Updating keys in nagraedit

05 Oct

If you are using Oracle database which your target table existing, this Knowledge Module can fit your needs. To find the matching records, we need a set of key columns (depending on tables structure), which is set as “Update Key” on Target Datastore of our interface and can be defined in model.

There could be some alternative keys that sometimes you don’t need to use primary key (that is already created in database).

If when using your SFTP client on WP Engine, you receive a warning that your “host keys do not match” or that your host keys have changed since your last connection, it’s possible you may need to update host keys stored on your local machine.

In this article we’ll guide you through how to update host keys or delete them locally to help resolve this error message.

Each statement per collection is allowed per AQL query, and it cannot be followed by read operations that access the same collection, by traversal operations, or AQL functions that can read documents. Updating a document will modify the document's revision number with a server-generated value.

When updating an attribute with a null value, Arango DB will not remove the attribute from the document but store a null value for it.

The point of a primary key is that you can rely on it to uniquely identify a particular record, and it should be stable because the PK is used in foreign keys from related tables as well, so it's a lot easier to maintain these relationships if you don't keep changing the PK. and it should be stable because the PK is used in foreign keys from related tables as well, so it's a lot easier to maintain these relationships if you don't keep changing the PK.

That's why the primary key in my table is a combo of 2 fields. And I do want to be able to change homer Url field, because websites sometimes move to different adress, so being able to change stuff would be nice.

To get rid of attributes in an update operation, set them to null and provide the that are present in the to-be-updated document but not in the query will now be preserved.

Attributes that are present in both will be overwritten with the values specified in the query.

I have been thinking of creating a brand new Knowledge Module which will make an Incremental Update without using any UPDATE/DELETE SQL statements, only with inserts to increase performance.

Initially, I was thinking that there should be a second integration table, but when I started scrawling to figure out flow diagram and how Knowledge Module works, I realized that there is no need for a second integration table. Inserts the missing records (new records on source) to I$ flow table (if INSERT_NEW_ROWS option is set to true). Inserts the matching records (existing records on source) to I$ flow table (if UPDATE_EXISTING_ROWS option is set to true). Inserts the non-matching records (deleted records on source) to I$ flow table (if NOT_DELETE_NON_EXISTING_ROWS option is set to true). Wrap them up and truncate & insert target table from flow table and drop flow table (if DELETE_TEMPORARY_OBJECTS option is set to true). Analyze target (if ANALYZE_TARGET option is set to true).