Boundary Flag

The boundary flag property of the range index determines how values that fall below the base value or above the range limit are handled.

The following values are recognized:

Value

Symbol

Description

0

DISCARD

Discard values that fall outside the numeric range.

1

LOWER_BOUND

Place values that fall below the numeric range base into the first slot.

2

UPPER_BOUND

Place values that fall above the numeric range limit into the last slot.

3

UPPER_LOWER_BOUND

Place values that fall below the numeric range base into the first slot and values that fall above the value range limit into the last slot.

4

FIRST_SLOT

Place values that fall outside the numeric range into the overflow slot.