Elasticsearch document aliases - elasticsearch

Question

I have multiple mappings which come from the same datasource but have small differences, like the example below.
{
"type_A" : {
"properties" : {
"name" : {
"type" : "string"
}
"meta_A" : {
"type" : "string"
}
}
}
}
{
"type_B" : {
"properties" : {
"name" : {
"type" : "string"
}
"meta_B" : {
"type" : "string"
}
}
}
}
What I want to be able to is:
Directly query specific fields (like meta_A)
Directly query all documents from the datsource
Query all documents from a specific mapping
What I was looking into is the type filter, so preferably I could write a query like this:
{
"query": {
"filtered" : {
"filter" : {
"type" : { "value" : "unified_type" }
}
}
// other query clauses
}
}
So instead of typing "type_A","type_B" in an or clause in the type filter I would like to have this "unified_type", but without giving up the possibility to directly query "type_A".
How could I achive this?

Answer 1

I don't think that it's possible. However, you could use copy_to functionality, so you would have your fields as they are now and their values copied into unified name.
The copy_to parameter allows you to create custom _all fields. In
other words, the values of multiple fields can be copied into a group
field, which can then be queried as a single field. For instance, the
first_name and last_name fields can be copied to the full_name field
as follows:
So you'd be copying both "meta_A" and "meta_B" into some "unified_meta" field and query this one.