Resolve and rewrite all subqueries in an operator tree.
Resolve and rewrite all subqueries in an operator tree..
Returns true if expr
can be evaluated using only the output of plan
.
Returns true if expr
can be evaluated using only the output of plan
. This method
can be used to determine when it is acceptable to move expression evaluation within a query
plan.
For example consider a join between two relations R(a, b) and S(c, d).
canEvaluate(EqualTo(a,b), R)
returns true
where as canEvaluate(EqualTo(a,c), R)
returns
false
.
Name for this rule, automatically inferred based on class name.
Name for this rule, automatically inferred based on class name.
This rule resolves and rewrites subqueries inside expressions.
Note: CTEs are handled in CTESubstitution.