feat: Add NameMapping
#1072
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feat: Add NameMapping
#1072
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…-n/iceberg-rust into implement-name-mapping
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Thanks @jonathanc-n for this pr, generally I think this is quite useful to complete features of NameMapping. Here are my suggestions:
- Split the pr into several smaller ones.
- Add
MappedFieldslike java does. - Add visitor for index by name and index by field id with enough tests
- Add visitor for update mappings with tests.
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| /// Returns an index mapping names to `MappedField`` by visiting the schema. | ||
| pub fn index_by_name(schema: &Schema) -> HashMap<String, MappedField> { |
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I don't think we should expose this method to user, the index should be constructed lazily.
| /// Iceberg fallback field name to ID mapping. | ||
| #[derive(Debug, Serialize, Deserialize, PartialEq, Eq, Clone)] | ||
| #[serde(transparent)] | ||
| pub struct NameMapping { | ||
| /// Holds mapped fields |
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Seems we lack a MappedFields field like java one
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| /// Applies the name mapping to the given schema. | ||
| pub fn apply_name_mapping(schema: &Schema, mapping: &NameMapping) -> Result<Type> { |
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I'm confusing about this method, is there any case to demonstrate its usage?
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Which issue does this PR close?
What changes are included in this PR?
Added
NameMappingimplementation. Includes updating, creating, and applying to other schema.Are these changes tested?