Package org.apache.calcite.rel.rules

Interface PruneEmptyRules.ZeroMaxRowsRuleConfig

All Superinterfaces:

PruneEmptyRules.PruneEmptyRule.Config, RelRule.Config

Enclosing class:

PruneEmptyRules

@Immutable
public static interface PruneEmptyRules.ZeroMaxRowsRuleConfig
extends PruneEmptyRules.PruneEmptyRule.Config

Configuration for rule that transforms an empty relational expression into an empty values.

It relies on RelMdMaxRowCount to derive if the relation is empty or not. If the stats are not available then the rule is a noop.

Field Summary

Fields

Modifier and Type	Field	Description
static final PruneEmptyRules.ZeroMaxRowsRuleConfig	DEFAULT

Method Summary

Modifier and Type	Method	Description
default PruneEmptyRules.PruneEmptyRule	toRule()	Creates a rule that uses this configuration.

Methods inherited from interface org.apache.calcite.plan.RelRule.Config

as, description, operandSupplier, relBuilderFactory, withDescription, withOperandSupplier, withRelBuilderFactory

Field Details

DEFAULT

static final PruneEmptyRules.ZeroMaxRowsRuleConfig DEFAULT

Method Details

toRule

default PruneEmptyRules.PruneEmptyRule toRule()

Description copied from interface: RelRule.Config

Creates a rule that uses this configuration. Sub-class must override.

Specified by:

toRule in interface PruneEmptyRules.PruneEmptyRule.Config

Specified by:

toRule in interface RelRule.Config