I wonder how do I filter documents in elastic search that doesn't have particular field or have this field with particular value.
example, I have a doc which may have the field "only2".
and I query for all the docs, that have this field equals to my username and the whole the docs that are not set to my username (meaning I set it to be public)
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I have a situation where I need to search from multiple indexes (products and users). Below is a sample query I am using to do that search
http://localhost:9200/_all/_search?q=*wood*
http://localhost:9200/users,products/_search?q=*wood*
With the above API request, it only returns search results for the product index. But if I search using the below API it returns search results for users index
http://localhost:9200/users/_search?q=*wood*
As you can see I am passing same value for "q" parameter. I need to search for both product and users index and check if there is the word "wood" in any attribute in both indexes. How can I achieve this
You can pass multiple index names instead of _all as it will search in other indices that you don't intent to by using the comma seprated index name like
http://localhost:9200/users,products/_search?q=*wood*
Although, _all should also fetch the result from users index which you get when you specify its name, you need to debug why its happening, maybe increase the size param to 1000 as by default Elasticsearch returns only 10 results and it seems in case of _all all the top results coming from products index only.
Im having problems getting a query to return the results i require. Im wanting to search for all documents which have a Field name called 'Title' but only them where the value is null.
By default Elasticsearch does not store fields with null value in its index, so you are not able to distinguish documents without Title field at all from documents where this field contains null. To cope with this issue you have explicitly choose some value that will indicate that field is empty. Look at this article for details.
I want to delete documents not having a specific field in elastic search. I tried combination of must_not and exists but its giving documents in which the field is there but its null.But i want the docs in which the field is not present at all.
I have an index in elastics search with products. Every product has an article number in the form of a guid. To show this products on a webshop I don't want to show a guid (to long). I want an integer number.
Now i have two keys. One to lookup the web request (the integer) and one to update the product (the guid)
I know I can search on a field in elastic search. But is an exact match search on a field slower as an exact match on a key (_id)? I don't want to do a mapping search from one key to the other because that is another operation.
The _id field is just a primary key for documents. It will be stored separately. Yes, there will be some lag. But you'll find it's not that much lag. If you want a field to search as fast as _id field. Then in mapping, store the field externally. Refer to the store attribute for a field.
Like other fields, it's also stored in ES. By default _id is not analyzed. If you define a field as not_analyzed its also as fast as the _id field. ES indexes each and every field the same.
In the documentation, some types, such as numbers and dates, it specifies that store defaults to no. But that the field can still be retrieved from the json.
Its confusing. Does this mean _source?
Is there a way to not store a field at all, and just have it indexed and searchable?
None of the field types are stored by default. Only the _source field is. That means you can always get back what you sent to the search engine. Even if you ask for specific fields, elasticsearch is going to parse the _source field for you and give you back those fields.
You can disable the _source if you want but then you could only retrieve the fields that you explicitly stored, according to your mapping.