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What will happen if you use search_after without specifying a sort clause in your Elasticsearch query?

medium📝 Predict Output Q5 of Q15
Elasticsearch - Advanced Patterns
What will happen if you use search_after without specifying a sort clause in your Elasticsearch query?
AThe query will sort by document ID automatically
BThe query will paginate normally using default sorting
CThe query will ignore search_after and return first page
DThe query will return an error
Step-by-Step Solution
Solution:

  1. Step 1: Recall the requirement of sort with search_after

    search_after requires a sort clause to know the order of documents.

  2. Step 2: Understand the behavior without sort

    Without sort, Elasticsearch cannot apply search_after and will return an error.

  3. Final Answer:

    The query will return an error -> Option D

  4. Quick Check:

    search_after without sort = error [OK]
Quick Trick: Always include sort when using search_after to avoid errors [OK]
Common Mistakes:
MISTAKES
  • Assuming default sort is applied automatically
  • Expecting search_after to work without sort

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