Compilation error on updating join

[Micah Wylde]

This query produces a compilation error due to overlapping field names in the output struct of the join:

CREATE TABLE m1 (
    count INT,
    status_code TEXT
) WITH (
    connector = 'kafka',
    format = 'json',
    type = 'source',
    bootstrap_servers = 'kafka:9092',
    topic = 'logs'
);

CREATE TABLE m2 (
    count INT,
    status_code TEXT
) WITH (
    connector = 'kafka',
    format = 'json',
    type = 'source',
    bootstrap_servers = 'kafka:9092',
    topic = 'logs'
);

SELECT m1.count as m1_count, m2.count as m2_count, m1.status_code as status_code
FROM m1 LEFT JOIN m2
ON m1.status_code = m2.status_code;

The compilation error:

error[E0124]: field `count` is already declared
   --> pipeline/src/main.rs:470:5
    |
468 |     pub count: Option<i32>,
    |     ---------------------- `count` first declared here
469 |     pub status_code: Option<String>,
470 |     pub count: Option<i32>,
    |     ^^^^^^^^^^^^^^^^^^^^^^ field already declared

error[E0124]: field `status_code` is already declared
   --> pipeline/src/main.rs:471:5
    |
469 |     pub status_code: Option<String>,
    |     ------------------------------- `status_code` first declared here
470 |     pub count: Option<i32>,
471 |     pub status_code: Option<String>,
    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ field already declared

[Micah Wylde]

Fixed in #288