I have been trying to customize the SQL of some reports so they display the
date in a different format. I have read around and tried to apply the
examples I could find. However none of my attempts worked, and all resulted
in the same error.

I use trac 0.10.4 on Ubuntu 8

For example consider the query:
select time as CREATED from ticket

I would like to change it so it displays the time as well, so I tried:

select strftime('%Y%m%d-%H%M', datetime(time, 'unixepoch')) as CREATED from
ticket
select strftime('%Y%m%d-%H%M', time, 'unixepoch') as CREATED from ticket
select strftime('%Y%m%d-%H%M', time) as CREATED from ticket

All of them result in:

"TRAC detected an internal error", with the following Python traceback:

Traceback (most recent call last):
  File "/var/lib/python-support/python2.5/trac/web/main.py", line 406, in
dispatch_request
    dispatcher.dispatch(req)
  File "/var/lib/python-support/python2.5/trac/web/main.py", line 237, in
dispatch
    resp = chosen_handler.process_request(req)
  File "/var/lib/python-support/python2.5/trac/ticket/report.py", line 88,
in process_request
    resp = self._render_view(req, db, id)
  File "/var/lib/python-support/python2.5/trac/ticket/report.py", line 346,
in _render_view
    value['date'] = format_date(cell)
  File "/var/lib/python-support/python2.5/trac/util/datefmt.py", line 68, in
format_date
    return format_datetime(t, format, gmt)
  File "/var/lib/python-support/python2.5/trac/util/datefmt.py", line 58, in
format_datetime
    t = time.localtime(float(t))
ValueError: invalid literal for float(): 20080528-22:41


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