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Compute list/map cardinality from offsets for nested lists #25085

Description

@neilconway

Is your feature request related to a problem or challenge?

#25078 describes this optimization for the simple cast of non-nested lists. For nested lists, it would still be possible but the offset math would be more complex.

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Activity

  1. changed the title [-]Compute list/map cardinality from offsets for nested lists[/-] [+]Compute list/map `cardinality` from offsets for nested lists[/+] on Sep 8, 2026
  2. ArturoAHR commented on Sep 20, 2026

    @ArturoAHR

    take

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