org.apache.hadoop.hive.ql.optimizer.calcite.rules

Class PartitionPrune

java.lang.Object

org.apache.hadoop.hive.ql.optimizer.calcite.rules.PartitionPrune

public class PartitionPrune
extends Object

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	PartitionPrune.ExtractPartPruningPredicate
static class	PartitionPrune.ExtractRemainingPredicate

Constructor Summary

Constructors

Constructor and Description
PartitionPrune()

Method Summary

Methods

Modifier and Type	Method and Description
static org.apache.calcite.util.Pair<org.apache.calcite.rex.RexNode,org.apache.calcite.rex.RexNode>	extractPartitionPredicates(org.apache.calcite.plan.RelOptCluster cluster, RelOptHiveTable hiveTable, org.apache.calcite.rex.RexNode predicate) Breaks the predicate into 2 pieces.

Methods inherited from class java.lang.Object

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

Constructor Detail

PartitionPrune

public PartitionPrune()

Method Detail

extractPartitionPredicates

public static org.apache.calcite.util.Pair<org.apache.calcite.rex.RexNode,org.apache.calcite.rex.RexNode> extractPartitionPredicates(org.apache.calcite.plan.RelOptCluster cluster,
                                                                                                                     RelOptHiveTable hiveTable,
                                                                                                                     org.apache.calcite.rex.RexNode predicate)

Breaks the predicate into 2 pieces. The first piece is the expressions that only contain partition columns and can be used for Partition Pruning; the second piece is the predicates that are left.

Parameters:

cluster -

hiveTable -

predicate -

Returns:

a Pair of expressions, each of which maybe null. The 1st predicate is expressions that only contain partition columns; the 2nd predicate contains the remaining predicates.