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Update from code changes: document blob URI writes - #338

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Update from code changes: document blob URI writes#338
mintlify[bot] wants to merge 1 commit into
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mintlify/ae9ce5c9

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@mintlify mintlify Bot commented Aug 25, 2026

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Summary

Documents writing blob columns by URI reference: string values passed to add() now coerce to the blob's uri field, storing a reference instead of copying bytes.

Changes

  • Added a "Write blob URIs" section to the multimodal data page covering blob column declaration with lancedb.blob(), URI coercion in add(), registered blob base behavior, and the allow_external_blob_outside_bases escape hatch (local tables only; Enterprise tables reject it).
  • Added a tested Python snippet showing a URI write round trip with fetch_blobs().
  • Noted that merge_insert does not coerce string blob input.

Context

LanceDB add() previously rejected string values for blob columns. They now coerce to the blob uri child, with allow_external_blob_outside_bases as a local escape hatch for URIs outside registered blob bases.

lancedb/lancedb#3954

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mintlify Bot commented Aug 25, 2026

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lancedb-bcbb4faf 🟢 Ready View Preview Aug 25, 2026, 3:09 PM

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