nederlandskie/sql/02_add_subscription_host.sql

ALTER TABLE SubscriptionState ADD COLUMN host TEXT DEFAULT 'wss://bsky.social';
ALTER TABLE SubscriptionState ALTER COLUMN host DROP DEFAULT; 
ALTER TABLE SubscriptionState DROP CONSTRAINT subscriptionstate_service_key;
ALTER TABLE SubscriptionState ADD CONSTRAINT service_host_unique UNIQUE(service, host);
Store Bluesky firehose host as part of subscription state The host has changed recently and the cursors are, apparently, incompatible with each other, so we need to migrate to the new one, and this seems like the easiest way to do it: 1. Store the host as part of the subscription state 2. Roll out the version that uses that new column as part of all queries 3. Switch to the new host 4. Roll out the version with the new host - The new instance will start processing messages with a 0 cursor and so start anew - The old instance will die off 2023-11-05 17:57:03 +00:00			`ALTER TABLE SubscriptionState ADD COLUMN host TEXT DEFAULT 'wss://bsky.social';`
			`ALTER TABLE SubscriptionState ALTER COLUMN host DROP DEFAULT;`
			`ALTER TABLE SubscriptionState DROP CONSTRAINT subscriptionstate_service_key;`
			`ALTER TABLE SubscriptionState ADD CONSTRAINT service_host_unique UNIQUE(service, host);`