feat(proto): add Nested type support #1121
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Add ColNested helper type for working with ClickHouse Nested columns. Nested types are stored as multiple parallel Array columns with dot notation (e.g., `col.field`), and this implementation provides: - ColNested type with InputColumns/ResultColumns helpers for INSERT/SELECT - NewNested constructor for manual column setup - Infer method for automatic type inference from type strings - ParseNestedFields parser for complex nested type definitions - Integration with ColAuto for automatic column creation - ColumnTypeNested constant The implementation handles nested types at the application level since ClickHouse transmits them as separate Array columns over the wire. Includes comprehensive tests and benchmarks comparing native Nested encoding performance vs JSON string alternatives (~40x faster).
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Add ColNested helper type for working with ClickHouse Nested columns. Nested types are stored as multiple parallel Array columns with dot notation (e.g.,
col.field), and this implementation provides:The implementation handles nested types at the application level since ClickHouse transmits them as separate Array columns over the wire.
Includes comprehensive tests and benchmarks comparing native Nested encoding performance vs JSON string alternatives (~40x faster).
Summary
Add support for Nested columns #381 #1103
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