Hi, Yes true. I agree with you.
I am porting my application from oracle to postgresql. in oracle it enters as NULL and hence this problem was not faced. Now my problem is that my bind variables are of string type and when the get a NULL value is converts it into an empty string in C++ programming. Example: insert into check_date values (to_date(:h1,'yyyymmddhh24miss'),1,to_date(:h2,'yyyymmddhh24miss')); now h1 and h2 are of string datatype in my c++ program. If no value is there, it is passed on as a empty string into my query. How can I handle this to enter NULL values? Thanks & Regards Medhavi Mahansaria Tata Consultancy Services Limited Unit-VI, No.78, 79& 83, L-Centre, EPIP Industrial Estate, Whitefield Bangalore - 560066,Karnataka India Ph:- +91 80 67253769 Cell:- +91 9620053040 Mailto: medhavi.mahansa...@tcs.com Website: http://www.tcs.com ____________________________________________ Experience certainty. IT Services Business Solutions Consulting ____________________________________________ From: Bill Moran <wmo...@potentialtech.com> To: Medhavi Mahansaria <medhavi.mahansa...@tcs.com> Cc: pgsql-general@postgresql.org Date: 03/06/2015 03:36 PM Subject: Re: [GENERAL] #PERSONAL# Reg: date going as 01/01/0001 On Fri, 6 Mar 2015 15:24:28 +0530 Medhavi Mahansaria <medhavi.mahansa...@tcs.com> wrote: > Hi Bill, > > Here are the details of the table and the query i want to insert. > > > aml_db=> \d+ check_date > Table "public.check_date" > Column | Type | Modifiers | Storage | Stats > target | Description > -----------+-----------------------------+-----------+---------+--------------+------------- > some_date | date | | plain | | > sno | integer | | plain | | > new_date | timestamp without time zone | | plain | | > Has OIDs: no > > > aml_db=> select * from check_date; > some_date | sno | new_date > -----------+-----+---------- > (0 rows) > > > aml_db=> insert into check_date values > (to_date('','yyyymmddhh24miss'),1,to_date('','yyyymmddhh24miss')); > INSERT 0 1 > aml_db=> select * from check_date; > some_date | sno | new_date > ---------------+-----+------------------------ > 01/01/0001 BC | 1 | 01/01/0001 00:00:00 BC > (1 row) > > > I need to enter NULL as my date. but since I am getting these variables > into the bind variables as empty string that is this issue is happening. You're not inserting null, so it's hard to expect null to be the result. Try: INSERT INTO check_date VALUES (null, 1, null); or even: INSERT INTO check_date VALUES (to_date(null, 'yyyymmddhh24miss'), 1, to_date(null, 'yyyymmddhh24miss')); both of which result in what you desire. null and the empty string are not the same thing. -- Bill Moran =====-----=====-----===== Notice: The information contained in this e-mail message and/or attachments to it may contain confidential or privileged information. If you are not the intended recipient, any dissemination, use, review, distribution, printing or copying of the information contained in this e-mail message and/or attachments to it are strictly prohibited. If you have received this communication in error, please notify us by reply e-mail or telephone and immediately and permanently delete the message and any attachments. Thank you
