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Change default value to true for transpositions parameter of fuzzy query #26901

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Oct 11, 2017
Merged

Change default value to true for transpositions parameter of fuzzy query #26901

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bf89e19
Change default value to true for transpositions parameter of fuzzy query
alexshadow007 Oct 5, 2017
4aa0d59
Add tests for transpositions parameter of fuzzy query
alexshadow007 Oct 7, 2017
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4 changes: 2 additions & 2 deletions core/src/main/java/org/elasticsearch/index/query/FuzzyQueryBuilder.java
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Expand Up @@ -54,8 +54,8 @@ public class FuzzyQueryBuilder extends AbstractQueryBuilder<FuzzyQueryBuilder> i
public static final int DEFAULT_MAX_EXPANSIONS = FuzzyQuery.defaultMaxExpansions;

/** Default as to whether transpositions should be treated as a primitive edit operation,
* instead of classic Levenshtein algorithm. Defaults to false. */
public static final boolean DEFAULT_TRANSPOSITIONS = false;
* instead of classic Levenshtein algorithm. Defaults to true. */
public static final boolean DEFAULT_TRANSPOSITIONS = FuzzyQuery.defaultTranspositions;

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Can you add a small test in FuzzyQueryBuilderTests that setting transpositions to true/false works ?
You can also remove the comment below:

//LUCENE 4 UPGRADE ...

private static final ParseField TERM_FIELD = new ParseField("term");
private static final ParseField VALUE_FIELD = new ParseField("value");
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6 changes: 5 additions & 1 deletion docs/reference/migration/migrate_7_0/search.asciidoc
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@@ -1,5 +1,9 @@
[[breaking_70_search_changes]]
=== Search changes
=== Search and Query DSL changes

==== Changes to queries
* The default value for `transpositions` parameter of `fuzzy` query
has been changed to `true`.

==== Adaptive replica selection enabled by default

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5 changes: 3 additions & 2 deletions docs/reference/query-dsl/fuzzy-query.asciidoc
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Expand Up @@ -36,7 +36,8 @@ GET /_search
"boost" : 1.0,
"fuzziness" : 2,
"prefix_length" : 0,
"max_expansions": 100
"max_expansions": 100,
"transpositions": false
}
}
}
Expand Down Expand Up @@ -66,7 +67,7 @@ GET /_search
`transpositions`::

Whether fuzzy transpositions (`ab` -> `ba`) are supported.
Default is `false`.
Default is `true`.

WARNING: This query can be very heavy if `prefix_length` is set to `0` and if
`max_expansions` is set to a high number. It could result in every term in the
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