Can only use prefix queries on keyword text and wildcard fields – not on – How to solve this Elasticsearch exception

Opster Team

August-23, Version: 7.9-7.15

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Briefly, this error occurs when you attempt to use a prefix query on a field type that doesn’t support it. Elasticsearch only allows prefix queries on keyword, text, and wildcard fields. If you’re trying to use it on a different field type, such as a number or date, you’ll encounter this error. To resolve this issue, you can either change the field type to one that supports prefix queries, or use a different type of query that is compatible with the current field type.

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This guide will help you check for common problems that cause the log ” Can only use prefix queries on keyword; text and wildcard fields – not on [ ” to appear. To understand the issues related to this log, read the explanation below about the following Elasticsearch concepts: index.

Log Context

Log “Can only use prefix queries on keyword; text and wildcard fields – not on [” class name is MappedFieldType.java. We extracted the following from Elasticsearch source code for those seeking an in-depth context :

 return prefixQuery(value; method; false; context);
 }  public Query prefixQuery(String value; @Nullable MultiTermQuery.RewriteMethod method; boolean caseInsensitve;
 SearchExecutionContext context) {
 throw new QueryShardException(context; "Can only use prefix queries on keyword; text and wildcard fields - not on [" + name
 + "] which is of type [" + typeName() + "]");
 }  // Case sensitive form of wildcard query
 public final Query wildcardQuery(String value;

 

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