ESQL: Load from stored fields with _source and doc values disabled #138019
Description
Description
I'm writing some docs for how to implement the blockLoader method and it looks like if you configuration a numeric like this:
"mappings": {
"_source": { "enabled": false },
"field": {
"type": "long", <-- any numeric will do here
"stored": true,
"doc_values": false
}
}
Then ESQL will not be able to load the field. But we have data on disk for the field. We just haven't plugged it in. If we turn off doc_values but have synthetic _source enabled we'll use the ignored-source loader mechanism. But this way doesn't work.
We just have so so many ways to configure things. We should probably support this, but it's a quite uncommon way to configure a field.