change-data-capture | Change Data Capture plugins for CDAP | Change Data Capture library
kandi X-RAY | change-data-capture Summary
kandi X-RAY | change-data-capture Summary
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Top functions reviewed by kandi - BETA
- Return the appropriate Schema for the given SQL type name .
- Update the kudu table schema .
- Convert a union into an Avro value
- Normalize DML record .
- Configure the pipeline .
- Sets the put field to the given put field .
- Do a compute operation .
- Returns the column encoding .
- Load offsets before .
- Validates configuration properties .
change-data-capture Key Features
change-data-capture Examples and Code Snippets
Community Discussions
Trending Discussions on change-data-capture
QUESTION
I have a classic Spring Boot Application connected to a MySQL database.
Can I use r2dbc driver and spring data r2dbc to develop another application that listens to the database changes like a change data capture?
I've studied the r2dbc driver documentation, but I don't understand if they produces reactive hot streams or only cold streams. If it is not possible I believe that I should use Debezium, like I found in this article.
Thanks a lot
...ANSWER
Answered 2021-Mar-23 at 11:15R2DBC is primarily a specification to enable reactive/non-blocking communication with your database. What an R2DBC driver is capable of pretty much depends on your database.
The Longer VersionR2DBC specifies a set of interfaces including methods where every database conversation is activated through a Publisher. R2DBC has no opinion on the underlying wire protocol. Instead, a database driver implementing R2DBC has to stick to its database communication protocol. What you get through JDBC or ODBC is pretty much the same as what you can expect from an R2DBC driver.
There are smaller differences: some JDBC drivers require polling for data (such as Postgres Pub/Sub notification) whereas, in R2DBC, a notification stream can be consumed without a polling thread as all I/O is based on listening on the receive buffers and emitting data once the driver receives data. In contrast, JDBC (and pretty much all imperative API) require someone to call a method to consume/obtain data.
I'm not sure how CDC works with MySQL; I think you need to scan (poll) the BINLOG using MySQL commands or the MySQL protocol. Right now, the R2DBC MySQL driver doesn't support BINLOG polling.
Postgres has similar functionality (Logical Decode). It is supported by R2DBC Postgres (see the documentation of Logical Decode using R2DBC Postgres). In Postgres, the server pushes the replication log to the client, which gives you a hot stream as logical decode subscribes to the replication log.
The gist is pretty much that it depends on the actual database technology.
QUESTION
I'm trying to get data from an on-premise SQL Server 2016 Enterprise Edition instance into the cloud. I have hit a roadblock, so if anyone has any guidance as to a workaround, I'd really appreciate you sharing your knowledge!
I'm planning on using AWS Database Migration Service (aws.amazon.com), which I'm going to call 'DMS' for this post. The database must remain on-premise for regulatory reasons, so I have a need to continually capture data from this database and ship it to the cloud. I'm going to use Change Data Capture (docs.microsoft.com) for this aspect.
This use case is explicitly called out in the DMS docs, so it seems like the appropriate tool. In addition, I see from this 2018 blog post that Kinesis Data Streams are a valid target for DMS. That's great; I want to use Kinesis to process the data from CDC downstream.
The problem is that in the Terraform docs for DMS targets (terraform.io) don't give Kinesis as an endpoint option type. Here's an issue on the Terraform github project (github.com) where someone else has noticed the same thing. And an associated PR (github.com), which looks like it should provide a fix. Although it seems to depend on another fix, so I'm not holding my breath.
Now, some some specific questions:
- In the thread below the github issue, someone mentions using a mixture of Cloudformation and Terraform. Some quick searching throws up aws_cloudformation_stack (terraform.io) as a means to achieve this. Is that correct?
- Should I in fact hold my breath for Hashicorp to merge in the DMS fixes?
- Are there any other ways through this problem that I haven't thought of?
ANSWER
Answered 2019-Dec-11 at 10:45Not sure of the SO etiquette around answering your own question, (Meta is a little unclear (meta.stackexchange.com))[https://meta.stackexchange.com/questions/17845/etiquette-for-answering-your-own-question] so here goes:
Connecting DMS and Kinesis Data Streams with Terraform + CloudFormation
aws_cloudformation_stack does work. The CloudFormation is actually relatively simple. The first code block below shows my Terraform. I'm using Terraform 0.12's templatefile function to interpolate parameters into the CloudFormation JSON. Where you see or similar, those are placeholders for conventional identifiers for my environment that I'd rather not share.
QUESTION
After following the instructions listed here debezium sqlserver connector and how to activate change data capture
And also making sure that the SQL-Agent is running, debezium is still not working ( streaming data to Kafka).
...ANSWER
Answered 2019-Jul-06 at 18:09It turns out that CDC is broken in the initial release of sql-server 2017
Updating to cumulative update 4 or higher solves this.
Took a lot of debugging to figure this out, but I learned A LOT about how sql-server works and how the debezium driver works.
QUESTION
I'm building a NiFi dadaflow, and I need to get the data changes from a MySql database, so I want to use the CaptureChangeMySQL processor to do that.
I get the following error when I run the CaptureChangeMySQL processor and I don't see what's causing this :
Failed to process session due to Could not connect binlog client to any of the specified hosts due to: BinaryLogClient was unable to connect in 10000ms: org.apache.nifi.processor.exception.ProcessException: Could not connect binlog client to any of the specified hosts due to: BinaryLogClient was unable to connect in 10000ms
I have the following controller services enabled :
- DistributedMapCacheClientService
- DistributedMapCacheServer
But I'm not sure if they are properly configured :
DistributedMapCacheServer properties
DistributedMapCacheClientService properties
In MySql, I have enabled the log_bin variable, by default it wasn't. I checked and I have indeed some binlog files created when data change.
So I think the issue is with the controller services and how they connect, it's not clear to me.
I searched for tutorials about how to use this NiFi processor but I couldt not find how to fix this error. I looked mainly at this one : https://community.hortonworks.com/articles/113941/change-data-capture-cdc-with-apache-nifi-version-1-1.html but it did not helped me.
Does anyone have already use this processor to do CDC?
Thank you in advance.
...ANSWER
Answered 2019-May-28 at 07:51I found what was wrong : I was trying to connect to the wrong port for the MySQL Host of the CaptureChangeMySQL processor :x
QUESTION
Nested fields in BigQuery are selected using the dot operator.
I have change-data-captured tables with schemas that have a lot of nested fields. I would like to do something like this:
...ANSWER
Answered 2018-Mar-10 at 07:45The only explanation I see for your problem to exist - is if you are still using BigQuery Legacy SQL. So, yes, in this case you will get below if use just SELECT field_name.*
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