Alan Woodward dd540ef618

Use index-prefix fields for terms of length min_chars - 1 (#36703) ...

The default index_prefix settings will index prefixes of between 2 and 5 characters in length. 
Currently, if a prefix search falls outside of this range at either end we fall back to a standard prefix 
expansion, which is still very expensive for single character prefixes. However, we have an option 
here to use a wildcard expansion rather than a prefix expansion, so that a query of a* gets remapped 
to a? against the _index_prefix field - likely to be a very small set of terms, and certain to be much
smaller than a* against the whole index.

This commit adds this extra level of mapping for any prefix term whose length is one less than
the min_chars parameter of the index_prefixes field.

2018-12-19 08:55:05 +00:00

..

licenses

Upgrade to lucene snapshot 774e9aefbc (#36637)

2018-12-14 20:30:07 +00:00

src

Use index-prefix fields for terms of length min_chars - 1 (#36703)

2018-12-19 08:55:05 +00:00

build.gradle

Converting randomized testing to create a separate unitTest task instead of replacing the builtin test task (#36311)

2018-12-19 08:25:20 +02:00