Don't hesitate to send me patches for testing in Oracle.
There are more problems when running on Oracle, but they can be
eliminated:
1. Famous Oracle error 'identifier is too long' - usually happens in
models like
db.define_table('headers',...)
db.define_table('details',
SQLFIELD('header_id', 'header')
)
Web2py builds constraint for key field and it is named something like
'detais_header_id__constraint' - and this often exceeds 31 chars limit
allowed by Oracle for all identifiers. I suggest to make suffix
shorter, e.g. '_c' or just '_' otherwise I have to globally rename
readable identifiers to something like 'a_b' in all of my code.
2. Maybe my design fault, but anyway: open source databases usually
truncate strings if you write 'longtextmanychars' to VARCHAR(8). Grown
up guys like Oracle don't allow this and give error. I tried to write
a fix-up function like
def truncate_string(sql_field, string):
if sql_field.type=='string': return string[:sql_field.length]
else: return string
but this completely breaks for international texts. Adding unicode
(string, 'utf-8') and so on similar to your code in SQLTABLE truncate
does not help - Oracle VARCHAR2(255) does not let my strings in.
Thank you!
Sergey
On Mar 27, 8:29 am, mdipierro <[email protected]> wrote:
> Thank you. Will look into these asap.
>
> Massimo
>
> On Mar 26, 9:46 am, SergeyPo <[email protected]> wrote:
>
> > Hi all,
>
> > these probolems may be caused by unicode support by Oracle DB (or not
> > - I don't know). The code works fine with MySQL and SQLite.
>
> > 1. DAL migrations do not work if you change length of 'string' field.
> > E.g. I have this:
> > SQLField('komment', 'string', length=255)
> > and I try to change it to
> > SQLField('komment', 'string', length=512)
> > and I get ORA-00911 error (bad symbol!)
>
> > 2. When I try to migrate this field to SQLField('komment', 'text') I
> > get same error: ORA-00911
>
> > 3. I managed to migrate by removing this field definition, running the
> > model (reload db admin page in browser) and pasting back the field
> > definition SQLField('komment', 'text')
> > Everything looked ok.
> > Then I run data import script that inserts data from UTF-8 encoded
> > file into this field. Script worked without problems.
> > Then I try to see data in db admin page and get this error (the same
> > error I get from any scripts that try to read data from this field):
>
> > Traceback (most recent call last):
> > File "c:\web2py\gluon\restricted.py", line 98, in restricted
> > exec ccode in environment
> > File "c:/web2py/applications/advantage/controllers/appadmin.py",
> > line 196, in <module>
> > File "c:\web2py\gluon\globals.py", line 75, in <lambda>
> > self._caller = lambda f: f()
> > File "c:/web2py/applications/advantage/controllers/appadmin.py",
> > line 160, in select
> > records=SQLTABLE
> > (records,linkto,upload,orderby=True,_class='sortable'))
> > File "c:\web2py\gluon\sqlhtml.py", line 634, in __init__
> > r = str(field.formatter(r))
> > ProgrammingError: LOB variable no longer valid after subsequent fetch
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