Package org.apache.calcite.adapter.druid

Class DruidRules.DruidFilterRule

java.lang.Object

org.apache.calcite.plan.RelOptRule

org.apache.calcite.adapter.druid.DruidRules.DruidFilterRule

Enclosing class:

DruidRules

public static class DruidRules.DruidFilterRule
extends RelOptRule

Rule to push a Filter into a DruidQuery.

Field Summary

Fields inherited from class org.apache.calcite.plan.RelOptRule

description, operands, relBuilderFactory

Constructor Summary

Constructors

Constructor	Description
DruidFilterRule(RelBuilderFactory relBuilderFactory)	Creates a DruidFilterRule.

Method Summary

Modifier and Type	Method	Description
void	onMatch(RelOptRuleCall call)	Receives notification about a rule match.
private static org.apache.commons.lang3.tuple.Triple<java.util.List<RexNode>,java.util.List<RexNode>,java.util.List<RexNode>>	splitFilters(RexBuilder rexBuilder, DruidQuery input, java.util.List<RexNode> validPreds, java.util.List<RexNode> nonValidPreds, int timestampFieldIdx)	Given a list of conditions that contain Druid valid operations and a list that contains those that contain any non-supported operation, it outputs a triple with three different categories: 1-l) condition filters on the timestamp column, 2-m) condition filters that can be pushed to Druid, 3-r) condition filters that cannot be pushed to Druid.

Methods inherited from class org.apache.calcite.plan.RelOptRule

any, convert, convert, convertList, convertOperand, convertOperand, equals, equals, getOperand, getOperands, getOutConvention, getOutTrait, hashCode, matches, none, operand, operand, operand, operand, operand, operandJ, operandJ, some, toString, unordered

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Constructor Detail

DruidFilterRule

public DruidFilterRule(RelBuilderFactory relBuilderFactory)

Creates a DruidFilterRule.

Parameters:

relBuilderFactory - Builder for relational expressions

Method Detail

onMatch

public void onMatch(RelOptRuleCall call)

Description copied from class: RelOptRule

Receives notification about a rule match. At the time that this method is called, call.rels holds the set of relational expressions which match the operands to the rule; call.rels[0] is the root expression.

Typically a rule would check that the nodes are valid matches, creates a new expression, then calls back RelOptRuleCall.transformTo(org.apache.calcite.rel.RelNode, java.util.Map<org.apache.calcite.rel.RelNode, org.apache.calcite.rel.RelNode>) to register the expression.

Specified by:

onMatch in class RelOptRule

Parameters:

call - Rule call

See Also:

RelOptRule.matches(RelOptRuleCall)

splitFilters

private static org.apache.commons.lang3.tuple.Triple<java.util.List<RexNode>,java.util.List<RexNode>,java.util.List<RexNode>> splitFilters(RexBuilder rexBuilder,
                                                                                                                                                       DruidQuery input,
                                                                                                                                                       java.util.List<RexNode> validPreds,
                                                                                                                                                       java.util.List<RexNode> nonValidPreds,
                                                                                                                                                       int timestampFieldIdx)

Given a list of conditions that contain Druid valid operations and a list that contains those that contain any non-supported operation, it outputs a triple with three different categories: 1-l) condition filters on the timestamp column, 2-m) condition filters that can be pushed to Druid, 3-r) condition filters that cannot be pushed to Druid.