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docs: if you add_column, then you have to backfill instead of refresh #201

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dantasse merged 1 commit into from
Apr 3, 2026
Merged

docs: if you add_column, then you have to backfill instead of refresh #201

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4 changes: 2 additions & 2 deletions docs/geneva/udfs/scalar-udtfs.mdx
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Original file line number Diff line number Diff line change
Expand Up @@ -140,7 +140,7 @@ def clip_embedding(clip_bytes: bytes) -> list[float]:
clips.add_columns({"embedding": clip_embedding})

# Backfill computes embeddings for all existing clips
clips.refresh()
clips.backfill("embedding")
```

This is a powerful pattern: expand source rows with a scalar UDTF, then enrich the expanded rows with standard UDFs.
Expand Down Expand Up @@ -217,7 +217,7 @@ def embed_text(chunk_text: str) -> list[float]:
return embedding_model.encode(chunk_text)

chunks.add_columns({"embedding": embed_text})
chunks.refresh() # Backfills embeddings on all existing chunks
chunks.backfill("embedding") # Backfills embeddings on all existing chunks

# Query — parent columns available alongside chunk columns
chunks.search(None).select(["doc_id", "title", "chunk_text", "embedding"]).to_pandas()
Expand Down
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