* [SDQL2] Adds selector arrays
* SDQL2 documentation spec updated slightly
* SDQL2 selector array docs + tweaks
If a single list is the only result of a MAP statement,
meaning objs.len == 1, AND it's a list, it will unwrap
the result from its containing list and return it directly.
The selector array logic keeps track of the state of the query
when it starts the first Search. It won't change the state back
to Execute until the top-level is reached, which sets a var
to keep track.
* SDQL2 MAP change from objs.len to length(objs)
* [SDQL2] Reverts MAP list unwrap
* [SDQL] Move (expr) from expr, unary_expr to var
This should result in the same functionality but instead of expressions and unary_expressions processing sub expressions, variables do
This means that expression->value->variable is now completely recursable
* [SDQL2] Update selector list documentation
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