This is pgx v0.2.0. It represents months of work on new tooling around automatic SQL schema generation, Postgres 14 support, various safety improvements, and some user-facing (breaking) API changes.

We thank everyone that helped test the betas and are excited to finally release v0.2.0!

Upgrading

Please make sure to run cargo install cargo-pgx and update all pgx extension Cargo.toml file "pgx*" dependency versions to 0.2.0.

Features

• PostgreSQL v14 support (#245)
• The pgx SQL generation system has been rewritten! It now uses the proc macro system and has several breaking changes. Please refer to the migration guide below. (#165, #197)
• The PostgreSQL uuid type is now supported! (#172)
• cargo pgx test now accepts an optional testname. cargo pgx test specific::path works just like cargo test! (#186)
• pgx-pg-sys now suggests you install rustfmt if you don't have it. (#193)
• cargo pgx schema will now emit informational messages if extension Cargo.toml settings are not what is expected. (#209)
• cargo pgx test now has a --workspace argument matching the equivalent on cargo test. (#169)

Other changes

• fix: Marked several functions as unsafe as they had undefined behavior when passed invalid pointers. (#210, #216, #217, #223, #224, #226)
• Type oids don't need to be looked up in functions that don't use them. (#168)
• Added an aggregate example. (#187)
• Updated many of our dependencies. (#191)
• More documentation has been added to several macros and SQL generation related types. (#192, #158, #219)
• An articles/ directory now exists in the repo and includes links to different articles written about pgx. (#198)
• Document our MSRV (#157)
• Fixed an accidental circular dependency in 0.2.0-beta.0 (unpublished).
• Resolve undefined behavior around exported function symbols (#241)
  • As a result there is now pgx::direct_function_call() and pgx::direct_pg_extern_function_call() for dynamically calling internal Postgres functions and functions you declare as #[pg_extern].
• Fix up Darwin linking issues (#244)
• Resolve issues with sql entity graph generation (#236, #260)
• #[pg_extern] functions with lifetimes no longer cause compiler errors (#268)
• Add a --no-schema flag to cargo pgx run/test/install which avoids generating the schema again. This can help speed up the development cycle if you haven't made any code changes that would affect the SQL schema (#262)
• #[pg_extern] no longer fails with return types with lifetimes inside Option<...> (#270)
• PgBox has been rewritten to be the size of a single pointer (usize). Its user-facing API is the same, but you may need to add declare an associated type of AllocatedByPostgres or AllocatedByRust depending on usage context
• The Internal type is no longer generic, and its API has been changed to provide typed getter functions. It is also documented.

Migration Guide

1. Update your cargo-pgx: cargo install --force cargo-pgx --version 0.2.0-beta.0

2. In your Cargo.toml, set crate-type to include "rlib" and profile.dev.lto to be "thin":

   [lib]
   crate-type = ["cdylib", "rlib"]
   
   [profile.dev]
   lto = "thin"

3. Tell cargo-pgx to force update your .cargo/ and src/bin files it needs: cargo pgx schema -f

4. Remove any sql/*.generated.sql files, as well as the load-order.txt.

5. For each sql/*.sql remaining, insert extension_sql_file!("../sql/that_file.sql"); into your src/lib.rs

6. If the files depend on entities which already exist, you might need to set a requires attribute:

   extension_sql_file!("../sql/that_file.sql", requires = [ dogs::parts::Floof, some_fn, ]);

7. For any mod floof { fn boop() { todo!() } } style blocks you were using to infer schema name (making that function floof.boop), decorate the schema with #[pg_schema]:

   #[pg_schema]
   mod floof {
       fn boop() {
           todo!()
       }
   }

8. For any functions have a custom sql block for (like below), update that to use pgxsql now:

   /// ```sql <-- Change this to `pgxsql`
   /// CREATE OR REPLACE FUNCTION  ....
   /// ```
   #[pg_extern]
   fn dot_dot_dot() { todo!() }

9. Run cargo pgx schema again!

If you have any trouble, try running cargo pgx schema -v and investigating the output. We made sure to update the cargo doc output of pgx with updated usage for the various macros and derives, they might have some advice, too.

You can ask us questions via issues here or Discord if you get stuck.

Thanks!

Thanks to @JLockerman (from @timescale) & @kpumuk for contributions! Also thanks to our early testers @rustprooflabs and @comdiv.