--- In firebird-support@yahoogroups.com, "Martijn Tonies" <m.tonies@...> wrote: > > Hi, >
Hi Martijn, thanks for your reply. > > 3.3 Doing everything manually > > Means probably the most work, but appears to be the safest way at the > > moment. > > 3.3.1 I could start with the final UTF8 database, i.e. with all the > > structure changes etc. included > > 3.3.2 The source database would be accessed by a connection with ISO8859_1 > > as character set, the UTF8 one by a connection with UTF8 as character set > > This would work if the application is able to read ISO8859_1 and write UTF8, What do you mean by this? My new application is written in Delphi XE, which supports unicode. Wouldn't reading work with an connection, which has ISO8859_1 as character set? Maybe I could even access the fields as AnsiString if needed. The writing would happen over the UTF8 connection. > I think the DataPump > in Database Workbench should be able to do that for you. > I need to do the upgrade at customers machnies, so I fear Database Workbench can't help me here. > Use USO8859_1, no Unicode client, for the source, and UTF8, Unicode client > for the destination. Hm, same as above... I hoped to do it with one client (if it shall be the point "3.3 Doing everything manually" from my first post).. How else can I get the data from the ISO8859_1 client to the UTF8 one? > > Regarding 3.1.4 and 3.2.4: I've found this example on how to change the > > blob type: > > UPDATE RDB$FIELDS SET RDB$FIELD_SUB_TYPE = 0 > > WHERE RDB$FIELD_NAME=(SELECT RDB$FIELD_SOURCE FROM RDB$RELATION_FIELDS > > WHERE RDB$FIELD_NAME='SOME_TEXT_BLOB_FIELD' AND > > RDB$RELATION_NAME='SOME_TABLE'); > > Seems to work without the content getting lost. Sure, it's in the wrong > > format that way, but it seems to be possible to obtaint the content and > > then to save it in the new format. But depending on the choice of the way > > to go, this could be irrelevant. > > You are modifying the blob to BINARY, that doesn't sound right. > Yes, didn't look that "healthy" to me too, but has worked and that's what IBExpert (I believe) has made of my attempt to change the sub type manually.
