Unable to choose foreign key when creating reference partition

Hello
I have 2 foreign keys on a table. I am trying to choose the 2nd foreign key when creating a reference partition. I am unable to select the required foreign key.
The model has Table A -> Table B -> Table C. Table A has a list partition. Table B is the child of Table A. I created a reference partition on Table B. Table C is child of Table B. There are 2 FKs on table C. I am unable to choose the required FK to create reference partition on table C.
SQL Developer version - 3.0.0.665
Any help would be appreciated.

Hi,
The FK that can be selected is normally the oldest FK that was created for the Table.
So one option would be to delete and then recreate the FK that is selectable. This process may need to be repeated if there are several FKs that are "older" than the one you wish to use for Reference Partitioning.
David

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Kind of bug report, using assemblies version v11.0.0.0 and ScriptingOptions.DriAll = true.
When you have tables with foreign keys or other constraints, these are not scripted when you pass urns of all tables to Scripter.Script which has Prefetch property set to true. I believe this is due to a bug in prefetching.
To workaround, set Scripter.Prefetch = false. Strange enough, passing urns of subset of the tables works as well (even excluding one table only), which results in the "constraints are returned when passing single urn only" reported behavior.

Hi, sure, sorry for late reply.
This is the DB create script:
DROP DATABASE [TestDB]
USE [master]
GO
CREATE DATABASE [TestDB] CONTAINMENT = NONE ON PRIMARY
( NAME = N'TestDB', FILENAME = N'C:\Windows\Temp\Test.mdf' , SIZE = 5120KB , MAXSIZE = UNLIMITED, FILEGROWTH = 1024KB ) LOG ON
( NAME = N'TestLG', FILENAME = N'C:\Windows\Temp\Test.ldf' , SIZE = 1024KB , MAXSIZE = 2048GB , FILEGROWTH = 10%)
GO
ALTER DATABASE [TestDB] SET COMPATIBILITY_LEVEL = 110
GO
ALTER DATABASE [TestDB] SET ANSI_NULL_DEFAULT OFF
ALTER DATABASE [TestDB] SET ANSI_NULLS OFF
ALTER DATABASE [TestDB] SET ANSI_PADDING OFF
ALTER DATABASE [TestDB] SET ANSI_WARNINGS OFF
ALTER DATABASE [TestDB] SET ARITHABORT OFF
ALTER DATABASE [TestDB] SET AUTO_CLOSE OFF
ALTER DATABASE [TestDB] SET AUTO_CREATE_STATISTICS ON
ALTER DATABASE [TestDB] SET AUTO_SHRINK OFF
ALTER DATABASE [TestDB] SET AUTO_UPDATE_STATISTICS ON
ALTER DATABASE [TestDB] SET CURSOR_CLOSE_ON_COMMIT OFF
ALTER DATABASE [TestDB] SET CURSOR_DEFAULT GLOBAL
ALTER DATABASE [TestDB] SET CONCAT_NULL_YIELDS_NULL OFF
ALTER DATABASE [TestDB] SET NUMERIC_ROUNDABORT OFF
ALTER DATABASE [TestDB] SET QUOTED_IDENTIFIER OFF
ALTER DATABASE [TestDB] SET RECURSIVE_TRIGGERS OFF
ALTER DATABASE [TestDB] SET DISABLE_BROKER
ALTER DATABASE [TestDB] SET AUTO_UPDATE_STATISTICS_ASYNC OFF
ALTER DATABASE [TestDB] SET DATE_CORRELATION_OPTIMIZATION OFF
ALTER DATABASE [TestDB] SET TRUSTWORTHY OFF
ALTER DATABASE [TestDB] SET ALLOW_SNAPSHOT_ISOLATION OFF
ALTER DATABASE [TestDB] SET PARAMETERIZATION SIMPLE
ALTER DATABASE [TestDB] SET READ_COMMITTED_SNAPSHOT OFF
ALTER DATABASE [TestDB] SET HONOR_BROKER_PRIORITY OFF
ALTER DATABASE [TestDB] SET RECOVERY SIMPLE
ALTER DATABASE [TestDB] SET MULTI_USER
ALTER DATABASE [TestDB] SET PAGE_VERIFY CHECKSUM
ALTER DATABASE [TestDB] SET DB_CHAINING OFF
ALTER DATABASE [TestDB] SET FILESTREAM( NON_TRANSACTED_ACCESS = OFF )
ALTER DATABASE [TestDB] SET TARGET_RECOVERY_TIME = 0 SECONDS
ALTER DATABASE [TestDB] SET READ_WRITE
GO
USE [TestDB]
GO
CREATE TABLE [dbo].[KeySource] (
[ID] [smallint] IDENTITY(1,1) NOT NULL,
CONSTRAINT [PK_Reservation] PRIMARY KEY CLUSTERED ([ID] ASC)
WITH (PAD_INDEX = OFF, STATISTICS_NORECOMPUTE = OFF, IGNORE_DUP_KEY = OFF, ALLOW_ROW_LOCKS = ON, ALLOW_PAGE_LOCKS = ON) ON [PRIMARY]
) ON [PRIMARY]
CREATE TABLE [dbo].[KeyUse] (
[UseID] [smallint] NOT NULL,
[Row] [tinyint] NOT NULL,
[Column] [tinyint] NOT NULL,
CONSTRAINT [PK_KeySource] PRIMARY KEY CLUSTERED ([UseID] ASC, [Row] ASC, [Column] ASC)
WITH (PAD_INDEX = OFF, STATISTICS_NORECOMPUTE = OFF, IGNORE_DUP_KEY = OFF, ALLOW_ROW_LOCKS = ON, ALLOW_PAGE_LOCKS = ON) ON [PRIMARY],
CONSTRAINT [IX_ReservationSeats] UNIQUE NONCLUSTERED ([Row] ASC, [Column] ASC)
WITH (PAD_INDEX = OFF, STATISTICS_NORECOMPUTE = OFF, IGNORE_DUP_KEY = OFF, ALLOW_ROW_LOCKS = ON, ALLOW_PAGE_LOCKS = ON) ON [PRIMARY]
) ON [PRIMARY]
GO
ALTER TABLE [dbo].[KeyUse] WITH CHECK ADD CONSTRAINT [FK_Source_Use] FOREIGN KEY([UseID]) REFERENCES [dbo].[KeySource] ([ID])
ON UPDATE CASCADE
ON DELETE CASCADE
ALTER TABLE [dbo].[KeyUse] CHECK CONSTRAINT [FK_Source_Use]
ALTER TABLE [dbo].[KeyUse] WITH CHECK ADD CONSTRAINT [FK_Use_Use] FOREIGN KEY([UseID], [Row], [Column]) REFERENCES [dbo].[KeyUse] ([UseID], [Row], [Column])
ALTER TABLE [dbo].[KeyUse] CHECK CONSTRAINT [FK_Use_Use]
This is the code:
ServerConnection serverConnection = new ServerConnection("server", "user", "pwd");
Server server = new Server(serverConnection);
Database database = server.Databases["TestDB"];
Urn[] urns = database.EnumObjects(DatabaseObjectTypes.Table).Rows.OfType<DataRow>().Select(r => new Urn((string)r["Urn"])).Take(2).ToArray();
Scripter s = new Scripter(server);
s.Options.DriAll = true;
StringCollection result = s.Script(urns);
This is the result:
SET ANSI_NULLS ON
SET QUOTED_IDENTIFIER ON
CREATE TABLE [dbo].[KeySource](
[ID] [smallint] IDENTITY(1,1) NOT NULL
) ON [PRIMARY]
SET ANSI_NULLS ON
SET QUOTED_IDENTIFIER ON
CREATE TABLE [dbo].[KeyUse](
[UseID] [smallint] NOT NULL,
[Row] [tinyint] NOT NULL,
[Column] [tinyint] NOT NULL
) ON [PRIMARY]
Note that the constraints are missing.
As already noted, adding s.PrefetchObjects = false; line fixes this.
But let's do the magic way - supplying less Urns than there actually is tables. To test this, add a dummy table to the DB:
USE [TestDB]
CREATE TABLE [dbo].[DummyTable]([Test] [nchar](10) NULL) ON [PRIMARY]
Run the code again. Note that the Take(2) method limits the Urns supplied to the Scripter to the same set as before.
However, the result is now:
SET ANSI_NULLS ON
SET QUOTED_IDENTIFIER ON
CREATE TABLE [dbo].[KeySource](
[ID] [smallint] IDENTITY(1,1) NOT NULL,
CONSTRAINT [PK_Reservation] PRIMARY KEY CLUSTERED
[ID] ASC
)WITH (PAD_INDEX = OFF, STATISTICS_NORECOMPUTE = OFF, IGNORE_DUP_KEY = OFF, ALLOW_ROW_LOCKS = ON, ALLOW_PAGE_LOCKS = ON) ON [PRIMARY]
) ON [PRIMARY]
SET ANSI_NULLS ON
SET QUOTED_IDENTIFIER ON
CREATE TABLE [dbo].[KeyUse](
[UseID] [smallint] NOT NULL,
[Row] [tinyint] NOT NULL,
[Column] [tinyint] NOT NULL,
CONSTRAINT [PK_KeySource] PRIMARY KEY CLUSTERED
[UseID] ASC,
[Row] ASC,
[Column] ASC
)WITH (PAD_INDEX = OFF, STATISTICS_NORECOMPUTE = OFF, IGNORE_DUP_KEY = OFF, ALLOW_ROW_LOCKS = ON, ALLOW_PAGE_LOCKS = ON) ON [PRIMARY],
CONSTRAINT [IX_ReservationSeats] UNIQUE NONCLUSTERED
[Row] ASC,
[Column] ASC
)WITH (PAD_INDEX = OFF, STATISTICS_NORECOMPUTE = OFF, IGNORE_DUP_KEY = OFF, ALLOW_ROW_LOCKS = ON, ALLOW_PAGE_LOCKS = ON) ON [PRIMARY]
) ON [PRIMARY]
ALTER TABLE [dbo].[KeyUse] WITH CHECK ADD CONSTRAINT [FK_Source_Use] FOREIGN KEY([UseID])
REFERENCES [dbo].[KeySource] ([ID])
ON UPDATE CASCADE
ON DELETE CASCADE
ALTER TABLE [dbo].[KeyUse] CHECK CONSTRAINT [FK_Source_Use]
ALTER TABLE [dbo].[KeyUse] WITH CHECK ADD CONSTRAINT [FK_Use_Use] FOREIGN KEY([UseID], [Row], [Column])
REFERENCES [dbo].[KeyUse] ([UseID], [Row], [Column])
ALTER TABLE [dbo].[KeyUse] CHECK CONSTRAINT [FK_Use_Use]
By testing on larger database I have noticed it does not really matter which table is excluded from the list.
Hope this helps,
Jan

Accurate statistics on skewed foreign key when coming from parent

Hi,
I will be as short as possible:
- we have two tables in a parent - child relationship. The foreign key is very skewed and we need to get child details coming from the parent
- CBO is not considering the skeweness from histograms on foreign key column (I suppose it cannot as it is the example without going into tables) and it calculates the expected returning rows in the execution plan as no_rows / distinct_values => 10,000 / 3 = 3,333 rows for both execution plans, even if they returns effectively 1 row / 9,999 rows. In histograms exists this information but it cannot be extracted by CBO as it is.
Any idea how to help CBO to choose separate execution plans for query 1 and query 2 excluding hints or query modifications?
-- Oracle Database 10.2.0.3
--DROP TABLE child;
--DROP TABLE parent;
CREATE TABLE parent AS SELECT LEVEL parent_num, 'parent_' || LEVEL parent_id FROM DUAL CONNECT BY LEVEL <= 10;
ALTER TABLE parent ADD CONSTRAINT parent_pk PRIMARY KEY (parent_num);
CREATE UNIQUE INDEX parent_id_ix ON PARENT (parent_id, parent_num);
CREATE TABLE child AS SELECT DECODE (LEVEL, 1, 1, 10000, 10, 5) parent_num, 'child_' || LEVEL child_id FROM DUAL CONNECT BY LEVEL <= 10000;
ALTER TABLE child ADD FOREIGN KEY (parent_num) REFERENCES parent (parent_num) ON DELETE CASCADE;
CREATE INDEX child_parent_num_ix ON CHILD(parent_num);
exec dbms_stats.gather_table_stats(ownname=>'***REPLACE WITH YOUR OWN USER***',tabname=>'PARENT',estimate_percent=>100,cascade=>TRUE,method_opt=>'FOR ALL COLUMNS SIZE 1');
exec dbms_stats.gather_table_stats(ownname=>'***REPLACE WITH YOUR OWN USER***',tabname=>'CHILD',estimate_percent=>100,cascade=>TRUE,method_opt=>'FOR COLUMNS parent_num SIZE 3, child_id SIZE 1');
-- QUERY 1: this query should be very selective (1 row), using index
SELECT c.child_id FROM child c, parent p WHERE c.parent_num = p.parent_num AND p.parent_id = 'parent_1';
-- QUERY 2: it should return 99.9999% of the rows (9,999 rows), so it should use full table scan
SELECT c.child_id FROM child c, parent p WHERE c.parent_num = p.parent_num AND p.parent_id = 'parent_5';
In reality both queries have the same execution plan as below:
Execution Plan
Plan hash value: 4033709836
| Id | Operation | Name | Rows | Bytes | Cost (%CPU)| Time |
| 0 | SELECT STATEMENT | | 3333 | 83325 | 6 (0)| 00:00:01 |
| 1 | NESTED LOOPS | | 3333 | 83325 | 6 (0)| 00:00:01 |
| 2 | TABLE ACCESS BY INDEX ROWID| PARENT | 1 | 12 | 1 (0)| 00:00:01 |
|* 3 | INDEX UNIQUE SCAN | PARENT_ID_IX | 1 | | 0 (0)| 00:00:01 |
|* 4 | TABLE ACCESS FULL | CHILD | 3333 | 43329 | 5 (0)| 00:00:01 |
Predicate Information (identified by operation id):
3 - access("P"."PARENT_ID"='parent_1')
4 - filter("C"."PARENT_NUM"="P"."PARENT_NUM")
Execution Plan
Plan hash value: 4033709836
| Id | Operation | Name | Rows | Bytes | Cost (%CPU)| Time |
| 0 | SELECT STATEMENT | | 3333 | 83325 | 6 (0)| 00:00:01 |
| 1 | NESTED LOOPS | | 3333 | 83325 | 6 (0)| 00:00:01 |
| 2 | TABLE ACCESS BY INDEX ROWID| PARENT | 1 | 12 | 1 (0)| 00:00:01 |
|* 3 | INDEX UNIQUE SCAN | PARENT_ID_IX | 1 | | 0 (0)| 00:00:01 |
|* 4 | TABLE ACCESS FULL | CHILD | 3333 | 43329 | 5 (0)| 00:00:01 |
Predicate Information (identified by operation id):
3 - access("P"."PARENT_ID"='parent_5')
4 - filter("C"."PARENT_NUM"="P"."PARENT_NUM")
column table_name format A10
column column_name format A11
column endpoint_actual_value format A21
select * from user_tab_histograms where table_name='CHILD' and column_name='PARENT_NUM';
TABLE_NAME COLUMN_NAME ENDPOINT_NUMBER ENDPOINT_VALUE ENDPOINT_ACTUAL_VALUE
CHILD PARENT_NUM 1 1
CHILD PARENT_NUM 9999 5
CHILD PARENT_NUM 10000 10
3 rows selected.
I am sorry about the formatting but this is the best I could following plain text help.
Thank you,
Eugen
Edited by: Eugen Iacob on Dec 13, 2011 3:21 AM
Edited by: Eugen Iacob on Dec 13, 2011 12:36 PM
Edited by: Eugen Iacob on Dec 13, 2011 12:37 PM
Edited by: Eugen Iacob on Dec 14, 2011 2:13 AM

Hi,
you can create a function based index on child table, and query that value instead of parent_id from parent table.
SQL> select * from v$version;
BANNER
Oracle Database 10g Express Edition Release 10.2.0.1.0 - Product
PL/SQL Release 10.2.0.1.0 - Production
CORE     10.2.0.1.0     Production
TNS for 32-bit Windows: Version 10.2.0.1.0 - Production
NLSRTL Version 10.2.0.1.0 - Production
CREATE TABLE parent AS SELECT LEVEL parent_num, 'parent_' || LEVEL parent_id, 'some text ' || level parent_name
FROM DUAL CONNECT BY LEVEL <= 10;
ALTER TABLE parent ADD CONSTRAINT parent_pk PRIMARY KEY (parent_num);
CREATE UNIQUE INDEX parent_id_ix ON PARENT (parent_id, parent_num);
CREATE TABLE child AS SELECT DECODE (LEVEL, 1, 1, 10000, 10, 5) parent_num, 'child_' || LEVEL child_id,
'some text ' || level child_name
FROM DUAL CONNECT BY LEVEL <= 10000;
ALTER TABLE child ADD FOREIGN KEY (parent_num) REFERENCES parent (parent_num) ON DELETE CASCADE;
CREATE INDEX child_parent_num_ix ON CHILD(parent_num);
CREATE OR REPLACE function get_parent_id( in_parent_num in number )
RETURN parent.parent_id%TYPE
DETERMINISTIC
IS
ret parent.parent_id%TYPE;
BEGIN
SELECT parent_id INTO ret
FROM parent
WHERE parent_num = in_parent_num;
RETURN ret;
END;
CREATE INDEX child_parent_id_idx ON child( get_parent_id( parent_num ) );
exec dbms_stats.gather_table_stats(ownname=>user,tabname=>'CHILD',estimate_percent=>100,cascade=>TRUE,method_opt=>'FOR ALL HIDDEN COLUMNS');
explain plan for
SELECT p.parent_name, c.child_name
FROM child c, parent p
WHERE c.parent_num = p.parent_num AND get_parent_id(c.parent_num ) = 'parent_1';
select * from table( dbms_xplan.display );
plan FOR succeeded.
PLAN_TABLE_OUTPUT
Plan hash value: 3790918082
| Id | Operation                    | Name                | Rows | Bytes | Cost (%CPU)| Time     |
|   0 | SELECT STATEMENT             |                     |     1 |    77 |     3   (0)| 00:00:01 |
|   1 | NESTED LOOPS                |                     |     1 |    77 |     3   (0)| 00:00:01 |
|   2 |   TABLE ACCESS BY INDEX ROWID| CHILD               |     1 |    37 |     2   (0)| 00:00:01 |
|* 3 |    INDEX RANGE SCAN          | CHILD_PARENT_ID_IDX |     1 |       |     1   (0)| 00:00:01 |
|   4 |   TABLE ACCESS BY INDEX ROWID| PARENT              |     1 |    40 |     1   (0)| 00:00:01 |
|* 5 |    INDEX UNIQUE SCAN         | PARENT_PK           |     1 |       |     0   (0)| 00:00:01 |
Predicate Information (identified by operation id):
   3 - access("TEST"."GET_PARENT_ID"("PARENT_NUM")='parent_1')
   5 - access("C"."PARENT_NUM"="P"."PARENT_NUM")
Note
   - dynamic sampling used for this statement
22 rows selected
explain plan for
SELECT p.parent_id, c.child_id
FROM child c, parent p
WHERE c.parent_num = p.parent_num AND get_parent_id(c.parent_num ) = 'parent_5';
select * from table( dbms_xplan.display );
plan FOR succeeded.
PLAN_TABLE_OUTPUT
Plan hash value: 2656363181
| Id | Operation          | Name         | Rows | Bytes | Cost (%CPU)| Time     |
|   0 | SELECT STATEMENT   |              | 9998 |   732K|    23 (27)| 00:00:01 |
|* 1 | HASH JOIN         |              | 9998 |   732K|    23 (27)| 00:00:01 |
|   2 |   INDEX FULL SCAN | PARENT_ID_IX |    10 |   380 |     1   (0)| 00:00:01 |
|* 3 |   TABLE ACCESS FULL| CHILD        | 9998 |   361K|    21 (24)| 00:00:01 |
Predicate Information (identified by operation id):
   1 - access("C"."PARENT_NUM"="P"."PARENT_NUM")
   3 - filter("GET_PARENT_ID"("C"."PARENT_NUM")='parent_5')
Note
   - dynamic sampling used for this statement
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How do I choose an image when creating or updating a Contact?

Hey All,
I just upgraded to Mountain Lion and I'm converting all of my contacts (from various accounts) to use the iCloud service, and all is going very well except for one small thing. When I either update or create a new contact via the Contacts application, I cannot choose a custom image to associate with a contact. The application only allows me to choose from a list of "Defaults", "Recently Used" or allows me to take a picture from my computer's camera. It seems odd that I can't simply select any image from my hard drive (or from iPhoto), but maybe I haven't set something up correctly.
The web interface for iCloud allows me to select a custom image from my hard drive so I have a work around, but its a bit clunky to do a lot of them.
Anyone else having this problem?
Thanks!!!

When you're in the contact photo edit screen, in the bottom right there is another edit button, click that and drag and drop the desired image in there, scale it as desired, save.

Unable to set up Kerberos when creating Open Directory Master-beginner!

I'm trying to promote a standalone server to an Open Directory master.
In the Kerberos section I am typing my FQDN into the Realm field
which is studioserver.example.com.
However the searchbase is already filled with dc=studioserver,dc=local
I've tried every different permutation but when I save the settings, the overview shows that Kerberos is stopped and therefore no KDC is created.
I've used Lookup to confirm that DNS is ok...could this still be the problem?
Any help much appreciated.

Hi
If DNS is configured correctly then the Kerberos Realm and search base fields will be both filled in automatically. The only difficult you have to do is decide on the Directory Administrator name and password and click OK.
The only way out of this is to demote back to Standalone. This will trash the LDAP configuration and database effectively allowing you to start again. Export any users and groups first. Home folders (if you have created any) will not be affected.
Go back and stop the DNS Service and delete the configuration you have in there, stop any other service you have running as well as deleting any configuration that depends on DNS. If you have configured DHCP, stop this and delete the configuration. Restart the server. Start simple file services first, AFP etc and then move onto DNS. Make sure this is resolving correctly. Avoid .local.
Follow the instructions given in the first thread.
You could also download the Open Directory Administration Manual from here:
http://www.apple.com/support/manuals/macosxserver/
Tony

Choosing default currency when creating an EPMA application

Good morning everyone,
I have to create a new EPMA application. In the early steps of the Application Creation Wizard you have to choose the default currency from a dropdown list, but the currency I need is not listed in it.
Is there any way to add a new currency to that dropdown list?
Thank you.
Regards,
G.S.Feliu

Hi,
NO U cannot have it since Currency in sales is in Sales Org which is missing in yr config.
U need to enter it manually.
Regards
Krishna

Unable to choose foreign key when creating reference partition

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