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50aaa1c2a6
This creates a `pragma` you can use to request that fields load from a
stored field rather than doc values. It implements that pragma for
`keyword` and number fields.
We expect that, for some disk configuration and some number of fields,
that it's faster to load those fields from _source or stored fields than
it is to use doc values. Our default is doc values and on my laptop it's
*always* faster to use doc values. But we don't ship my laptop to every
cluster.
This will let us experiment and debug slow queries by trying to load
fields a different way.
You access this pragma with:
```
curl -HContent-Type:application/json -XPOST localhost:9200/_query?pretty -d '{
"query": "FROM foo",
"pragma": {
"field_extract_preference": "STORED"
}
}'
```
On a release build you'll need to add `"accept_pragma_risks": true`.
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| .. | ||
| aggregations | ||
| analysis-common | ||
| apm | ||
| data-streams | ||
| dot-prefix-validation | ||
| health-shards-availability | ||
| ingest-attachment | ||
| ingest-common | ||
| ingest-geoip | ||
| ingest-user-agent | ||
| kibana | ||
| lang-expression | ||
| lang-mustache | ||
| lang-painless | ||
| legacy-geo | ||
| mapper-extras | ||
| parent-join | ||
| percolator | ||
| rank-eval | ||
| reindex | ||
| repository-azure | ||
| repository-gcs | ||
| repository-s3 | ||
| repository-url | ||
| rest-root | ||
| runtime-fields-common | ||
| systemd | ||
| transport-netty4 | ||
| build.gradle | ||