Companion

Positions of JSON scalars with every number exact: null, booleans, strings, and numbers of any width, a decimal or a big integer as it is, each read back as a BigDecimal. For a backend whose order compares a number by its exact value, so a position is the value its row held, not the nearest double.

Positions of JSON scalars: null, booleans, strings, integral numbers as longs and finite doubles.