我有一种情况，一旦测试，我需要将元数据/配置更改（存储在少数表中）从开发环境移动到生产环境。Goldengate 之类的产品就是用于此目的的产品，但设置和管理成本高且复杂。
以下过程生成一个触发器并将其附加到需要保存 DML 的表中。触发器重新创建 DML，并在以下情况下将其保存到审计表中 - 由您决定如何处理它。您可以使用保存到审计表中的语句来重播给定时间点的更改（剪切和粘贴或开发一个过程以将它们应用到目标）。
希望您觉得这个有帮助。
procedure gen_trigger( p_tname in varchar2 )
is
l_theCursor integer default dbms_sql.open_cursor;
l_query varchar2(1000) default 'select * from ' || p_tname;
l_colCnt number := 0;
l_descTbl dbms_sql.desc_tab;
trg varchar(32767) := null;
expr varchar(32767) := null;
cmd varchar(32767) := null;
begin
dbms_sql.parse( l_theCursor, l_query, dbms_sql.native );
dbms_sql.describe_columns( l_theCursor, l_colCnt, l_descTbl );
trg := q'#
create or replace trigger <%TABLE_NAME%>_audit
after insert or update or delete on <%TABLE_NAME%> for each row
declare
qs varchar2(20) := q'[q'^]';
qe varchar2(20) := q'[^']';
command clob;
nlsd varchar2(100);
begin
select value into nlsd from nls_session_parameters where parameter = 'NLS_DATE_FORMAT';
execute immediate 'alter session set nls_date_format = ''YYYY/MM/DD hh24:mi:ss'' ';
if inserting then
command := <%INSERT_COMMAND%>;
end if;
if updating then
command := <%UPDATE_COMMAND%>;
end if;
if deleting then
command := <%DELETE_COMMAND%>;
end if;
insert into x_audit values (systimestamp, command);
execute immediate q'+alter session set nls_date_format = '+'|| nlsd || q'+'+';
end;
#';
-- Create the insert command
cmd := q'#'insert into <%TABLE_NAME%> (<%INSERT_COLS%>) values ('||<%INSERT_VAL%>||')'#';
-- columns clause
for i in 1 .. l_colCnt loop
if expr is not null then
expr := expr || ',';
end if;
expr := expr || l_descTbl(i).col_name;
end loop;
cmd := replace(cmd,'<%INSERT_COLS%>',expr);
-- values clause
expr := null;
for i in 1 .. l_colCnt loop
if expr is not null then
expr := expr || q'#||','||#';
end if;
expr := expr || 'qs||:new.' || l_descTbl(i).col_name || '||qe';
end loop;
cmd := replace(cmd,'<%INSERT_VAL%>',expr);
trg := replace(trg,'<%INSERT_COMMAND%>',cmd);
-- create the update command
-- set clause
expr := null;
cmd := q'#'update <%TABLE_NAME%> set '||<%UPDATE_COLS%>||' where '||<%WHERE_CLAUSE%>#';
for i in 1 .. l_colCnt loop
if expr is not null then
expr := expr || q'#||','||#';
end if;
expr := expr || q'#'#' || l_descTbl(i).col_name || q'# = '||#'|| 'qs||:new.'||l_descTbl(i).col_name || '||qe';
end loop;
null;
cmd := replace(cmd,'<%UPDATE_COLS%>',expr);
trg := replace(trg,'<%UPDATE_COMMAND%>',cmd);
-- create the delete command
expr := null;
cmd := q'#'delete <%TABLE_NAME%> where '||<%WHERE_CLAUSE%>#';
trg := replace(trg,'<%DELETE_COMMAND%>',cmd);
-- where clause using primary key columns (used by update and delete)
expr := null;
for pk in (SELECT column_name FROM all_cons_columns WHERE constraint_name = (
SELECT constraint_name FROM user_constraints
WHERE UPPER(table_name) = UPPER(p_tname) AND CONSTRAINT_TYPE = 'P'
)) loop
if expr is not null then
expr := expr || q'#|| ' and '||#';
end if;
expr := expr || q'#'#' || pk.column_name || q'# = '||#'|| 'qs||:old.'|| pk.column_name || '||qe';
end loop;
if expr is null then -- must have a primary key
raise_application_error(-20000,'The table must have a primary key defined');
end if;
trg := replace(trg,'<%WHERE_CLAUSE%>',expr);
trg := replace(trg,'<%TABLE_NAME%>',p_tname);
execute immediate trg;
null;
exception
when others then
execute immediate 'alter session set nls_date_format=''YYYY/MM/DD'' ';
raise;
end;
/* Example
create table t1 (
col1 varchar2(100),
col2 number,
col3 date,
constraint pk_t1 primary key (col1)
)
/
BEGIN
GEN_TRIGGER('T1');
END;
/
-- Trigger generated ....
create or replace trigger t1_audit after
insert or
update or
delete on t1 for each row
declare
qs varchar2(20) := q'[q'^]';
qe varchar2(20) := q'[^']';
command clob;
nlsd varchar2(100);
begin
select value into nlsd from nls_session_parameters where parameter = 'NLS_DATE_FORMAT';
execute immediate 'alter session set nls_date_format = ''YYYY/MM/DD hh24:mi:ss'' ';
if inserting then
command := 'insert into T1 (COL1,COL2,COL3) values ('||qs||:new.col1||qe||','||qs||:new.col2||qe||','||qs||:new.col3||qe||')';
end if;
if updating then
command := 'update T1 set '||'COL1 = '||qs||:new.col1||qe||','||'COL2 = '||qs||:new.col2||qe||','||'COL3 = '||qs||:new.col3||qe||' where '||'COL1 = '||qs||:old.col1||qe;
end if;
if deleting then
command := 'delete T1 where '||'COL1 = '||qs||:old.col1||qe;
end if;
insert into x_audit values
(systimestamp, command
);
execute immediate q'+alter session set nls_date_format = '+'|| nlsd || q'+'+';
end;
*/