[SYSTEMDS-3779] Add ColGroupDDCLZW with LZW-compressed MapToData#2398

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florian-jobs wants to merge 19 commits intoapache:mainfrom

LukaDeka:ColGroupDDCLZW2

Commits on Jan 7, 2026

Second skeleton for ColGroupDDCLZW using the IMapToDataInterface and extending on APreAgg like ColGroupDDC for easier implementation. Idea: store only compressed version of _data vector and importa…
florian-jobs
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Commits on Jan 8, 2026

Idea:
florian-jobs
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Commits on Jan 9, 2026

More TODOS written and cleaned up project.
florian-jobs
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Commits on Jan 10, 2026

Dictionary initialisierung für Compress und rudimentäre Implementierung von Decompress
Annika Lehmann
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Uebersichtlichkeit verbessert
Annika Lehmann
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Commits on Jan 12, 2026

Commits on Jan 13, 2026

Commits on Jan 15, 2026

Decompression to a specific index
Annika Lehmann
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Commits on Jan 16, 2026

Commits on Jan 17, 2026

[SYSTEMDS-3779] Intermediate DDCLZW Scheme
Annika Lehmann
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