org.apache.spark.sql.execution.sources
PhysicalScan
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package sources
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
- canEvaluate(EqualTo(a,c), R) returns false
- canEvaluate(Literal(1), R) returns true as literals CAN be evaluated on any plan
Returns true iff expr could be evaluated as a condition within join.
Returns true iff expr could be evaluated as a condition within join.
A pattern that matches any number of project or filter operations on top of another relational operator. All filter operators are collected and their conditions are broken up and returned together with the top project operator. Aliases are in-lined/substituted if necessary.