Trait ArrowStructBuilder

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pub trait ArrowStructBuilder: Send {
    // Required method
    fn append_null(&mut self);

    // Provided methods
    fn append_str(&mut self, name: &'static str, value: &str) { ... }
    fn append_i64(&mut self, name: &'static str, value: i64) { ... }
    fn append_u64(&mut self, name: &'static str, value: u64) { ... }
    fn append_f64(&mut self, name: &'static str, value: f64) { ... }
    fn append_bool(&mut self, name: &'static str, value: bool) { ... }
    fn append_bytes(&mut self, name: &'static str, value: &[u8]) { ... }
    fn append_field_null(&mut self, name: &'static str) { ... }
}

Expand description

Codegen-emitted Arrow StructArray row builder. The default EventSchemaErased::decode_to_arrow_struct implementation walks the buffa wire format and calls the matching append_* method per declared field, in declaration order from the schema’s FIELDS table. Sinks (obs-parquet, obs-clickhouse) implement this trait over their builder types; Phase 4A codegen may override decode_to_arrow_struct for per-event projections. Spec 14 § 2 / spec 94 § 2.5.

Required Methods§

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fn append_null(&mut self)

Append a null in this row across every field of this struct.

Provided Methods§

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fn append_str(&mut self, name: &'static str, value: &str)

Append a string value for the named field in this row. Default no-op so sinks that haven’t wired this column can still satisfy the trait without breaking the build.

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