,object_name,object_type
from
dba_objects
where
owner=
'WMSYS'
and
object_type =
'FUNCTION'
;
no
rows
selected
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3、手工重建，保留脚本以后出现类似问题可以很快速重建。