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column_index_rows

mito2::sst::index::column

Function column_index_rows 

Source 
pub(crate) fn column_index_rows(
    batch: &RecordBatch,
    semantic_type: SemanticType,
) -> impl Iterator<Item = (usize, usize)> + '_
Expand description

Yields (first row, row count) for indexing a materialized column. Tags are constant within consecutive equal PK dictionary keys. Fields and timestamps must still be visited row by row. Distinct dictionary entries may contain equal PK bytes; keeping those runs separate is correct and avoids decoding. Inputs without a non-null PK dictionary fall back to visiting individual rows.