feat: DH-23045: Add pre-filter Iceberg pruning Expression - #8442
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robbcamera wants to merge 6 commits into
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feat: DH-23045: Add pre-filter Iceberg pruning Expression#8442robbcamera wants to merge 6 commits into
robbcamera wants to merge 6 commits into
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Adds
pruningExpression()toIcebergReadInstructions: a raw Iceberg Expression applied during data-file discovery to skip manifests and data files that cannot contain matching rows. It prunes rather than filters; the result is a superset of the matching rows — application of a Deephaven filter can be applied to the pruned data.Manifests whose write-time schema cannot bind the expression are read in full rather than failing. Defaults to
alwaysTrue(), so existing reads are unchanged.