Collation prototype: field annotation, schema round-trip, comparator#16974
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laskoviymishka wants to merge 1 commit into
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Collation prototype: field annotation, schema round-trip, comparator#16974laskoviymishka wants to merge 1 commit into
laskoviymishka wants to merge 1 commit into
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Proof of concept for collation support in Java, mirroring the iceberg-go prototype and the spec change in apache#16972. - Types.NestedField carries an optional collation (String). StringType is a stateless singleton, so the collation lives on the field, not the type; it is only valid on string fields and is threaded through the builder, the asOptional/asRequired/withFieldId copies, and equals/hashCode/toString. - SchemaParser (de)serializes the field's "collation" attribute. - Comparators.charSequences(collation) returns a locale-aware comparator backed by java.text.Collator; a null or "utf8" collation yields the default UTF-8 byte-order comparator. A full implementation would use ICU for the complete modifier set, matching the spec's collation provider. Out of scope for this POC (documented in the spec change): collation-aware bounds in data_file (collation_bounds) and metrics-evaluator pruning.
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Proof of concept for collation support in Java, mirroring the iceberg-go prototype and the spec change in #16972.
Out of scope for this POC (documented in the spec change): collation-aware bounds in data_file (collation_bounds) and metrics-evaluator pruning.