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[iceberg] Support custom table properties passthrough to Iceberg REST catalog - #9268

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[iceberg] Support custom table properties passthrough to Iceberg REST catalog#9268
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@JTaky JTaky commented Aug 17, 2026

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Adds an explicit opt-in prefix, metadata.iceberg.table-properties., mirroring the existing metadata.iceberg.rest.* pattern. Custom properties are merged into the Iceberg table's properties on create, recreate (on metadata-base mismatch), and steady-state update paths, all of which route through IcebergRestMetadataCommitter#updateProperties(). Iceberg's reserved property keys are filtered out to avoid crashing the commit.

ADPS-1261

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Tests

… catalog

Adds an explicit opt-in prefix, metadata.iceberg.table-properties.<key>,
mirroring the existing metadata.iceberg.rest.* pattern. Custom properties
are merged into the Iceberg table's properties on create, recreate (on
metadata-base mismatch), and steady-state update paths, all of which
route through IcebergRestMetadataCommitter#updateProperties(). Iceberg's
reserved property keys are filtered out to avoid crashing the commit.

ADPS-1261
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