Introduce `in` predicate to check against a set of values

[maydanw]

Problem to Solve

Concrete example:
Given a list of 1000s of document entities ids retrieved from a search in ES we want to check if a user has access to each of them and filter them.
The current options are either:

1. Running 1000s of independent queries
2. Build a query with 1000s of independent OR statements

Both are inefficient

Current Workaround

1. Running 1000s of independent queries
2. Build a query with 1000s of independent OR statements

Proposed Solution

Add "in" (or "isIn") construct to the syntax
For example (in python):

query = "match $d isa document, has objID in ["123", "1122", "333AAA", "6A5B"]; ..."

Additional Information

Beyond improving the ease of usage, I (@maydanw) believe this can be optimized due to:

• Server caching - from my understanding lots of the reasoner caching is only inside the tx,
• Same server snapshot
• It can have better server CPUs utilization
• Less network communication
• Validating the predicate value in the list can be hashed instead of searched for each.

[flyingsilverfin]

This might naturally be incldued in the future when we include vectors or sets of values natively in TypeDB?

related:
typedb/typedb#6327

[flyingsilverfin]

Related to typedb/typedb#5527