Validate a Query against an index mapping

[YANG-DB]

Is your feature request related to a problem?
In recent adding of the Observability schema based indices and dashboards, we need the ability to validate that a given SQL / PPL query running against an index - that wasn’t created yet but has a mapping template, conforms to the index mapping that describes the structure.

What solution would you like?
Adding the API for validating the correctness of a query with an index mapping / mapping template
For that matter if an index template has a supporting json_schema corresponding for that mapping - that can be used as well...

What alternatives have you considered?
N/A

Do you have any additional context?

• [FEATURE] Fluent Bit OTEL Trace Format DOC observability#1396
• Support OTEL based Metrics Index Mapping in place observability#1389
• Support OTEL based Trace Index Mapping in place observability#1388

[dai-chen]

Currently there is no index mapping template concept in SQL engine. So the index has to exist and then explain API can serve as this purpose. Need to figure out if and how we want to support this.