fporto wrote:
Narayanan-4 wrote:
fporto wrote:
Hi,
I'm receiving the following message when trying to drop a table:
ERROR X0Y25: Operation 'DROP CONSTRAINT' cannot be performed on object
'SQL080516103912600' because CONSTRAINT 'SQL080525110646121' is dependent
on
that object.
I would like to obtain the list of constraints associated to each of my
tables.
I've tried to use the Describe SQL command but it doesn't print
constraint
info.
I've also tried to query system tables:sysconstraints, sysdepends but
couldn't find the objects referred to in the msgs.
Can someone there help me on this?
cheers,
Fabio.
I tried this
select CONSTRAINTNAME from sys.SYSCONSTRAINTS,sys.systables where
sys.systables.tablename='NARAYANAN' and
sys.sysconstraints.tableid=sys.systables.tableid;
Replace the tablename with the name of the table for which you want to
find the constraints.
Narayanan
Thanks Narayanan,
in fact when I query the table sys.sysconstraints the refered constraint id
is not there:
select * from sys.sysconstraints where constraintid= 'SQL080525110646121';
CONSTRAINTID |TABLEID
|CONSTRAINTNAME
|&|SCHEMAID |&|REFERENCEC&
---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
0 rows selected
--
It seems to me that there is some dangling reference. In fact, this error
message appears when dropping the table databases:
ij> describe databases;
COLUMN_NAME
|TYPE_NAME|DEC&|NUM&|COLUM&|COLUMN_DEF|CHAR_OCTE&|IS_NULL&
------------------------------------------------------------------------------
DBID |DECIMAL |0 |10 |4 |NULL |NULL |NO
HOSTSHORT |VARCHAR |NULL|NULL|20 |NULL |40 |YES
IRI |VARCHAR |NULL|NULL|100 |NULL |200 |YES
DRIVERNAME |VARCHAR |NULL|NULL|150 |NULL |300 |YES
DATABASETYPE |DECIMAL |0 |10 |2 |NULL |NULL |YES
SERVERID |NUMERIC |0 |10 |2 |NULL |NULL |YES
6 rows selected
ij> drop table databases;
ERROR X0Y25: Operation 'DROP CONSTRAINT' cannot be performed on object
'SQL080516103925800' because CONSTRAINT 'SQL080525110734830' is dependent on
that object.
ij> select * from sys.sysconstraints where constraintid=
'SQL080525110734830';
CONSTRAINTID |TABLEID
|CONSTRAINTNAME
|&|SCHEMAID |&|REFERENCEC&
---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
0 rows selected.
Fabio.
Hi Fabio,
I think the problem is that you are trying to look up the constraint by
its id rather than its name. The original error message was phrased in
terms of the constraint's name, not its id. Here is the output of a
little script which demonstrates the relationship between the error
message and the columns in sys.sysconstraints:
ij> create table t( a int primary key );
0 rows inserted/updated/deleted
ij> create table s( a int references t( a ) );
0 rows inserted/updated/deleted
ij> drop table t;
ERROR X0Y25: Operation 'DROP CONSTRAINT' cannot be performed on object
'SQL080527064442130' because CONSTRAINT 'SQL080527064442220' is
dependent on that object.
ij> select c.constraintname, c.constraintid
from sys.sysconstraints c, sys.systables t
where t.tableid=c.tableid
and t.tablename='T';
CONSTRAINTNAME
|CONSTRAINTID
---------------------------------------------------------------------------------------------------------------------------------------------------------------------
SQL080527064442130
|6839c016-011a-2a9f-9dde-000000121ac0
1 row selected
ij> select c.constraintname, c.constraintid
from sys.sysconstraints c, sys.systables t
where t.tableid=c.tableid
and t.tablename='S';
CONSTRAINTNAME
|CONSTRAINTID
---------------------------------------------------------------------------------------------------------------------------------------------------------------------
SQL080527064442220
|2057c01b-011a-2a9f-9dde-000000121ac0
1 row selected
Hope this helps,
-Rick
