Walk a batch as a sequence of bounded ColumnarResult pages.
This is how a caller converts more of a batch than one window without raising
the ceiling: each page is a complete, independently valid Result bounded by
maxFeatures, and only the page a consumer is holding is live. A consumer
that streams a million-row batch to a file therefore retains one page, not a
million features.
Pages are emitted in ascending row order, contiguous and non-overlapping, so
concatenating every page's features reproduces exactly the feature sequence
a single window over the same range would have produced. An empty range
yields no pages at all rather than one empty page.
Cancellation is cooperative and real: options.signal is checked before each
page and every 1,024 rows inside a page, and the traversal yields to the host
task queue between pages so an abort raised by a task is actually delivered.
An aborted traversal rejects with an AbortErrorDOMException and stops
without materializing the remaining pages.
HonuaGeoArrowError invalid-input when pageSize is not a positive
safe integer, and row-limit-exceeded when pageSize exceeds maxFeatures.
Both are checked before the batch is inspected.
Example
forawait (constpageofcolumnarBatchToResultPages(batch, { pageSize:1_000, maxFeatures:1_000, signal })) { awaitwriteRows(page.features); }
Walk a batch as a sequence of bounded ColumnarResult pages.
This is how a caller converts more of a batch than one window without raising the ceiling: each page is a complete, independently valid
Resultbounded bymaxFeatures, and only the page a consumer is holding is live. A consumer that streams a million-row batch to a file therefore retains one page, not a million features.Pages are emitted in ascending row order, contiguous and non-overlapping, so concatenating every page's
featuresreproduces exactly the feature sequence a single window over the same range would have produced. An empty range yields no pages at all rather than one empty page.Cancellation is cooperative and real:
options.signalis checked before each page and every 1,024 rows inside a page, and the traversal yields to the host task queue between pages so an abort raised by a task is actually delivered. An aborted traversal rejects with anAbortErrorDOMExceptionand stops without materializing the remaining pages.