Discriminated label storage for IntervalKeyColumn. 'string'
labels go into a StringColumn (typically dict-encoded);
'number' labels go into a Float64Column. The discriminator
lets row-API consumers materialize labels with the correct type
(preserving string | numberIntervalValue semantics) without
an instanceof check.
Discriminated label storage for
IntervalKeyColumn.'string'labels go into aStringColumn(typically dict-encoded);'number'labels go into aFloat64Column. The discriminator lets row-API consumers materialize labels with the correct type (preservingstring | numberIntervalValuesemantics) without an instanceof check.