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

An abstraction to incrementally add ((Key, Value), Time, i64) records in a columnar representation, and eventually get back a ColumnarRecords.

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impl ColumnarRecordsBuilder

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pub fn len(&self) -> usize

The number of (potentially duplicated) ((Key, Val), Time, i64) records stored in Self.

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pub fn reserve( &mut self, additional: usize, key_size_guess: usize, val_size_guess: usize )

Reserve space for additional more records, based on key_size_guess and val_size_guess.

The guesses for key and val sizes are best effort, and if they end up being too small, the underlying buffers will be resized.

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pub fn reserve_exact( &mut self, additional: usize, key_bytes: usize, val_bytes: usize )

Reserve space for additional more records, with exact sizes for the key and value data.

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pub fn can_fit(&self, key: &[u8], val: &[u8], limit: usize) -> bool

Returns if the given key_offsets+key_data or val_offsets+val_data fits in the limits imposed by ColumnarRecords.

Note that limit is always KEY_VAL_DATA_MAX_LEN in production. It’s only override-able here for testing.

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pub fn push(&mut self, record: ((&[u8], &[u8]), [u8; 8], [u8; 8])) -> bool

Add a record to Self.

Returns whether the record was successfully added. A record will not a added if it exceeds the size limitations of ColumnarBatch. This method is atomic, if it fails, no partial data will have been added.

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pub fn finish(self, metrics: &ColumnarMetrics) -> ColumnarRecords

Finalize constructing a ColumnarRecords.

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pub fn columnar_record_size( key_bytes_len: usize, value_bytes_len: usize ) -> usize

Size of an update record as stored in the columnar representation

Trait Implementations§

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impl Debug for ColumnarRecordsBuilder

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fn fmt(&self, fmt: &mut Formatter<'_>) -> Result

Formats the value using the given formatter. Read more
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impl Default for ColumnarRecordsBuilder

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fn default() -> Self

Returns the “default value” for a type. Read more

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impl<T> Any for T
where T: 'static + ?Sized,

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fn type_id(&self) -> TypeId

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impl<T> Borrow<T> for T
where T: ?Sized,

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fn borrow(&self) -> &T

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impl<T> BorrowMut<T> for T
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fn borrow_mut(&mut self) -> &mut T

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impl<T, U> CastInto<U> for T
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Performs the cast.
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fn with_context(self, otel_cx: Context) -> WithContext<Self>

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Creates a shared type from an unshared type.
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impl<T> Pointable for T

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const ALIGN: usize = _

The alignment of pointer.
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type Init = T

The type for initializers.
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unsafe fn init(init: <T as Pointable>::Init) -> usize

Initializes a with the given initializer. Read more
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Dereferences the given pointer. Read more
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fn push_into(self, target: &mut Vec<T>)

Push self into the target container.
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type Output = T

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type Error = <U as TryFrom<T>>::Error

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fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>

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