org.apache.hadoop.hive.ql.optimizer.ppr

Class PartitionExpressionForMetastore

java.lang.Object

org.apache.hadoop.hive.ql.optimizer.ppr.PartitionExpressionForMetastore

All Implemented Interfaces:

PartitionExpressionProxy

public class PartitionExpressionForMetastore
extends Object
implements PartitionExpressionProxy

The basic implementation of PartitionExpressionProxy that uses ql package classes.

Constructor Summary

Constructors

Constructor and Description
PartitionExpressionForMetastore()

Method Summary

Methods

Modifier and Type	Method and Description
String	convertExprToFilter(byte[] exprBytes) Converts serialized Hive expression into filter in the format suitable for Filter.g.
boolean	filterPartitionsByExpr(List<String> partColumnNames, List<PrimitiveTypeInfo> partColumnTypeInfos, byte[] exprBytes, String defaultPartitionName, List<String> partitionNames) Filters the partition names via serialized Hive expression.

Methods inherited from class java.lang.Object

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

Constructor Detail

PartitionExpressionForMetastore

public PartitionExpressionForMetastore()

Method Detail

convertExprToFilter

public String convertExprToFilter(byte[] exprBytes)
                           throws MetaException

Description copied from interface: PartitionExpressionProxy

Converts serialized Hive expression into filter in the format suitable for Filter.g.

Specified by:

convertExprToFilter in interface PartitionExpressionProxy

Parameters:

exprBytes - Serialized expression.

Returns:

The filter string.

Throws:

MetaException

filterPartitionsByExpr

public boolean filterPartitionsByExpr(List<String> partColumnNames,
                             List<PrimitiveTypeInfo> partColumnTypeInfos,
                             byte[] exprBytes,
                             String defaultPartitionName,
                             List<String> partitionNames)
                               throws MetaException

Description copied from interface: PartitionExpressionProxy

Filters the partition names via serialized Hive expression.

Specified by:

filterPartitionsByExpr in interface PartitionExpressionProxy

Parameters:

partColumnNames - Partition column names in the underlying table.

partColumnTypeInfos - Partition column types in the underlying table

exprBytes - Serialized expression.

defaultPartitionName - Default partition name from job or server configuration.

partitionNames - Partition names; the list is modified in place.

Returns:

Whether there were any unknown partitions preserved in the name list.

Throws:

MetaException