upsert | Transparently creates functions for MySQL | Database library

This is my problem : I have a document ( let's call it root) containing an array of another documents (stick), that contain another array of another documents (leaf).

Or simply said : root{ stickChain[leaveschain1[ leaf1, leaf2],leaveschain2[ leaf1, leaf2] ]}

I have access to root _id, stick _id, or whatever it is needed to identify each document.

Basically, the best result I've come so far is, when creating my leaves documents, is to store then at the same level tha sticks, or in another word I've come to create an array of leaves in root.

I'm working in javascript and using mongoose

This is the line I've used:

The recommended way of doing an upsert in a delta table is the following.

I'm using Angular 11 and I'm going to detect if my component has any child element with [footer] attribute; then if there is no child element with that selector, I will not show modal-footer.

bs-modal.component.html:

I am using CentOS-6 with Python 3.8, PostgreSQL 12 and PyGreSQL 5.2.2.

With older versions, I had a function like the following. Back then an update raised an exception if the row didn't already exist, so upon exception, I would insert the row of data.

I have a functionality to store data to a couchbase array. I am using the reactive collection in couchbase 3.0 sdk.

With the below sample I am able to store the data, but I am getting CasMismatchException printed in the logs. But as it is an expected one, I don't want it to be printed, how can I achieve that ?

Good Evening, I am using the MERN stack to create an application. I am using the Stripe API to gather invoices and save some information about the invoice in MongoDB. Right now I have a function that updates my DB with any object that does not exist and I have a delete function that deletes any documents in my DB that have the paid: true. when an invoice is paid Stripe marks it paid, when its paid I want to delete it from my DB. What happens now is that I delete it and then update function runs and just puts it right back.

The data in my DB and from stripe are an array of objects:

I am reading at https://ci.apache.org/projects/flink/flink-docs-release-1.13/docs/connectors/table/upsert-kafka/.

It says that:

As a sink, the upsert-kafka connector can consume a changelog stream. It will write INSERT/UPDATE_AFTER data as normal Kafka messages value, and write DELETE data as Kafka messages with null values (indicate tombstone for the key).

It doesn't mention that if UPDATE_BEFORE message is written to upsert kafka,then what would happen?

In the same link (https://ci.apache.org/projects/flink/flink-docs-release-1.13/docs/connectors/table/upsert-kafka/#full-example), the doc provides a full example:

I have a row in my postgresql database that I want to update.

I have an issue where I do an update on a document, however, the update creates a new document and I'm not upserting in my update.

This is my testing code. I do a find to see if the document exists by checking if "lastseen" doesn't exist: