Add migration for counter_cache table update
This commit is contained in:
Roman Chvanikov
parent
769d95644d
commit
0c2b09a9ba
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defmodule Pleroma.Repo.Migrations.UpdateCounterCacheTable do
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use Ecto.Migration
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@function_name "update_status_visibility_counter_cache"
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@trigger_name "status_visibility_counter_cache_trigger"
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def up do
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execute("drop trigger if exists #{@trigger_name} on activities")
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execute("drop function if exists #{@function_name}()")
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drop_if_exists(unique_index(:counter_cache, [:name]))
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drop_if_exists(table(:counter_cache))
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create_if_not_exists table(:counter_cache) do
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add(:instance, :string, null: false)
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add(:direct, :bigint, null: false, default: 0)
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add(:private, :bigint, null: false, default: 0)
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add(:unlisted, :bigint, null: false, default: 0)
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add(:public, :bigint, null: false, default: 0)
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end
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create_if_not_exists(unique_index(:counter_cache, [:instance]))
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"""
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CREATE OR REPLACE FUNCTION #{@function_name}()
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RETURNS TRIGGER AS
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$$
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DECLARE
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token_id smallint;
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hostname character varying(255);
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visibility_new character varying(64);
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visibility_old character varying(64);
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actor character varying(255);
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BEGIN
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SELECT "tokid" INTO "token_id" FROM ts_token_type('default') WHERE "alias" = 'host';
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IF TG_OP = 'DELETE' THEN
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actor := OLD.actor;
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ELSE
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actor := NEW.actor;
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END IF;
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SELECT "token" INTO "hostname" FROM ts_parse('default', actor) WHERE "tokid" = token_id;
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IF hostname IS NULL THEN
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hostname := split_part(actor, '/', 3);
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END IF;
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IF TG_OP = 'INSERT' THEN
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visibility_new := activity_visibility(NEW.actor, NEW.recipients, NEW.data);
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IF NEW.data->>'type' = 'Create' THEN
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EXECUTE format('INSERT INTO "counter_cache" ("instance", %1$I) VALUES ($1, 1)
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ON CONFLICT ("instance") DO
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UPDATE SET %1$I = "counter_cache".%1$I + 1', visibility_new)
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USING hostname;
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END IF;
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RETURN NEW;
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ELSIF TG_OP = 'UPDATE' THEN
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visibility_new := activity_visibility(NEW.actor, NEW.recipients, NEW.data);
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visibility_old := activity_visibility(OLD.actor, OLD.recipients, OLD.data);
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IF (NEW.data->>'type' = 'Create') and (OLD.data->>'type' = 'Create') and visibility_new != visibility_old THEN
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EXECUTE format('UPDATE "counter_cache" SET
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%1$I = greatest("counter_cache".%1$I - 1, 0),
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%2$I = "counter_cache".%2$I + 1
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WHERE "instance" = $1', visibility_old, visibility_new)
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USING hostname;
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END IF;
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RETURN NEW;
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ELSIF TG_OP = 'DELETE' THEN
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IF OLD.data->>'type' = 'Create' THEN
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visibility_old := activity_visibility(OLD.actor, OLD.recipients, OLD.data);
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EXECUTE format('UPDATE "counter_cache" SET
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%1$I = greatest("counter_cache".%1$I - 1, 0)
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WHERE "instance" = $1', visibility_old)
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USING hostname;
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END IF;
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RETURN OLD;
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END IF;
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END;
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$$
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LANGUAGE 'plpgsql';
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"""
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|> execute()
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execute("DROP TRIGGER IF EXISTS #{@trigger_name} ON activities")
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"""
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CREATE TRIGGER #{@trigger_name}
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BEFORE
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INSERT
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OR UPDATE of recipients, data
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OR DELETE
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ON activities
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FOR EACH ROW
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EXECUTE PROCEDURE #{@function_name}();
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"""
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|> execute()
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end
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def down do
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execute("DROP TRIGGER IF EXISTS #{@trigger_name} ON activities")
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execute("DROP FUNCTION IF EXISTS #{@function_name}()")
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drop_if_exists(unique_index(:counter_cache, [:instance]))
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drop_if_exists(table(:counter_cache))
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create_if_not_exists table(:counter_cache) do
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add(:name, :string, null: false)
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add(:count, :bigint, null: false, default: 0)
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end
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create_if_not_exists(unique_index(:counter_cache, [:name]))
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"""
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CREATE OR REPLACE FUNCTION #{@function_name}()
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RETURNS TRIGGER AS
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$$
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DECLARE
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BEGIN
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IF TG_OP = 'INSERT' THEN
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IF NEW.data->>'type' = 'Create' THEN
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EXECUTE 'INSERT INTO counter_cache (name, count) VALUES (''status_visibility_' || activity_visibility(NEW.actor, NEW.recipients, NEW.data) || ''', 1) ON CONFLICT (name) DO UPDATE SET count = counter_cache.count + 1';
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END IF;
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RETURN NEW;
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ELSIF TG_OP = 'UPDATE' THEN
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IF (NEW.data->>'type' = 'Create') and (OLD.data->>'type' = 'Create') and activity_visibility(NEW.actor, NEW.recipients, NEW.data) != activity_visibility(OLD.actor, OLD.recipients, OLD.data) THEN
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EXECUTE 'INSERT INTO counter_cache (name, count) VALUES (''status_visibility_' || activity_visibility(NEW.actor, NEW.recipients, NEW.data) || ''', 1) ON CONFLICT (name) DO UPDATE SET count = counter_cache.count + 1';
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EXECUTE 'update counter_cache SET count = counter_cache.count - 1 where count > 0 and name = ''status_visibility_' || activity_visibility(OLD.actor, OLD.recipients, OLD.data) || ''';';
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END IF;
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RETURN NEW;
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ELSIF TG_OP = 'DELETE' THEN
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IF OLD.data->>'type' = 'Create' THEN
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EXECUTE 'update counter_cache SET count = counter_cache.count - 1 where count > 0 and name = ''status_visibility_' || activity_visibility(OLD.actor, OLD.recipients, OLD.data) || ''';';
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END IF;
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RETURN OLD;
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END IF;
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END;
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$$
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LANGUAGE 'plpgsql';
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"""
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|> execute()
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"""
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CREATE TRIGGER #{@trigger_name} BEFORE INSERT OR UPDATE of recipients, data OR DELETE ON activities
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FOR EACH ROW
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EXECUTE PROCEDURE #{@function_name}();
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"""
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|> execute()
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end
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end
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