schemas/vegbien.sql: _taxonlabel_set_parent_id(): just use a plain UPDATE statement, to avoid the significant parsing and stringification overhead of EXECUTE and quote_nullable(). it is not clear that EXECUTE is actually necessary to avoid caching the query plan, because the cache should be invalidated automatically when the table's ANALYZE statistics are regenerated.
schemas/vegbien.sql: _taxonlabel_set_parent_id(): just use a plain UPDATE statement, to avoid the significant parsing and stringification overhead of EXECUTE and quote_nullable(). it is not clear that EXECUTE is actually necessary to avoid caching the query plan, because the cache should be invalidated automatically when the table's ANALYZE statistics are regenerated.