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Posted to jira@arrow.apache.org by "Antoine Pitrou (Jira)" <ji...@apache.org> on 2020/09/28 17:28:00 UTC
[jira] [Updated] (ARROW-4753) [C++] Extension types and layouts for
text-optimized data structures
[ https://issues.apache.org/jira/browse/ARROW-4753?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Antoine Pitrou updated ARROW-4753:
----------------------------------
Fix Version/s: (was: 2.0.0)
3.0.0
> [C++] Extension types and layouts for text-optimized data structures
> --------------------------------------------------------------------
>
> Key: ARROW-4753
> URL: https://issues.apache.org/jira/browse/ARROW-4753
> Project: Apache Arrow
> Issue Type: Wish
> Components: C++, Format
> Environment: C/C++
> Reporter: Edmon Begoli
> Priority: Minor
> Labels: features
> Fix For: 3.0.0
>
>
> Narrative (text), by default, is notoriously inefficient to store on the disk or in memory. It is, in the most basic form, a long sequence of bytes with no indexing or other optimized layout structure.
>
> There are data structures such as [tries|https://en.wikipedia.org/wiki/Trie], [DAFSAs|https://en.wikipedia.org/wiki/Deterministic_acyclic_finite_state_automaton], or [b-tries|https://dl.acm.org/citation.cfm?id=1541552] that support more efficient storage and lookup of phrases.
>
> We would like to enable arrow to serialize from/to these efficient structures as the format/carrier between high performance text processing steps which like to operate on binary data structures (lookups, spellers, or more advance NLP routines).
>
> so, it could be something like:
>
> *{color:#707070}_text.to_arrow(infer=true|dafsa|trie|b-trie) : arrow_{color}* {color:#14892c}// writes arrow as format for the specified encoding. This could be implicit if we could store encoding in some kind of manifest{color}
>
> *{color:#707070}_arrow.to_text(infer=true|dafsa|trie|b-trie) : string_{color}* {color:#14892c}// restores text from the arrow format, and from a specified encoding, same as above. {color}
>
> {color:#333333}On the dev mailing list we are discussion creation of the contrib folder where such features could be optionally included for Arrow.{color}
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