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22 lines
955 B
Markdown
22 lines
955 B
Markdown
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# Errors and Result Serialization
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## Error taxonomy (`omnigraph::error::OmniError`)
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- `Compiler(...)` — schema/query parse/typecheck errors
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- `Lance(String)` — storage layer
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- `DataFusion(String)` — execution layer
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- `Io(io::Error)`
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- `Manifest(ManifestError { kind: BadRequest|NotFound|Conflict|Internal, … })`
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- `MergeConflicts(Vec<MergeConflict>)`
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Compiler-side `NanoError` covers parse / catalog / type / plan / execution / arrow / lance / IO / manifest / unique-constraint, each with structured spans (`SourceSpan { start, end }`) for ariadne-style diagnostics.
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## Result serialization (`omnigraph_compiler::result::QueryResult`)
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- `to_arrow_ipc()` — efficient binary
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- `to_sdk_json()` — JS-safe JSON (large i64 wrapped in metadata)
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- `to_rust_json()` — Rust-friendly JSON
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- `batches()` — direct Arrow `RecordBatch` access
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Mutation results: `{ affectedNodes: usize, affectedEdges: usize }` (also exposed as a tiny Arrow batch).
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