DynamicPruningSubquery Unevaluable Subquery Unary Expression¶

DynamicPruningSubquery is a SubqueryExpression and a DynamicPruning predicate expression.

DynamicPruningSubquery is an Unevaluable expression.

DynamicPruningSubquery is used in the following logical and physical optimizations:

• InjectRuntimeFilter logical optimization
• InsertAdaptiveSparkPlan physical optimization
• 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

Adaptive Query Planning¶

DynamicPruningSubquery is planned as DynamicPruningExpression (with InSubqueryExec child expression) in PlanAdaptiveSubqueries physical optimization.

Textual Representation¶

toString: String

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

dynamicpruning#[exprId] [conditionString]