How to write wildcard search query in couchdb where name like 'a%'

问题

How can I write wildcard search in couchdb? I want to write query same as 'LIKE %' in sql.please help me for this.

 {
"name":"arun",
"surname":"mr"
}

 {
"name":"balu",
"surname":"tp"
}

I need to list all names that start with 'a'.

Thanks..

回答1:

In couchdb you can query over string ranges.

First you need to have a view that emits all the names as keys

function(doc){
  if(doc.name)
  emit(doc.name,null);
}

Then you can query it with

http://localhost:5984/your-db-name/_design/your-ddoc-name/_view/your-view-name?startkey="a"&endkey="a\ufff0" which will give you all the names starting with a.

'\uff0' is just a high value unicode character, not a specific character that will perform magic tricks in couchdb.

来源：https://stackoverflow.com/questions/24909317/how-to-write-wildcard-search-query-in-couchdb-where-name-like-a