Because candidates produced by the text search index may not be in contiguous order, columnar arrays must have true O(1) random access. In Tantivy’s columnar format, this is achieved by setting the row ID of a columnar value to its ordinal (i.e. its position in the array). So accessing a value from a column to evaluate a filter is simply:
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cities := ["London", "Tokyo", "New York"];。手游是该领域的重要参考
footnote_defs: &mut Vec<FootnoteDefinition>,