I have a table, and I already have some data in it.
But when I select from the table, it said "failed to decrypt column encryption key".
why?
the error
May the client does not have client master key
you can check the CMK environment variables.
Related
I'm using CockroachDB version 22.1 and have a table with many columns. When I try to run ALTER TABLE ... DROP COLUMN I get the error ERROR: unable to encode table key: <nil>. How can I fix this?
This is a bug that is fixed in patch 22.1.7, so the easiest way to fix this is to upgrade to that version or higher. It manifests when a table has a virtual column as part of its primary key, which most often happens when using a hash-sharded primary key index.
I am using talend for ETL I don't have enough experience in this, I am having two tables for example- account and account_roles account table is having id, name, password etc fields and account_roles table is having account_id which is f.k to account table's pk. and one more field.
Both the fields in account_roles are having duplicates, I want to save account_roles in destination with update and insert logic using talend.
But I am getting error as I don't have any table that can be treated as primary key in the account_roles table, so talend can't update or insert it.
How I deal with this situation I tried tDBOutput advance option use_field_option but still it requires unique entries.
Is there any possible solution to this issue, I also want to know if I can make table Foreign key in the account_roles table will it work then? If yes then How to make F.k in talend OPen studio is my second question.
Attaching Snapshots of my tables and tMap below -
I want to know the way I can put my tables into database if I don't have any primary key! Kindly help me.
First question
I think you should place the primary key in the physical account_roles table. Talend will use the key indication of the dbOutput component, and the physical key of the table.
In order to delete duplicates rows, you can also use a tUniqRow before the dbOutput: The key you indicate in the UniqRow is not directly linked to the database; this is only the key on which tUniqRow will be based.
Second question
It's not possible to delegate the f.k. verification to Talend. But you can do this verification in your database by placing foreign keys in your table. If an id is not present in the reference table, the database returns an error that is returned by Talend.
How to encrypt a column in Oracle without giving the key to Oracle Server? I need to encrypt a column in my table, but I don't want that the DBA can know the key, is it possible to do this and how ?
A typical way to do this would be to just encrypt the data from an application connected to your Oracle database. Then, insert/update your Oracle table, making sure to keep the key away from Oracle. In terms of where you might want to store the key, Amazon's S3 would be one option, or you could keep it on premise somewhere in a place not accessible by your DBAs.
The diagram has over 40 tables, most of them have a primary key defined.
For some reason there is this one table, which has a primary key defined, but that's being ignored when I export the model to a DDL script.
This is the "offending" key (even though it's checked it is nowhere to be found on the generated DDL script):
Has anybody had the same problem? Any ideas on how to solve it?
[EDIT] This is where the key is defined:
And this is the DDL preview (yes, the primary key shows up there):
This is what happens if I try to generate the DDL for just that table (primary key still not generated):
I was finally able to identify and reproduce the problem.
It was a simple conflict of constraints.
Table MIEMBROS had a mandatory 1 to n relationship (foreign key) from another table on its primary key column and vice-versa (there was a foreign key on MIEMBROS against the other table's primary key).
This kind of relationship between two tables makes it impossible to add a record to any of them: The insert operation will return an error complaining about the foreign key restriction pointing the other table.
Anyway I realized that one of the relationships was 0 to n so I simply unchecked the "mandatory" checkbox on the foreign key definition and everything went fine.
So, in a nutshell: The Data Modeler "fails" silently if you are defining a mutual relationship (two foreign keys, one on each table against the other table) on non nullable unique columns, by not generating the primary key of one of the tables.
Such an odd behavior, if you ask me!
"This kind of relationship between two tables makes it impossible to add a record to any of them: The insert operation will return an error complaining about the foreign key restriction pointing the other table."
Actually, if you have deferred constraints, this is not impossible. The constraints can be enforced, for example, at commit time rather than immediately at insert time.
From the Data Modeler menu under File, I used Export -> DDL File. The keys appeared in the DDL, then when I went back to the diagram and did DDL Preview, it showed all the missing stuff.
First of, this is a pretty basic question but I cant seem to find a basic tutorial on how to use the software.
If i have a table named COUNTRY with the field region_id
and then another table named REGION with a primary key as region_id.
I want to set the region_id field in COUNTRY table as a foreign key.
Are the following steps correct?
Go to constraints, add a new foreign key.
Select COUNTRY as table
Change local column to region_id
![enter image description here][1]
Am I doing it correctly? if not, where am i going wrong
Yes, This is the correct procedure.
If you want your foreign key to have additional behavior (e.g., ON DELETE CASCADE), you can use the "on delete" drop-down in the wizard.
I cant seem to find a basic tutorial on how to use the software.
Have you looked at the Oracle Learning Library for SQL Developer tutorials?
If you search for: Getting Started with Oracle SQL Developer 4.0 you will find a tutorial that gets you up and running SQL Developer, this tutorial includes how to create Foreign Key Constraints.