Re: [sqlite] Can't insert timestamp field with value CURRENT_TIME
You can probably do it the hard way: create a new table with the structure you need, then populate it with data from your old table, then rename both tables. -Original Message- From: Dan [mailto:[EMAIL PROTECTED] Sent: Tuesday, September 30, 2008 11:53 PM To: General Discussion of SQLite Database Subject: Re: [sqlite] Can't insert timestamp field with value CURRENT_TIME On Sep 27, 2008, at 7:13 AM, Mark Wyszomierski wrote: Hi, I'm trying to add a timestamp field to an existing table using the following statement: ALTER TABLE test ADD COLUMN lunchtime TIMESTAMP NOT NULL DEFAULT CURRENT_TIME this fails with the following error: Cannot add a column with non-constant default Ok that makes sense - but why can we CREATE a table with a timestamp field whose default is CURRENT_TIME, but not alter one with that as the default value? I may be misusing the syntax - SQLite doesn't modify the underlying table structure when you add a column using ALTER TABLE. So after the ALTER TABLE is executed, the existing rows now contain one value less than the table has columns. When SQLite reads the table, it detects the short row and returns the default column value in place of any missing values. This wouldn't work with something like CURRENT_TIME. Thanks, Mark ___ sqlite-users mailing list sqlite-users@sqlite.org http://sqlite.org:8080/cgi-bin/mailman/listinfo/sqlite-users ___ sqlite-users mailing list sqlite-users@sqlite.org http://sqlite.org:8080/cgi-bin/mailman/listinfo/sqlite-users
Re: [sqlite] Can't insert timestamp field with value CURRENT_TIME
On Sep 27, 2008, at 7:13 AM, Mark Wyszomierski wrote: Hi, I'm trying to add a timestamp field to an existing table using the following statement: ALTER TABLE test ADD COLUMN lunchtime TIMESTAMP NOT NULL DEFAULT CURRENT_TIME this fails with the following error: Cannot add a column with non-constant default Ok that makes sense - but why can we CREATE a table with a timestamp field whose default is CURRENT_TIME, but not alter one with that as the default value? I may be misusing the syntax - SQLite doesn't modify the underlying table structure when you add a column using ALTER TABLE. So after the ALTER TABLE is executed, the existing rows now contain one value less than the table has columns. When SQLite reads the table, it detects the short row and returns the default column value in place of any missing values. This wouldn't work with something like CURRENT_TIME. Thanks, Mark ___ sqlite-users mailing list sqlite-users@sqlite.org http://sqlite.org:8080/cgi-bin/mailman/listinfo/sqlite-users ___ sqlite-users mailing list sqlite-users@sqlite.org http://sqlite.org:8080/cgi-bin/mailman/listinfo/sqlite-users
[sqlite] Can't insert timestamp field with value CURRENT_TIME
Hi, I'm trying to add a timestamp field to an existing table using the following statement: ALTER TABLE test ADD COLUMN lunchtime TIMESTAMP NOT NULL DEFAULT CURRENT_TIME this fails with the following error: Cannot add a column with non-constant default Ok that makes sense - but why can we CREATE a table with a timestamp field whose default is CURRENT_TIME, but not alter one with that as the default value? I may be misusing the syntax - Thanks, Mark ___ sqlite-users mailing list sqlite-users@sqlite.org http://sqlite.org:8080/cgi-bin/mailman/listinfo/sqlite-users
