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jt2594838
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| for (size_t i = 0; i < lower_case_column_names.size(); ++i) { | ||
| auto ind = table_schema->find_column_index(lower_case_column_names[i]); | ||
| if (ind < 0) { | ||
| delete time_filter; |
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Why is time_filter deleted here?
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I removed the delete there, since this layer should not own/free time_filter in that path.
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Double-check this, instead of removing the delete, more deletes are even added.
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| bool TsFileSeriesScanIterator::should_skip_chunk_by_time( | ||
| ChunkMeta* cm, int64_t min_time_hint) { | ||
| if (min_time_hint < 0 || cm->statistic_ == nullptr) { |
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Beware of negative timestamp
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I switched to INT64_MIN sentinel handling here as well, so negative timestamps are not treated as an invalid hint.
jt2594838
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Mar 25, 2026
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May also add in C and Python.
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Done |
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Summary
Add
queryByRow(paths/table, offset, limit)for both tree and table model. Results are equivalent to “full query then skip firstoffsetrows and take at mostlimitrows,” but offset/limit are pushed down so that Chunk/Page-level skipping avoids decoding unnecessary data where possible.Changes
Tree model
TsFileReader::queryByRow(path_list, offset, limit)/TsFileTreeReader::queryByRow(devices, measurements, offset, limit).set_row_range(offset, limit)on SSI → Chunk/Page skipped by count. Multi-path: offset/limit applied in merge loop;min_time_hintused to skip stale Chunks.Table model
TsFileReader::queryByRow(table_name, column_names, offset, limit).remaining_offset >= device_row_count(Dense (in this codebase) means: within one device, every queried column has the same number of rows and the same timestamps.).set_row_range(offset, limit)on each column’s SSI → Chunk/Page skip by count.Review focus