graphql-engine/server/src-rsr/migrations/27_to_26.sql

ALTER TABLE hdb_catalog.event_log DROP COLUMN archived;
DROP INDEX hdb_catalog.event_log_delivered_idx;
Add downgrade command (close #1156) (#3760) * Add downgrade command * Add docs per @lexi-lambda's suggestions * make tests pass * Update hdb_version once, from Haskell * more work based on feedback * Improve the usage message * Small docs changes * Test downgrades exist for each tag * Update downgrading.rst * Use git-log to find tags which are ancestors of the current commit Co-authored-by: Vamshi Surabhi <0x777@users.noreply.github.com> 2020-02-07 14:03:12 +03:00			`ALTER TABLE hdb_catalog.event_log DROP COLUMN archived;`
			`DROP INDEX hdb_catalog.event_log_delivered_idx;`