[Solved] Given this mapping and document, what will be the stored value for the created_at field?{"mappings": {"properties": {"created_at": {"type": "date", "format": "yyyy/MM/dd HH:mm"}}}}{"created_at":... | Elasticsearch

Elasticsearch - Mappings and Data Types

Given this mapping and document, what will be the stored value for the created_at field?

{"mappings": {"properties": {"created_at": {"type": "date", "format": "yyyy/MM/dd HH:mm"}}}}
{"created_at": "2023/07/15 14:30"}

A2023-07-15T14:30:00.000Z

B2023/07/15 14:30

C15-07-2023 14:30

DEpoch milliseconds value

Step-by-Step Solution

Solution:

Step 1: Understand date parsing with custom format
The mapping defines the format as "yyyy/MM/dd HH:mm". The input matches this format exactly.
Step 2: Elasticsearch stores dates internally in ISO 8601 UTC format
So the stored value will be converted to ISO 8601 format with time zone Z (UTC).
Final Answer:
2023-07-15T14:30:00.000Z -> Option A
Quick Check:
Date stored in ISO 8601 UTC format [OK]

Quick Trick: Elasticsearch stores dates internally as ISO 8601 UTC [OK]

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Given this mapping and document, what will be the stored value for the created_at field?