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BlobDescriptorArrayBuilder

lance::blob

Struct BlobDescriptorArrayBuilder 

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pub struct BlobDescriptorArrayBuilder { /* private fields */ }
Expand description

Builds physical blob descriptors for one blob v2 column.

This builder only produces the writer-side descriptor struct array. It does not allocate blob ids, choose sidecar paths, write blob objects, or commit data files.

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impl BlobDescriptorArrayBuilder

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pub fn new(column: impl Into<String>) -> Self

Create a descriptor array builder for one blob column.

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pub fn push_packed(&mut self, blob_id: u32, range: BlobRange) -> Result<()>

Append one packed blob descriptor.

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pub fn extend_packed( &mut self, blob_id: u32, ranges: impl IntoIterator<Item = BlobRange>, ) -> Result<()>

Append multiple packed blob descriptors for the same blob object.

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pub fn push_dedicated(&mut self, blob_id: u32, size: u64) -> Result<()>

Append one dedicated blob descriptor.

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pub fn push(&mut self, value: BlobDescriptor) -> Result<()>

Append one blob descriptor to this column.

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pub fn extend( &mut self, values: impl IntoIterator<Item = BlobDescriptor>, ) -> Result<()>

Append multiple blob descriptors to this column.

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pub fn push_inline(&mut self, data: impl Into<Bytes>) -> Result<()>

Append an inline blob value.

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pub fn push_external( &mut self, uri: impl Into<String>, range: Option<BlobRange>, ) -> Result<()>

Append an external blob reference.

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pub fn push_null(&mut self) -> Result<()>

Append a null blob row.

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pub fn field(&self) -> &Field

Return the descriptor Arrow field for this blob column.

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pub fn finish(self) -> Result<BlobDescriptorColumn>

Finish this column and return the writer-side descriptor struct array.

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