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object PlanHelper

PlanHelper contains utility methods that can be used by Analyzer and Optimizer. It can also be container of methods that are common across multiple rules in Analyzer and Optimizer.

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  14. final def notifyAll(): Unit
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  15. def specialExpressionsInUnsupportedOperator(plan: LogicalPlan): Seq[Expression]

    Check if there's any expression in this query plan operator that is - A WindowExpression but the plan is not Window - An AggregateExpression but the plan is not Aggregate or Window - A Generator but the plan is not Generate Returns the list of invalid expressions that this operator hosts.

    Check if there's any expression in this query plan operator that is - A WindowExpression but the plan is not Window - An AggregateExpression but the plan is not Aggregate or Window - A Generator but the plan is not Generate Returns the list of invalid expressions that this operator hosts. This can happen when 1. The input query from users contain invalid expressions. Example : SELECT * FROM tab WHERE max(c1) > 0 2. Query rewrites inadvertently produce plans that are invalid.

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