Search for a keyword in all fields of an index according to given conditions

Elastic Stack Elasticsearch
1

I have a file containing keywords which I need to search for in the index. It is a csv file containing 3 headers - keyword,brandName,bucketName

What I need to do is search for the keyword in all fields of the index if brandName and bucketName values are '*', and if they are something else then I need to search the keyword in the fields whose value matches the bucketName and brandName. My index contains many fields including brandName and bucketName.
Please advise as to which search query I should use. I am not able to use multimatch query since number of fields for a document is not fixed.

2

Not sure I fully get it.

Could you provide a full recreation script as described in About the Elasticsearch category. It will help to better understand what you are doing. Please, try to keep the example as simple as possible.

A full reproduction script will help readers to understand, reproduce and if needed fix your problem. It will also most likely help to get a faster answer.

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