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My tables are actually InnoDB - they are generated by DAL.

D.

mdipierro napsal(a):
> The DAL assumes InnoDB, not MYISAM. Perhaps that is the problem?
> 
> On Jul 20, 12:05 pm, David Zejda <[email protected]> wrote:
> Hello,
> 
> my db backend is MySQL 5.0.51a-24 on Linux.
> 
> If I try to gently alter already generated table schema, like to rename
> 
> SQLField('relation', 'text', requires = \
>        IS_NULL_OR(IS_IN_DB(db, 'relation_type.id', 'relation_type.id',
> multiple=True)))
> 
> to
> 
> SQLField('relation_type', 'text', requires = \
>        IS_NULL_OR(IS_IN_DB(db, 'relation_type.id', 'relation_type.id',
> multiple=True)))
> 
> i get this:
> 
> Traceback (most recent call last):
>   File "/home/zejdad/!a/jfind/web2py/gluon/restricted.py", line 98, in
> restricted
>     exec ccode in environment
>   File "/home/zejdad/!a/jfind/web2py/applications/jfind/models/db.py",
> line 346, in <module>
>     migrate="person"
>   File "/home/zejdad/!a/jfind/web2py/gluon/sql.py", line 938, in
> define_table
>     raise e
> OperationalError: (1025, "Error on rename of './jfind/#sql-ac1_5e' to
> './jfind/person' (errno: 150)")
> 
> Maybe, it is related to the troubles mentioned there:
> 
> http://forums.mysql.com/read.php?22,95361
> 
> Please, do you have any experiences with a such type of errors?
> 
> I would like to test it with MyISAM instead of InnoDB tables, but it is
> not easy to change it in already generated and interrelated tables:
> 
> ALTER TABLE `person` ENGINE = MYISAM
> 
> #1217 - Cannot delete or update a parent row: a foreign key constraint
> fails
> 
> Or should I try other MySQL version?
> 
> Thank you for advices!
> 
> David
> 
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