Re: SQL Alter table: can I remove the UNIQUE attribute from a key?

[CRPence <CRPbottle@xxxxxxxxx>]

  In the original script, notice that the DROP PRIMARY KEY is 
*supposed* to fail with the given setup.  The given setup matches what 
is shown, so the failure is to be expected.  One would then move on to 
the next statement in the script.  However I would suggest *not* 
performing the script, *unless* the final effect of the PF becoming 
Arrival Sequence Access Path is acceptable; i.e. the physical file will 
*no longer be keyed* and the file will no longer match its DDS.

Regards, Chuck

On 02 May 2013 08:44, Stone, Joel wrote:
> Great idea but it doesn't seem to work; running v5r4.
>
> Any ideas?
>
> runsql 'ALTER TABLE jstone/bzapplprq DROP PRIMARY KEY RESTRICT'
>
> gives error:
>
> Table BZAPPLPRQ in JSTONE does not have a primary or unique key.
> RUN QUERY command failed with SQLCODE -539.
> RUN QUERY command ended due to error.
> STRQMQRY command failed.
>
> DDS:
>
>                                        UNIQUE
>            R BZAPPLPRQR
>              XBZ_SEQNBR    10S
> ...
>
>            K XBZ_SEQNBR
>
> rob@xxxxxxxxx on Thursday, May 02, 2013 10:21 AM wrote:
>
> > You mean like this:
> >                              UNIQUE
> > R ABR
> >    MYKEY         11A
> >    MYDATA        10A
> > K MYKEY
> >
> > INSERT INTO ROB/AB VALUES(1, 1)
> > 1 rows inserted in AB in ROB.
> > INSERT INTO ROB/AB VALUES(1, 1)
> > Duplicate key value specified.
> >
> > ALTER TABLE ROB/AB DROP PRIMARY KEY RESTRICT
> > Table AB in ROB does not have a primary or unique key.
> >
> > ALTER TABLE ROB/AB ADD PRIMARY KEY (MYKEY)
> > ALTER completed for table AB in ROB.
> >
> > ALTER TABLE ROB/AB DROP PRIMARY KEY RESTRICT
> > ALTER completed for table AB in ROB.
> >
> > INSERT INTO ROB/AB VALUES(1, 1)
> > 1 rows inserted in AB in ROB.
> >
> > Summary:  Yes.  Even though it already has a primary key ADD the
> > constraint with SQL and then delete the constraint with SQL and it
> > drops the primary key.