On Thu, 2009-07-30 at 16:17 +0200, Vivien Malerba wrote:
>
>
>
> 2009/7/30 Bas Driessen <[email protected]>
>
>
> > 2009/7/30 Bas Driessen <[email protected]>
> >
> >> Hello,
> >>
> >> My database is in MySQL. When I run the following command
> to rebuild the
> >> MetaStore (which lives in a sqlite3 database):
> >>
> >> gda_connection_update_meta_store(connection, NULL, &error)
> >>
> >> I get the following error/warning:
> >>
> >> ** (process:22406): WARNING **: (+5): Wrong Holder value
> type, expected
> >> type 'boolean' when value's type is 'string' (Provider
> ThreadWrapper)
> >>
> >>
> >> and the MySQL table information is not in the MetaStore. In
> fact if I
> >> do:
> >>
> >> select * from _tables;
> >>
> >> nothing shows up.
> >>
> >> Anyone else having this problem?
> >>
> >
> > The reason for this error is that a SELECT statement
> internally run by the
> > MySQL provider to get meta data returned a column of type
> string instead
> > to
> > a boolean. To solve this, the correction consists in
> locating the faulty
> > SELECT, and use
> gda_connection_statement_execute_select_full() with an
> > array
> > of expected types for the columns instead of
> > gda_connection_statement_execute_select(). This is already
> done at several
> > places in gda-mysql-meta.c.
> >
> > If you want to try to correct it, and if you are in the
> master branch, you
> > can use the definitions in
> > libgda/providers-support/gda-meta-column-types.h
> > (which is dynamically generated).
> >
> > Otherwise, I'd need to have more information to correct the
> problem
> > myself.
>
>
>
> OK, I will try to locate and correct the issue in libgda. Just
> wanted to
> have confirmed first that this is an issue in libgda and not
> in my setup.
>
>
> To help you, you can uncomment the line 2324 of the gda-meta-store.c
> file, so you'll get debug info about all the results the provider is
> returning for the meta store.
OK, I am a step further in this (I think). In file
providers/mysql/gda-mysql-meta.c, line 717 the structure should be
changed from:
GType col_types_views[] = {
G_TYPE_STRING, G_TYPE_STRING, G_TYPE_STRING,
G_TYPE_STRING,
G_TYPE_STRING, G_TYPE_STRING, G_TYPE_NONE
};
to:
GType col_types_views[] = {
G_TYPE_STRING, G_TYPE_STRING, G_TYPE_STRING,
G_TYPE_STRING,
G_TYPE_STRING, G_TYPE_BOOLEAN, G_TYPE_NONE
};
The original error will be gone and it will continue past the point
where it stopped. However, there are now many new error messages:
(process:8055): GLib-WARNING **: GError set over the top of a previous
GError or uninitialized memory.
This indicates a bug in someone's code. You must ensure an error is NULL
before it's set.
The overwriting error message was: Type gchararray not mapped for value
0
(process:8055): GLib-WARNING **: GError set over the top of a previous
GError or uninitialized memory.
This indicates a bug in someone's code. You must ensure an error is NULL
before it's set.
The overwriting error message was: Type gint not mapped for value (null)
(process:8055): GLib-WARNING **: GError set over the top of a previous
GError or uninitialized memory.
This indicates a bug in someone's code. You must ensure an error is NULL
before it's set.
The overwriting error message was: Invalid column bind data type. 253
(this repeats many many times)
============
(process:8055): GLib-WARNING **: GError set over the top of a previous
GError or uninitialized memory.
This indicates a bug in someone's code. You must ensure an error is NULL
before it's set.
The overwriting error message was: Unable to get value for row 0 and
column 10
** (process:8055): WARNING **: Type gint not mapped for value (null)
(Provider ThreadWrapper)
As a rollback is triggered, the meta store is empty.
I have no idea if I am pretty close to have this all working, or if this
whole area is still up for a re-write/under development.
See also my previous thread for a reproducible case of this issue.
Any comments/tips/hints?
Thanks,
Bas.
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