FEAT: ALTER TABLE support

[StevenACoffman]

Currently adding support for BigQuery to golang-migrate is hampered by an inability to test DDL functionality in a Go emulator. This would just require support for a subset of ALTER TABLE such as:

ALTER TABLE products ADD COLUMN price DECIMAL;

ALTER TABLE products DROP COLUMN price;

See golang-migrate/migrate#881

[goccy]

@StevenACoffman Thank you for your reporting.
Currently, I'm looking into supporting DDL. I plan to start with the ALTER statement. 👍

[myhau]

Hello @StevenACoffman, @goccy :)

Have you made some progress on this issue?

I'm asking as I started tinkering with with implementation (it's needed to support table modification in bigquery emulator), but maybe you already have some "prototype" that works locally?