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feat: enable native Iceberg reader by default#3819

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andygrove wants to merge 1 commit intoapache:mainfrom
andygrove:enable-iceberg-native-default
Open

feat: enable native Iceberg reader by default#3819
andygrove wants to merge 1 commit intoapache:mainfrom
andygrove:enable-iceberg-native-default

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Which issue does this PR close?

Closes #.

Rationale for this change

The native Iceberg reader has matured enough to be enabled by default, removing the need for users to explicitly opt in via configuration.

What changes are included in this PR?

  • Change default value of spark.comet.scan.icebergNative.enabled from false to true
  • Update user-guide Iceberg documentation to reflect the new default and remove the config from shell examples
  • Update benchmark README to note the feature is enabled by default

How are these changes tested?

Existing Iceberg test suites cover the native reader. This change only flips the default; no new behavior is introduced.

Change the default value of spark.comet.scan.icebergNative.enabled
from false to true, and update documentation to reflect this change.
@andygrove andygrove marked this pull request as ready for review March 27, 2026 21:37
@andygrove andygrove requested a review from mbutrovich March 27, 2026 21:37
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