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How to disabled all constraints when importing data (urgent)

Hi:

I am not sure whether somebody can sort it out for me.

I am doing data transfer from one oracle database to another. Both of
them has the same structure (like same tables etc).the only thing i
need to do is data transfering.

i designed a vb program to do this, What i am worrying is when I run
this program it might fire some constrants. Anybody can give me some
ideas on how to avoid these constraints when data import?? I have to
disable all the constrainsts first or i can do it in another way?

Millions thanks in advance!
Paul
Jul 19 '05 #1
2 10431
"Paul" <ji***********@yahoo.com> wrote in
news:f2**************************@posting.google.c om...
Hi:

I am not sure whether somebody can sort it out for me.

I am doing data transfer from one oracle database to another. Both of them has the same structure (like same tables etc).the only thing i
need to do is data transfering.

i designed a vb program to do this, What i am worrying is when I run
this program it might fire some constrants. Anybody can give me some
ideas on how to avoid these constraints when data import?? I have to
disable all the constrainsts first or i can do it in another way?

Millions thanks in advance!
Paul


Hi Paul,

are you really sure using VB is the right thing
for this task? It smells like imp / exp would be
the better way. Anyway: you can defer the column
constraints with the 'set constraints all deferred'
statement before starting the data insert. Then the
constraints will come into play at commit time.
If the constraints aren't deferable, you have to use
some pl/sql to loop through user_constraints to get
the names and issue dynamic sql statements which disable
those constraints.

hth,
Guido
Jul 19 '05 #2
"Guido Konsolke" <Gu************@triaton.com> wrote in message news:<10**************@news.thyssen.com>...
"Paul" <ji***********@yahoo.com> wrote in
news:f2**************************@posting.google.c om...
Hi:

I am not sure whether somebody can sort it out for me.

I am doing data transfer from one oracle database to another. Both

of
them has the same structure (like same tables etc).the only thing i
need to do is data transfering.

i designed a vb program to do this, What i am worrying is when I run
this program it might fire some constrants. Anybody can give me some
ideas on how to avoid these constraints when data import?? I have to
disable all the constrainsts first or i can do it in another way?

Millions thanks in advance!
Paul


Hi Paul,

are you really sure using VB is the right thing
for this task? It smells like imp / exp would be
the better way. Anyway: you can defer the column
constraints with the 'set constraints all deferred'
statement before starting the data insert. Then the
constraints will come into play at commit time.
If the constraints aren't deferable, you have to use
some pl/sql to loop through user_constraints to get
the names and issue dynamic sql statements which disable
those constraints.

hth,
Guido


Paul,
also check the table USER_CONS_COLUMNS

Frans H.
Jul 19 '05 #3

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