how to import data files from s3 to postgresql rds

Question

I am very new to AWS, and Postgresql.

1. I have created a Postgresql db (using rds on aws)
2. I have uploaded several documents to multiple s3 buckets
3. I have a EC2 (Amazon Linux 64 bit) running

I tried to use a data pipeline, but nothing seems to be available (template) for Postgres. I can't figure out how to connect to my RDS instance and import/export data from postgres.

I assumed that I could use EC2 to grab from my S3 bucket and import into Postgres in lieu of no data pipeline template being available. If it is possible I have no idea how.. Please advise if possible..

Answer 1

S3 -> RDS direct load is now possible for PostgreSQL Aurora and RDS PostgreSQL >= 11.1 as aws_s3 extension.

• Amazon Aurora with PostgreSQL Compatibility Supports Data Import from Amazon S3
• Amazon RDS for PostgreSQL Now Supports Data Import from Amazon S3

Parameters are similar to those of PostgreSQL COPY command

psql=> SELECT aws_s3.table_import_from_s3(  'table_name', '', '(format csv)',  'BUCKET_NAME', 'path/to/object', 'us-east-2' ); 

Be warned that this feature does not work for older versions.

Answer 2

I wish AWS extends COPY command in RDS Postgresql as they did in Redshift. But for now they haven't and we have to do it by ourselves.

1. Install awscli on your EC2 box (it might have been installed by default)
2. Configure your awscli with credentials
3. Use aws s3 sync or aws s3 cp commmands to download from s3 to your local directory
4. Use psql command to \COPY the files into your RDS (requires \ to copy from client directory)

Example:

aws s3 cp s3://bucket/file.csv /mydirectory/file.csv psql -h your_rds.amazonaws.com -U username -d dbname -c '\COPY table FROM ''file.csv'' CSV HEADER'