timescaledb/extension/sql/meta/hypertable_triggers.sql

-- Trigger on the meta node for when a new hypertable is added.
CREATE OR REPLACE FUNCTION _meta.on_create_hypertable()
    RETURNS TRIGGER LANGUAGE PLPGSQL AS
$BODY$
BEGIN
    IF TG_OP = 'INSERT' THEN
        INSERT INTO hypertable_replica
        SELECT
            NEW.name,
            replica_id,
            NEW.associated_schema_name,
            format('%s_%s_replica', NEW.associated_table_prefix, replica_id),
            NEW.associated_schema_name,
            format('%s_%s_distinct', NEW.associated_table_prefix, replica_id)
        FROM generate_series(0, NEW.replication_factor - 1) AS replica_id
        ON CONFLICT DO NOTHING;

        PERFORM _meta.assign_default_replica_node(n.database_name, NEW.name)
        FROM node n;
        RETURN NEW;
    END IF;

    IF TG_OP = 'DELETE' THEN
        RETURN OLD;
    END IF;

    RAISE EXCEPTION 'Only inserts and deletes supported on hypertable name '
    USING ERRCODE = 'IO101';

    RETURN NEW;
END
$BODY$;