Amazon Aurora PostgreSQL SELECT INTO OUTFILE S3 - postgresql

We are trying to export data from an Amazon Aurora PostgreSQL database to an S3 buckets. The code being used is like this:
SELECT * FROM analytics.my_test INTO OUTFILE S3
's3-us-east-2://myurl/sampledata'
FIELDS TERMINATED BY ','
LINES TERMINATED BY '\n';
MANIFEST ON
OVERWRITE ON;
All permissions have been set up but we get the error
SQL Error [42601]: ERROR: syntax error at or near "INTO" Position: 55
Does this only work with a MySQL database?

It is fairly new feature on Aurora Postgres, but it is possible to export the query result into a file on s3: https://docs.aws.amazon.com/AmazonRDS/latest/AuroraUserGuide/postgresql-s3-export.html#postgresql-s3-export-file
The syntax is not the same as for MySQL though. For Postgres it is:
SELECT * from aws_s3.query_export_to_s3('select * from sample_table',
aws_commons.create_s3_uri('sample-bucket', 'sample-filepath', 'us-west-2')
);

I believe saving SQL select output data in S3 ONLY works for Amazon Aurora MySQL DB. I don't see any reference in the official documentation that mentions the same for Amazon Aurora PostgresSQL.
Here are snippets from official documentation that I referred to
Integrating Amazon Aurora MySQL with Other AWS Services
Amazon Aurora MySQL integrates with other AWS services so that you can
extend your Aurora MySQL DB cluster to use additional capabilities in
the AWS Cloud. Your Aurora MySQL DB cluster can use AWS services to do
the following:
Synchronously or asynchronously invoke an AWS Lambda function using
the native functions lambda_sync or lambda_async. For more
information, see Invoking a Lambda Function with an Aurora MySQL
Native Function.
Load data from text or XML files stored in an Amazon Simple Storage
Service (Amazon S3) bucket into your DB cluster using the LOAD DATA
FROM S3 or LOAD XML FROM S3 command. For more information, see Loading
Data into an Amazon Aurora MySQL DB Cluster from Text Files in an
Amazon S3 Bucket.
Save data to text files stored in an Amazon S3 bucket from your DB
cluster using the SELECT INTO OUTFILE S3 command. For more
information, see Saving Data from an Amazon Aurora MySQL DB Cluster
into Text Files in an Amazon S3 Bucket.
Automatically add or remove Aurora Replicas with Application Auto
Scaling. For more information, see Using Amazon Aurora Auto Scaling
with Aurora Replicas.
Integrating Amazon Aurora PostgreSQL with Other AWS Services
Amazon Aurora integrates with other AWS services so that you can
extend your Aurora PostgreSQL DB cluster to use additional
capabilities in the AWS Cloud. Your Aurora PostgreSQL DB cluster can
use AWS services to do the following:
Quickly collect, view, and assess performance for your Aurora
PostgreSQL DB instances with Amazon RDS Performance Insights.
Performance Insights expands on existing Amazon RDS monitoring
features to illustrate your database's performance and help you
analyze any issues that affect it. With the Performance Insights
dashboard, you can visualize the database load and filter the load by
waits, SQL statements, hosts, or users.
For more information about Performance Insights, see Using Amazon RDS
Performance Insights.
Automatically add or remove Aurora Replicas with Aurora Auto Scaling.
For more information, see Using Amazon Aurora Auto Scaling with Aurora
Replicas.
Configure your Aurora PostgreSQL DB cluster to publish log data to
Amazon CloudWatch Logs. CloudWatch Logs provide highly durable storage
for your log records. With CloudWatch Logs, you can perform real-time
analysis of the log data, and use CloudWatch to create alarms and view
metrics. For more information, see Publishing Aurora PostgreSQL Logs
to Amazon CloudWatch Logs.
Ther is no mention of saving data to S3 for PostgresSQL

Related

How to restore exported RDS snapshot from S3 to RDS cluster

I have an AWS RDS Aurora PostgreSQL cluster (compatible with PostgreSQL 13.4).
I successfully followed this tutorial to back up my PostgreSQL RDS aurora cluster snapshot to S3, and it seems that all the data is backed up to s3.
Now I'm trying to restore the exported snapshot from S3 to PostgreSQL RDS cluster, and I couldn't find explanation how to do it.
Any idea how to do it? maybe I need to first restore the exported data from S3 to snapshot, and then connect it to to RDS, or any other way?
The RDS Snapshot to S3 export feature is not intended for additional backups of your data. It is intended to convert your data to Parquet for use in analytics tools like Redshift or Athena. Some data type conversion happens during this export process.
There is currently no method available to import these Parquet files back into RDS. You would have to write some code yourself to read the Parquet files and insert the data back into a running RDS instance if you needed that.
If you are just wanting a secondary backup of your RDS instance in addition to the RDS snapshots, you could either look into cross-region or cross-account copies of your RDS snapshots, or look into using the AWS Backup service.

loading one table from RDS / postgres into Redshift

We have a Redshift cluster that needs one table from one of our RDS / postgres databases. I'm not quite sure the best way to export that data and bring it in, what the exact steps should be.
In piecing together various blogs and articles the consensus appears to be using pg_dump to copy the table to a csv file, then copying it to an S3 bucket, and from there use the Redshift COPY command to bring it in to a new table-- that's my high level understanding, but am not sure what the command line switches should be, or the actual details. Is anyone doing this currently and if so, is what I have above the 'recommended' way to do a one-off import into Redshift?
It appears that you want to:
Export from Amazon RDS PostgreSQL
Import into Amazon Redshift
From Exporting data from an RDS for PostgreSQL DB instance to Amazon S3 - Amazon Relational Database Service:
You can query data from an RDS for PostgreSQL DB instance and export it directly into files stored in an Amazon S3 bucket. To do this, you use the aws_s3 PostgreSQL extension that Amazon RDS provides.
This will save a CSV file into Amazon S3.
You can then use the Amazon Redshift COPY command to load this CSV file into an existing Redshift table.
You will need some way to orchestrate these operations, which would involve running a command against the RDS database, waiting for it to finish, then running a command in the Redshift database. This could be done via a Python script that connects to each database (eg via psycopg2) in turn and runs the command.

AWS, RDS: How to migrate +40GB Postgres database from AWS ec2 instance to RDS using hard disk files?

It seems migrating Postgres database using data directory is viable:
How To Move a PostgreSQL Data Directory to a New Location on Ubuntu 16.04
But in case of RDS because SSHing to the RDS is not possible I am here to ask if there is any way to speed up my Postgres database migration.
You could use the AWS Database Migration Service:
AWS Database Migration Service (AWS DMS) is a cloud service that makes it easy to migrate relational databases, data warehouses, NoSQL databases, and other types of data stores. You can use AWS DMS to migrate your data into the AWS Cloud, between on-premises instances (through an AWS Cloud setup), or between combinations of cloud and on-premises setups.

Adding Amazon RDS as slave to external postgresql

We want to migrate an external postgresql database into amazon RDS however for some time we need to keep both of them working and in sync. I have found ways of doing it but only with RDS being the master and not the Slave. Is there a good and viable solution which could help us?
There is AWS service Database Migration Service which can be used to migrate external databases to Amazon AWS RDS.
https://docs.aws.amazon.com/dms/latest/userguide/Welcome.html
It supports postgresql 9.4 and higher.
There are different task types and you need to use Ongoing Replication to keep them sync.
https://docs.aws.amazon.com/dms/latest/userguide/CHAP_Task.CDC.html
To setup that task you need to enable Logical Replication for source database

AWS DMS to migrate FROM RDS Postgres

can I migrate from AWS RDS to standalone Postgres instance using AWS DMS?
I RTFM, but It does not state anywhere clearly If I can or not. In theory migration should be the same - create supporting scheme in RDS and move on. But have anyone done it?
Well, from AWS DMS manual:
AWS Database Migration Service (AWS DMS) can migrate your data to and from most widely used commercial and open-source databases such as Oracle, PostgreSQL, Microsoft SQL Server, Amazon Redshift, Amazon Aurora, MariaDB, and MySQL. The service supports homogeneous migrations such as Oracle to Oracle, and also heterogeneous migrations between different database platforms, such as Oracle to MySQL or MySQL to Amazon Aurora. The source or target database must be on an AWS service.
In your case the source is on an AWS service, and if by "standalone" you mean a PostgreSQL instance on EC2 machine, then your target is as well. So, based on that, then answer should be "yes".
Yes, that is possible. We have moved data from RDS Postgres to Postgres Installed on EC2 Instance using DMS and works great so far. Make sure to create endpoints for the source/target and create a replication instance and you are good to go