I have a database hosted using Amazon's RDS service and I am attempting to write a web service that will update said database. The problem I am having is that it will not let me use the COPY command as I get this error: "ERROR: must be superuser to COPY to or from a file". I am using the only user I have made for the database and I am fairly certain it has superuser access. I can, however, use PGAdmin's import tool to import the data which, when looking at the log, uses almost the exact same command as I do. The only difference is instead of the file path it has stdin. How can I fix this error?
You're using:
COPY tablename FROM 'filename';
this won't work - RDS has no idea what 'filename' is.
You must use the psql command's \copy, which copies from the local client, or PgAdmin-III's "import data" option.
Workaround without using psql
1) Import data locally to a temporary table using simple copy command
2) Right click the table in the pgAdmin III object browser and select "Backup..."
3) Set the format to Plain and save the file as a .sql file
4) Click on the Dump Options #1 Tab and check Data
5) Click on the Dump Options #2 Tab and check Use Column Inserts and Use Insert Commands
6) Click Backup button
7) Now you can open the sql file and run it in your RDS server
Alternatively you can use the below command to generate the sql file
pg_dump --host localhost --port 5432 --username "postgres" --no-password --format plain --section data --inserts --column-inserts --file "C:\test\test.sql" --table "public.envelopes" "testdb"
来源：https://stackoverflow.com/questions/25206313/copying-csv-to-amazon-rds-hosted-postgresql-database