To empty a table of rows without destroying the table, use DELETE or TRUNCATE.. DROP TABLE always removes any indexes, rules, triggers, and constraints that exist for the target table. While building my PostgreSQL environment for the class, I had to write a couple utilities. In the PostgreSQL, no such functionality is available. But I am sharing two options for dropping all tables of schema or database of PostgreSQL. Description. To remove all tables from a database (but keep the database itself), you have two options. DROP SCHEMA removes schemas from the database.. A schema can only be dropped by its owner or a superuser. The key is you don’t want to delete the database itself. Description. ): Postgres 11 or later. that are contained in the schema, and in turn all objects that depend on those objects (see Section 5.13). To execute the DROP SCHEMA statement, you must be the owner of the schema that you want to drop or a superuser. To drop all functions (including aggregates) in a given schema (be careful with this! They do the following: Drops all the tables from a schema. This is usually good enough for development machines only. that are contained in the schema, and in turn all objects that depend on those objects. If you want to drop all tables of a schema, simply drop the schema. However, to drop a table that is referenced by a view or a foreign-key … Always create application schema and set search_path or for the user ALTER USER SET search_path TO , public to it. Maybe you are on a hosted solution where you don’t really have access to drop/restore a database. This will list all tables the current user has access to, not only those that are owned by the current user: select * from information_schema.tables where table_schema not in ('pg_catalog', 'information_schema') and table_schema not like 'pg_toast%' (I'm not entirely sure the not like 'pg_toast%' is actually needed though.) If all of your tables are in a single schema, this approach could work (below code assumes that the name of your schema is public) DROP SCHEMA public CASCADE; CREATE SCHEMA public; If you are using PostgreSQL 9.3 or greater, you may also need to restore the default grants. Note that the owner can drop the schema (and thereby all contained objects) even if he does not own some of the objects within the schema. CASCADE - Automatically drop objects (tables, functions, etc.) The answer to this question suggests I can use the CASCADE option of DROP SCHEMA to remove all a schema and all its tables, but warns:. Automatically drop objects (tables, functions, etc.) Being a novice to databases, I'm unsure about what objects may depend on objects within a schema. If you want to delete schema only when it is empty, you can use the RESTRICT option. Procedures have been added. By default, PostgreSQL uses RESTRICT. Postgres Drop Structures. Option 1: Drop the entire schema. This doesn’t happen every day, but once in a while you may find yourself needing to remove all the tables/functions/views from a PostgreSQL database. For example, I’m using Heroku’s Postgres service and dropping the … @reinink It's better to avoid using public schema for application tables as pg extensions, functions or other could overwrite something you define. DROP TABLE removes tables from the database. RESTRICT Refuse to drop the schema if it contains any objects. Only the table owner, the schema owner, and superuser can drop a table. You will need to re-create the schema and its permissions. I thought it might be helpful to mention that, as of 9.0, postgres does have the syntax to grant privileges on all tables (as well as other objects) in a schema: GRANT SELECT ON ALL TABLES IN SCHEMA public TO user; GRANT EXECUTE ON ALL FUNCTIONS IN SCHEMA public TO user; Here's the link. with one comment. 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