Page Comparison

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This is the hex equivalent of 1900-01-01 00:00:00. If the source date is invalid, then the target date will be: 1900.01.01 00:00:00. For an update statement where the invalid date is part of the WHERE clause, the new value of date will also be used.

In the following example END_DATE contained an invalid date value and has been changed to a valid date:

DELETE from AVI."INVALID_DATE"
where (1=1)
and PID = 101
and ORDER_NUMBER = 200
and START_DATE = 2012.09.15 15:24:26
and END_DATE = 1900.01.01 00:00:00

Invalid date with valid time component

...

set _MINE_FIX_INVALID_DATE_NEW_VALUE = 77640101FFFFFF


This value can be obtained by dumping the target columns - eg. select DUMP(START_DATE,16) from table;

This will keep the time component of the whole date but will only replace the date component with 1900.01.01. 

Here is an example. We are replicating the whole schema called AVI.

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The MINE process will have to be restarted after setting this to take affect. 

Lets create a new table on the source database:

create table invalid_date (
pid number,
order_number number,
start_date date,
end_date date
);

Now lets insert an invalid date with a correct time component into this table:

export SOURCE_TNS=d112f
sqlplus -s avi/xxx@${SOURCE_TNS}<<SQL
truncate table invalid_date;
declare
   d date;
begin
dbms_stats.convert_raw_value('64640001182e0e', d);
insert into invalid_date values (601, 200, sysdate, d);
insert into invalid_date values (701, 200, sysdate, d);
end;
/
SQL

...

sqlplus -s avi/xxx@${SOURCE_TNS}<<SQL
declare
   d date;
begin
dbms_stats.convert_raw_value('64640001162f0f', d);
update invalid_date set end_date = d where pid = 601;
end;
/
SQL

sqlplus -s avi/xxx@${SOURCE_TNS}<<SQL
alter session set nls_date_format='YYYY.DD.MM HH24:MI:SS';
select PID, END_DATE from avi.invalid_date;
SQL

PID  END_DATE
---- -------------------
 601 0000.01.00 21:46:14
 701 0000.01.00 23:45:13

TO_CHAR(END_DATE,'Y
-------------------
1900-01-01 21:46:14
1900-01-01 23:45:13
DUMP(END_DATE,16)
--------------------------------------------------------------------------------
Typ=12 Len=7: 77,64,1,1,16,2f,f
Typ=12 Len=7: 77,64,1,1,18,2e,e