Compact SQL

A simple macros allows to write SQL queries for Postgres which will be compacted (and optionally checked) at compile-time.

Dependency

[dependencies]
compact_sql = "0.0.3"

Pretty error

Use pretty-errors feature (requires unstable Rust version) if you can get better errors with pointing to a concrete error span.

[dependencies]
compact_sql = { version = "0.0.3", features = ["pretty-errors"] }

Using Compact SQL

Generate just an SQL string

use compact_sql::pg_sql;

fn main() {
    let sql = pg_sql! {
        SELECT
            relname,
            relnamespace,
            format("%I", oid),
        FROM
            pg_catalog.pg_class
        WHERE
            oid = {var_oid}::oid
    };
    assert_eq!(
        sql,
        "SELECT relname,relnamespace,format('%I',oid)FROM pg_catalog.pg_class WHERE oid=$1::oid"
    );
}

Note! There are allowed commas between keywords (more convenient for VCS), named parameters in curly braces are replaced with "$x" Postgres numbered parameters (the same number for the same names).

Common keywords like "SELECT", "AS", etc. are required (as warnings) to be uppercase.

Test SQL queries

If you want to check queries (via "prepare") you can define ENVs for the DBMS:

• TEST_PG_HOST
• TEST_PG_PORT (optional; default: 5432)
• TEST_PG_USER (optional; default: "postgres")
• TEST_PG_PASS (optional; default: "")
• TEST_PG_DATB

License

Licensed under either of

• Apache License, Version 2.0, (LICENSE-APACHE or http://www.apache.org/licenses/LICENSE-2.0)
• MIT license (LICENSE-MIT or http://opensource.org/licenses/MIT)

at your option.

Contribution

Unless you explicitly state otherwise, any contribution intentionally submitted for inclusion in the work by you, as defined in the Apache-2.0 license, shall be dual licensed as above, without any additional terms or conditions.