Learning Elasticsearch

Wildcard and Regular expression query

Wildcard query is used for wildcard matching on the search input. Just like phrase query, the query term is not analyzed. The following wildcards are supported:

Wildcard	Description
*	Matches any character
?	Matches single character

A sample query looks like the following:

 #Wildcard POST chapter6/product/_search {   "query": {     "wildcard" : {       "product_name" : "j*e?"     }   } }

Regex query is used to find the documents based on regular expression matching. Regular expression query can be very expensive depending on the prefix. A sample query looks like the following:

 #Regular Expression POST chapter6/product/_search {   "query": {     "regexp" : {       "product_name" : "jacke."     }   } }

The following are the commonly ...