Every stored column of the given queries and their child rows (timestamps included), as one
canonical string, one line per row: two snapshots are equal only when no row was added,
removed or written. With childRowsOnly, the query rows themselves are left out.
Every stored column of the given queries and their child rows (timestamps included), as one canonical string, one line per row: two snapshots are equal only when no row was added, removed or written. With
childRowsOnly, the query rows themselves are left out.