[GitHub] [incubator-iceberg] rdblue opened a new pull request #338: Add mapping to Iceberg for external name-based schemas

[GitBox <gi...@apache.org>]

rdblue opened a new pull request #338: Add mapping to Iceberg for external name-based schemas
URL: https://github.com/apache/incubator-iceberg/pull/338
 
 
   This adds a mapping from external schema names to Iceberg type IDs. This will be used to add Iceberg IDs to data files written without those IDs, like Avro files.
   
   This mapping is a multi-level mapping that matches the structure of Iceberg schemas. Each nested type (struct, list, and map) has a nested mapping for its nested fields. Each field, including list element, map key, and map value, is represented using `MappedField` that contains a set of names and an optional Iceberg ID.
   
   `NamedMapping` provides high-level methods to find mapped fields by ID or by qualified name.
   
   Fixes #40.

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