[jira] [Updated] (CASSANDRA-14247) SASI tokenizer for simple delimiter based entries

["mck (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/CASSANDRA-14247?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

mck updated CASSANDRA-14247:
----------------------------
      Labels: sasi  (was: )
    Reviewer: Michael Kjellman
      Status: Patch Available  (was: In Progress)

> SASI tokenizer for simple delimiter based entries
> -------------------------------------------------
>
>                 Key: CASSANDRA-14247
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-14247
>             Project: Cassandra
>          Issue Type: Improvement
>          Components: sasi
>            Reporter: mck
>            Assignee: mck
>            Priority: Major
>              Labels: sasi
>             Fix For: 4.0, 3.11.x
>
>
> Currently SASI offers only two tokenizer options:
>  - NonTokenizerAnalyser
>  - StandardAnalyzer
> The latter is built upon Snowball, powerful for human languages but overkill for simple tokenization.
> A simple tokenizer is proposed here. The need for this arose as a workaround of CASSANDRA-11182, and to avoid the disk usage explosion when having to resort to {{CONTAINS}}. See https://github.com/openzipkin/zipkin/issues/1861
> Example use of this would be:
> {code}
> CREATE CUSTOM INDEX span_annotation_query_idx 
>     ON zipkin2.span (annotation_query) USING 'org.apache.cassandra.index.sasi.SASIIndex' 
>     WITH OPTIONS = {
>         'analyzer_class': 'org.apache.cassandra.index.sasi.analyzer.DelimiterAnalyzer', 
>         'delimiter': '░',
>         'case_sensitive': 'true', 
>         'mode': 'prefix', 
>         'analyzed': 'true'};
> {code}
> Original credit for this work goes to https://github.com/zuochangan



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