71 lines
2.6 KiB
PL/PgSQL
71 lines
2.6 KiB
PL/PgSQL
-- This extension gives us `uuid_generate_v1mc()` which generates UUIDs that cluster better than `gen_random_uuid()`
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-- while still being difficult to predict and enumerate.
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-- Also, while unlikely, `gen_random_uuid()` can in theory produce collisions which can trigger spurious errors on
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-- insertion, whereas it's much less likely with `uuid_generate_v1mc()`.
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create extension if not exists "uuid-ossp";
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-- Set up trigger to auto-set `updated_at` columns when rows are modified
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create or replace function set_updated_at()
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returns trigger as
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$$
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begin
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NEW.updated_at = now();
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return NEW;
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end;
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$$ language plpgsql;
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create or replace function trigger_updated_at(tablename regclass)
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returns void as
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$$
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begin
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execute format('CREATE TRIGGER set_updated_at
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BEFORE UPDATE
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ON %s
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FOR EACH ROW
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EXECUTE FUNCTION set_updated_at();', tablename);
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end;
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$$ language plpgsql;
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-- This is a text collation that sorts text case-insensitively, useful for `UNIQUE` indexes
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-- over things like usernames and emails, ithout needing to remember to do case-conversion.
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create collation case_insensitive (provider = icu, locale = 'und-u-ks-level2', deterministic = false);
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create type feed_type as enum ('atom', 'json', 'rss0', 'rss1', 'rss2', 'unknown');
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create table if not exists "feed" (
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feed_id uuid primary key default uuid_generate_v1mc(),
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title text,
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url varchar(2048) not null,
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type feed_type not null default 'unknown',
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description text default null,
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crawl_interval_minutes int not null default 180,
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last_crawl_error text default null,
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etag_header text default null,
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last_modified_header text default null,
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last_crawled_at timestamptz default null,
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last_entry_published_at timestamptz default null,
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created_at timestamptz not null default now(),
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updated_at timestamptz,
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deleted_at timestamptz
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);
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create index on "feed" (deleted_at);
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create unique index on "feed" (url);
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select trigger_updated_at('"feed"');
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create table if not exists "entry" (
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entry_id uuid primary key default uuid_generate_v1mc(),
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title text,
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url varchar(2048) not null,
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description text,
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feed_id uuid not null references "feed" (feed_id) on delete cascade,
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etag_header text default null,
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last_modified_header text default null,
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published_at timestamptz not null,
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created_at timestamptz not null default now(),
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updated_at timestamptz,
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deleted_at timestamptz
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);
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create index on "entry" (published_at desc) where deleted_at is null;
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create unique index on "entry" (url, feed_id);
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select trigger_updated_at('"entry"');
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