Use runtime fieldsedit
Use the runtime_mappings parameter to extract and create runtime
fields, or columns, from existing ones during a search.
The following search creates a release_day_of_week runtime field from
release_date and returns it in the response.
response = client.sql.query(
format: 'txt',
body: {
runtime_mappings: {
release_day_of_week: {
type: 'keyword',
script: "\n emit(doc['release_date'].value.dayOfWeekEnum.toString())\n "
}
},
query: "\n SELECT * FROM library WHERE page_count > 300 AND author = 'Frank Herbert'\n "
}
)
puts response
POST _sql?format=txt
{
"runtime_mappings": {
"release_day_of_week": {
"type": "keyword",
"script": """
emit(doc['release_date'].value.dayOfWeekEnum.toString())
"""
}
},
"query": """
SELECT * FROM library WHERE page_count > 300 AND author = 'Frank Herbert'
"""
}
The API returns:
author | name | page_count | release_date |release_day_of_week ---------------+---------------+---------------+------------------------+------------------- Frank Herbert |Dune |604 |1965-06-01T00:00:00.000Z|TUESDAY