一.Rules Manager 和 Expression Filter 组件说明


在说明之前,我们先用如下SQL查看一下DB中的组件:

SQL> col comp_id for a15

SQL> col version for a15

SQL> col comp_name for a30

SQL> select comp_id,comp_name,versionfrom dba_registry ;


COMP_ID         COMP_NAME                      VERSION

--------------------------------------------- ---------------

XDB             Oracle XML Database            11.2.0.3.0

AMD             OLAP Catalog                   11.2.0.3.0

EM              Oracle Enterprise Manager      11.2.0.3.0

SDO             Spatial                        11.2.0.3.0

ORDIM           Oracle Multimedia              11.2.0.3.0

CONTEXT         Oracle Text                    11.2.0.3.0

ODM             Oracle Data Mining             11.2.0.3.0

EXF             Oracle Expression Filter       11.2.0.3.0

RUL             Oracle Rules Manager           11.2.0.3.0

OWM             Oracle Workspace Manager       11.2.0.3.0

CATALOG         Oracle Database Catalog Views  11.2.0.3.0


COMP_ID         COMP_NAME                      VERSION

--------------------------------------------- ---------------

CATPROC         Oracle Database Packages and T11.2.0.3.0

                ypes


JAVAVM          JServer JAVA Virtual Machine   11.2.0.3.0

XML             Oracle XDK                     11.2.0.3.0

CATJAVA         Oracle Database Java Packages  11.2.0.3.0

XOQ             Oracle OLAP API                11.2.0.3.0

APS             OLAP Analytic Workspace        11.2.0.3.0


17 rows selected.


MOS:

Oracle 8i/9i/10g/11g 组件(Components) 说明

javascript:void(0)


The 10i newfeature allows you to store conditional expressions as data in the database.The Expression Filter provides a mechanism that you use to place a constrainton a VARCHAR2 column to ensure that the values stored are valid SQL WHEREclause expressions. The mechanism also identifies the set of attributes thatcan be referenced in the conditional expressions. 

--Oracle 10g的一个新特性就是允许我们在数据库中用data的方式存储条件表达式。 Expression Filter 组件提供了机制,通过这个机制,我们可以在Varchar2类型的列上添加约束,来确保存储有效的SQL Where 条件表达式。这个机制也可以标记一个属性的集合,其可以用来在条件表达式中参考。


OracleExpression Filter, a feature of Oracle Database 10g, is a component of RulesManager that allows application developers to store, index, and evaluateconditional expressions (expressions) in one or more columns of a relationaltable. Expressions are a useful way to describe interests in expected data. 

--Expression Filter 是Rules Manager 的一个组件。其允许研发人员store,index 和 evaluate 条件表达式在相关表的一个或多个列上。


ExpressionFilter matches incoming data with expressions stored in a column to identifyrows of interest. It can also derive complex relationships by matching data inone table with expressions in a second table. Expression Filter simplifies SQLqueries; allows expressions to be inserted, updated, and deleted withoutchanging the application; and enables reuse of conditional expressions in rulesby separating them from the application and storing them in the database.Applications involving information distribution, demand analysis, and taskassignment can benefit from Expression Filter. 

--Expression Filter 使用存在列里的表达式来匹配输入的数据。 ExpressionFilter 简化了SQL 查询,允许表达式进行insert,update和delete 操作而不用改变应用程序。


The RulesManager and Expression Filter features are the same in the Standard andEnterprise Editions. Support for indexing expressions is available only in theEnterprise Edition because it requires bitmap index support. 


组件用户:

EXFSYS: 

Each is suppliedas a set of PL/SQL packages, a Java package, a set of dictionary tables, andcatalog views. All these objects are created in a dedicated schema namedEXFSYS. 


官网说明:

​OracleExpression Filter Concepts 10gR2​



二.组件重建

MOS:

Note 258618.1 - How To Install andUninstall Expression Filter Feature or EXFSYS schema


官网:

​Installing Rules Managerand Expression Filter 11gR2​

http://docs.oracle.com/cd/E11882_01/appdev.112/e14919/exprn_app_e.htm">​http://docs.oracle.com/cd/E11882_01/appdev.112/e14919/exprn_app_e.htm​



2.1 Installing the EXFSYS schema: 


1. Login as SYSDBA 


2. @?/rdbms/admin/catexf.sql 


注意:

1. Installing Expression Filter does notautomatically install Rules Manager. 

    This component has to be installed separately using thecatrul.sql script

--安装Expression Filter 不会自动安装Rules Manager。所有RulesManager 需要使用catrul.sql 独立安装。

2. When reinstalling Expression Filter, you may have to run utlrp.sql torecompile some invalid objects.

       --在卸载Expression Filter 时,需要使用urlrp.sql 来编译一些无效对象。


During installation of OracleDatabase, a demonstration script is installed for both the Rules Manager and Expression Filter features. The scripts ruldemo.sql (Rules Manager demo) andexfdemo.sql (Expression Filter demo) are located in the$ORACLE_HOME/rdbms/demo/ directory. 



2.2 Uninstalling the EXFSYS schema: 

1. Login as SYSDBA 


2. @?/rdbms/admin/catnoexf.sql 


注意:

1. Uninstalling Expression Filter implicitly uninstalls Rules Manager.

       --卸载Expression Filter 组件时会自动卸载Rules Manager 组件。


2. The CATNOEXF.SQL script may not droppublic synonyms created by catexf.sql.

    However, with 11.2, it was verified no PUBLIC SYNONYMS fortable_owner = 'EXFSYS' were left.

       --catnoexf.sql 脚本不会删除由catexf.sql 产生的公共同义词。但是从Oracle 11gR2 开始,它会验证是否有public sysnonyms的存在。


The followingscript can be used to drop all PUBLIC SYNONYMS created for Rules Manager andExpression Filter when needed:

       --如下脚本可以删除所有EXFSYS 用户的PUBLIC SYNONYMS:


declare 

  cursor cur1 is select synonym_name from all_synonyms where owner ='PUBLIC' and table_owner = 'EXFSYS'; 

begin 

  for c1 in cur1 loop 

    EXECUTE IMMEDIATE 'drop public synonym ' ||dbms_assert.enquote_name(c1.synonym_name, false); 

  end loop; 

end; 

/


In someversions before 10.2, or if you do not have the dbms_assert package, thefollowing script can be used instead: 

--在Oracle 10gR2 之前,如果没有dbms_assert 包,那么可以使用如下的脚本来删除PUBLIC SYNONYMS:


declare

  cursor cur1 is select synonym_name from all_synonyms where owner ='PUBLIC' and table_owner = 'EXFSYS';

begin

  for c1 in cur1 loop

    EXECUTE IMMEDIATE 'drop public synonym"'||c1.synonym_name||'"';

  end loop;

end;


Thefollowing is a list of the public synonyms that may remain after justrunning CATNOEXF.SQL and these would be dropped by running one of the abovescripts:

--catanoexf.sql 不能删除的public synonyms列表如下:

EXF$INDEXOPER 

EXF$ATTRIBUTE 

EXF$ATTRIBUTE_LIST 

EXF$TABLE_ALIAS 

EXF$XPATH_TAG 

EXF$XPATH_TAGS 

EVALUATE 

DBMS_EXPFIL 

USER_EXPFIL_ATTRIBUTE_SETS 

ALL_EXPFIL_ATTRIBUTE_SETS 

USER_EXPFIL_ATTRIBUTES 

ALL_EXPFIL_ATTRIBUTES 

USER_EXPFIL_DEF_INDEX_PARAMS 

ALL_EXPFIL_DEF_INDEX_PARAMS 

USER_EXPFIL_INDEX_PARAMS 

ALL_EXPFIL_INDEX_PARAMS 

USER_EXPFIL_ASET_FUNCTIONS 

ALL_EXPFIL_ASET_FUNCTIONS 

USER_EXPFIL_INDEXES 

ALL_EXPFIL_INDEXES 

USER_EXPFIL_PREDTAB_ATTRIBUTES 

ALL_EXPFIL_PREDTAB_ATTRIBUTES 

USER_EXPFIL_EXPRESSION_SETS 

ALL_EXPFIL_EXPRESSION_SETS 

USER_EXPFIL_PRIVILEGES 

USER_EXPFIL_EXPRSET_STATS

ALL_EXPFIL_EXPRSET_STATS

RLM$EVENTIDS 

RLM$TABLE_ALIAS 

DBMS_RLMGR 

USER_RLMGR_EVENT_STRUCTS 

ALL_RLMGR_EVENT_STRUCTS 

USER_RLMGR_RULE_CLASSES 

ALL_RLMGR_RULE_CLASSES 

USER_RLMGR_RULE_CLASS_STATUS 

ALL_RLMGR_RULE_CLASS_STATUS 

USER_RLMGR_PRIVILEGES 

ADM_RLMGR_PRIVILEGES 

USER_RLMGR_COMPRCLS_PROPERTIES 

ALL_RLMGR_COMPRCLS_PROPERTIES 

USER_RLM4J_EVENT_STRUCTS

USER_RLM4J_RULE_CLASSES







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