Le 31/05/12 19:21, Andreas Säger a écrit :
ALTER TABLE "table name" ALTER COLUMN "column name" SET DEFAULT
I just tried that, and what do you know, it didn't work :
With an existing hsqldb db Table containing :
ID int autoincrement=YES
PRIMARY KEY = ID
I filled the table with a few records, save, quit, restart, reload.
I then added a date field called dtchg (defined as DATE not DATE/TIME).
I left made this field non-nullable, then saved the table definition,
quit the app, restarted.
Opened ODB file, went to Tools SQL and entered the command you indicated :
Command executed successfully. OK, I thought, lets try it out.
Opened the table for data entry, nothing in the date field, fair enough,
I didn't ask it to update the previous entries.
Tried entering a new tuple. Tab between fields, when I get to the last
field, i.e. the dtchg field, I leave blank and press Tab. Error !!
"Attempt to insert null into a non-nullable column: column: ID table:
seq3 in statement [INSERT INTO "seq3" ( "numseq","typeseq") VALUES ( ?,?)]"
OK, I thought, it can't handle automatically filling the dtchg field
with what is supposed to be an automatically provided entry. Abandon the
changes, and close the table.
So, I re-edit my table properties and try to turn the field into
something which can be NULL, save the definition, save the db, quit,
Tried entering a new tuple, tabbing between fields. Get to the dtchg
field : Error !!! Same bloody message. So for some reason the change
from non-nullable to nullable wasn't registered.
Go figure. If I do this with mysql (via non Base tools, eg. CLI or
phpmyadmin), it works.
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