Module binder 

Semantic validation - catching errors before execution.

The binder walks the logical plan and validates that everything makes sense:

• Is that variable actually defined? (You can’t use RETURN x if x wasn’t matched)
• Does that property access make sense? (Accessing .age on an integer fails)
• Are types compatible? (Can’t compare a string to an integer)

Better to catch these errors early than waste time executing a broken query.

Structs

Binder

Semantic binder for query plans.

BindingContext

Context containing all bound variables and their information.

VariableInfo

Information about a bound variable.