Oneline bash命令转储和创建PostgreSQL数据库

Question

Sometimes I need to create a database called DB_DEV which is the exact copy (same scheme and data) as already existing DB . Id DB_DEV already exists, I want just to drop it and recreate it.

I used this command:

"pg_dump --clean -U user db | psql db_dev"

which seemed to work but I realised that it doesn't deletes tables which aren't present in db .

So if I run this command and then create a table "table" in DEV_DB and run the command again, the "table" is still present in DEV_DB database although in DB isn't.

Do you know how to modify the command to make it work correctly?

Answer 1

You could drop and recreate the database before restoring the dump:

psql postgres -c 'drop database db_dev; create database db_dev;'
pg_dump --clean -U user db | psql db_dev

Or:

dropdb db_dev
createdb db_dev
pg_dump --clean -U user db | psql db_dev