DynamicPruningSubquery Unevaluable Subquery Expression¶

DynamicPruningSubquery is a SubqueryExpression and a DynamicPruning predicate expression.

DynamicPruningSubquery is an unevaluable expression.

DynamicPruningSubquery is used by PlanDynamicPruningFilters physical optimization.

Creating Instance¶

DynamicPruningSubquery takes the following to be created:

• Pruning Key Expression
• Build Query LogicalPlan
• Build Keys Expressions
• Broadcast Key Index
• onlyInBroadcast Flag
• ExprId (default: NamedExpression.newExprId)

DynamicPruningSubquery is created when PartitionPruning logical optimization is executed.

Textual Representation¶

toString: String

toString uses the exprId and conditionString to build a textual representation:

dynamicpruning#[exprId] [conditionString]