In Oracle 18.0, it's not possible to change an existing column to an identity column. As a result, you can either follow the above-mentioned process of copying the existing values and dropping the original column or create a new table with the identity column and then transfer the data. F...
Also, you can make some modifications in the script generated by select..., puting some prompt´s or dbms_output.put_line... to say what your are doing, like, "alter table xxx add column xxx number;" and spooling all output of this script to verify that everything...
In my environment I have a table with around 5 million records and two indexes. I want to know what will be the effect on the existing indexes, if i add a new column to this table i.e. whether indexes are dropped and created again or updated somehow or there is no effect at al...
methods.add(mig.getMigrateTableToMysqlInfo()); In the next step, you have to implement the private Method getMigrateTableToMysqlInfo(). You can take a look at how I've implemented this method in the MigrationOracle.java class. 3 important things. *) method.setName("migrateTableToMysq...
1. create a table 2. populate the table with data 3. add the identity primary key column Test Case: Due to this issue, users cannot create an identity columns on existing tables with data in it. Changes Cause Register My Oracle Support provides customers with access to over a million know...
Information in this document applies to any platform. Symptoms Error ORA-01408: such column list already indexed" when adding new XMLTYPE column appears when performing the steps below 1. Create table with two schema-based XMLTYPE columns (doc1, doc2) stored as OBJECT RELATIONAL. ...
>The new column has to fit on the original page. Does that mean the entre table/leaf node pages have to be re-organised ? That way there is no 'row chaining' like in oracle which causes performance issues due to reading from addition pointer pages, correct?
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I'm using phpMyAdmin to administer a MySQL database on a hosted account. My question is: are there any "gotchas" that I should watch out for when I want to add a new column to an existing table that is live and potentially in use? (99.9% of the access to it is reading only) ...