org.apache.drill.exec.store.base.filter

Class FilterPushDownStrategy

java.lang.Object

org.apache.drill.exec.store.base.filter.FilterPushDownStrategy

public class FilterPushDownStrategy
extends Object

Generalized filter push-down strategy which performs all the tree-walking and tree restructuring work, allowing a "listener" to do the work needed for a particular scan.

General usage in a storage plugin:

 public Set getPhysicalOptimizerRules(
        OptimizerRulesContext optimizerRulesContext) {
   return FilterPushDownStrategy.rulesFor(optimizerRulesContext,
      new MyPushDownListener(...));
 }
 

Constructor Summary

Constructors

Constructor and Description
FilterPushDownStrategy(FilterPushDownListener listener)

Method Summary

Modifier and Type	Method and Description
void	onMatch(org.apache.calcite.plan.RelOptRuleCall call, DrillFilterRel filter, DrillProjectRel project, DrillScanRel scan)
Set<StoragePluginOptimizerRule>	rules()
static Set<StoragePluginOptimizerRule>	rulesFor(FilterPushDownListener listener)

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

FilterPushDownStrategy

public FilterPushDownStrategy(FilterPushDownListener listener)

Method Detail

rules

public Set<StoragePluginOptimizerRule> rules()

rulesFor

public static Set<StoragePluginOptimizerRule> rulesFor(FilterPushDownListener listener)

onMatch

public void onMatch(org.apache.calcite.plan.RelOptRuleCall call,
                    DrillFilterRel filter,
                    DrillProjectRel project,
                    DrillScanRel scan)