[Solved] What will be the result of this query?{"query": {"exists": {"field": "address.city"}}}Assuming some documents have 'address' but no 'city' field inside it. | Elasticsearch

Elasticsearch - Basic Search Queries

What will be the result of this query?

{"query": {"exists": {"field": "address.city"}}}

Assuming some documents have 'address' but no 'city' field inside it.

AOnly documents with 'address.city' field present will be returned

BAll documents with 'address' field will be returned

CDocuments missing 'address.city' but having 'address' will be returned

DNo documents will be returned

Step-by-Step Solution

Solution:

Step 1: Understand nested field checking in exists query
The query checks specifically for the nested field 'address.city', not just 'address'.
Step 2: Analyze document matching
Only documents where 'address.city' exists will match; documents with 'address' but missing 'city' won't match.
Final Answer:
Only documents with 'address.city' field present will be returned -> Option A
Quick Check:
exists query matches exact nested field [OK]

Quick Trick: Exists query checks full field path, including nested fields [OK]

Common Mistakes:

MISTAKES

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