Error Updating Primary Drop
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Can't Drop Foreign Key Check That Column/key Exists
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Update Or Delete On Table Violates Foreign Key Constraint Rails
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Update Or Delete On Table Violates Foreign Key Constraint Hibernate
for SQL Server and SQL AzureVersion:7.x-1.2Component:CodePriority:NormalCategory:Bug reportAssigned:UnassignedReporter:dyuleCreated:May 15, 2012 - 17:54Updated:September 23, 2014 - can't drop 'primary'; check that column/key exists 18:46 Log in or register to update this issue Jump to:Most recent comment Hello, I'm working on developing a Drupal key is not present in table module. I created an update to a table that involves dropping and re-creating a primary key. The update works fine on my local development machine, which is running MySQL. However, when I apply http://www.cubrid.org/wiki_tutorials/entry/dropping-primary-key-error the update to our QA server, which is running SQL Server, the update fails on the db_drop_primary_key() function call. In particular, I am getting the following error: Failed: PDOException: SQLSTATE[42000]: [Microsoft][SQL Server Native Client 10.0][SQL Server]Cannot define PRIMARY KEY constraint on nullable column in table 'demo_table'.: ALTER TABLE [{demo_table}] ADD CONSTRAINT {demo_table}_pkey_technical PRIMARY KEY CLUSTERED (__pk); Array ( ) in db_drop_primary_key() (line 2869 of C:\inetpub\islandoratest\acquia-drupal7\includes\database\database.inc) I've reproduced the https://www.drupal.org/node/1580276 error in a small demo module that only creates a table, and then updates it. If you install the module, uncomment the commented hook_update_N() function and run update.php, the error should appear. I am using Drupal 7.14 and MSSQL Server 2008 R2. Let me know if there is more information you need.Files: CommentFileSizeAuthor sqlbugdemo.zip1.09 KBdyule Comments Comment #1 Uncle_Code_Monkey CreditAttribution: Uncle_Code_Monkey commented December 12, 2013 at 9:34pm Issue summary: View changes Related issues: +#2136849: Cannot define PRIMARY KEY constraint on nullable column The SqlSrv Drupal driver does not create the __pk field correctly and a patch is currently required to correct the issue. Unfortunately, the patch must be in place before "update.php" is run, so rolling back your database is the best solution (you did perform a backup before running update.php, right?). If you do not have the option of restoring from a backup, you can read through the comments of how to manually correct your database after applying the patch. Log in or register to post comments Comment #2 david_garcia CreditAttribution: david_garcia commented September 23, 2014 at 6:46pm Status: Active ยป Closed (fixed) Old versions for the driver where creating technical primary keys as nullable. This is fixed i
Resellers Standby Database Technical Perl RMAN Uncategorized VideoDatabase ReplicationDisaster RecoveryStandby DatabaseAbout DbvisitYou are here: Home / Database Replication / How to update primary keys (PK) when using logical replication23/01/2013 by Arjen Visser Leave a Comment How to update primary keys (PK) when using logical replication Most http://blog.dbvisit.com/how-to-update-primary-keys-pk-when-using-logical-replication/ people would agree with me when I say that updating primary keys (PK) is never a good idea because of foreign key constraints and integration or relationships with downstream and upstream systems. By updating the primary keys https://www.sqlite.org/lang_altertable.html these relationships can be broken.When using replication, there are further complications that make updating primary keys a very bad idea. However there are situations that dictate that primary keys must be updated. This could happen when foreign key there is a merger between different companies or when systems are consolidated or integrated. For example companyA buys companyB. Both companies may share the same customers but they are in different systems and have different primary keys. When the merger happens you may want to keep the systems separate but at least have the same primary in both systems so that they are easily recognized as being the same customer. So one on table violates of the systems requires updating of the primary keys.Let's take a simple example to see how primary keys can be updated when using logical based replication such as Golden Gate, Streams or Dbvisit ReplicateWe will take the scott.dept table as we are all familiar with this table. Anyone not familiar with this table please see ‘Oracle FAQ Scott table‘.The data in the table looks as follows:SQL> select * from dept; DEPTNO DNAME LOC ---------- -------------- ------------- 10 ACCOUNTING NEW YORK 20 RESEARCH DALLAS 30 SALES CHICAGO 40 OPERATIONS BOSTONThere is a foreign key relationship on the dept table, so if we try and update the primary key we get the following error:SQL> update dept set deptno = 12 where deptno = 10; update dept set deptno = 12 where deptno = 10 * ERROR at line 1: ORA-02292: integrity constraint (SCOTT.FK_DEPTNO) violated - child record foundTo update the primary key, the foreign key constraint on table EMP has to be disabled.SQL> alter table EMP disable constraint FK_DEPTNO; Table altered.Now that we have disabled the constraint, the primary key can be updated:SQL> update dept set deptno = 12 where deptno = 10; 1 row updated. commit;(note that the EMP table also has to be updated to set deptno from 10 to 12)Because we have (logical based) replica
column-def: show column-constraint: show conflict-clause: show expr: show raise-function: show select-stmt: show common-table-expression: show compound-operator: show join-clause: show join-constraint: show join-operator: show ordering-term: show result-column: show table-or-subquery: show foreign-key-clause: show literal-value: show signed-number: show type-name: show signed-number: show SQLite supports a limited subset of ALTER TABLE. The ALTER TABLE command in SQLite allows the user to rename a table or to add a new column to an existing table. The RENAME TO syntax changes the name of table-name to new-table-name. This command cannot be used to move a table between attached databases, only to rename a table within the same database. If the table being renamed has triggers or indices, then these remain attached to the table after it has been renamed. However, if there are any view definitions, or statements executed by triggers that refer to the table being renamed, these are not automatically modified to use the new table name. If this is required, the triggers or view definitions must be dropped and recreated to use the new table name by hand. Important Note: The 'ALTER TABLE ... RENAME TO ...' command does not update action statements within triggers or SELECT statements within views. If the table being renamed is referenced from within triggers or views, then those triggers and views must be dropped and recreated separately by the application. If foreign key constraints are enabled when a table is renamed, then any REFERENCES clauses in any table (either the table being renamed or some other table) that refer to the table being renamed are modified to refer to the renamed table by its new name. The ADD COLUMN syntax is used to add a new column to an existing table. The new column is always appended to the end of the list of existing columns. The column-def rule defines the characteristics of the new column. The new colu