同义词使用案例

--创建表（PUB_SYSLOG）

create table PUB_SYSLOG

(

logid VARCHAR2(36) not null,

requestuser VARCHAR2(20),

requesttime DATE not null,

requestip VARCHAR2(20) not null,

requesturl VARCHAR2(500),

requestmethod VARCHAR2(100),

requestparam VARCHAR2(4000),

requestresult VARCHAR2(4000),

logtype VARCHAR2(110),

requestmethodnote VARCHAR2(4000)

);

--创建表（PUB_SYSLOG_BACKUP）

create table PUB_SYSLOG_BACKUP

(

logid VARCHAR2(36) not null,

requestuser VARCHAR2(20),

requesttime DATE not null,

requestip VARCHAR2(20) not null,

requesturl VARCHAR2(500),

requestmethod VARCHAR2(100),

requestparam VARCHAR2(4000),

requestresult VARCHAR2(4000),

logtype VARCHAR2(110),

requestmethodnote VARCHAR2(4000)

);

-- Add comments to the table

comment on table PUB_SYSLOG_BACKUP

is '日志备份';

-- Create/Recreate primary, unique and foreign key constraints

alter table PUB_SYSLOG_BACKUP

add constraint PK_LOGBACK primary key (LOGID);

--创建视图（关联日志表和日志备份表）

create or replace view pub_syslogview as

select "LOGID","REQUESTUSER","REQUESTTIME","REQUESTIP","REQUESTURL","REQUESTMETHOD","REQUESTPARAM","REQUESTRESULT","LOGTYPE","REQUESTMETHODNOTE" from pub_syslog

union ALL

select "LOGID","REQUESTUSER","REQUESTTIME","REQUESTIP","REQUESTURL","REQUESTMETHOD","REQUESTPARAM","REQUESTRESULT","LOGTYPE","REQUESTMETHODNOTE" from pub_syslog_backup;

--创建同义词（基于视图的同义词）

create or replace synonym PUB_SYSLOG_BACK

for PUB_SYSLOGVIEW;

--备份系统日志（存储过程，定时调用）

create or replace procedure backup_pub_syslog is

begin

insert into pub_syslog_backup

(logid,

requestuser,

requesttime,

requestip,

requesturl,

requestmethod,

requestparam,

requestresult,

logtype,

requestmethodnote)

select slog.logid,

slog.requestuser,

slog.requesttime,

slog.requestip,

slog.requesturl,

slog.requestmethod,

slog.requestparam,

slog.requestresult,

slog.logtype,

slog.requestmethodnote

from pub_syslog slog;

 

delete pub_syslog;

 

end backup_pub_syslog;

--调用备份日志存储过程

call backup_pub_syslog();

commit;

--查询操作日志

select * from PUB_SYSLOG_BACK;