Appropriate index for query with unnest

SQL++
,
5

Successor give next order of value.

Within the data types, integer adds +1, float64 - The Go Programming Language
string next ascii string comes after.

SELECT SUCCESSOR(1), SUCCESSOR(1.1), SUCCESSOR("abc");
{
        "$1": 2,
        "$2": 1.1000000000000003,
        "$3": "abc "
    }

The following two links have some details why need successor. These are complex.

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