org.apache.hadoop.hive.metastore.txn.jdbc

Class InClauseBatchCommand<T>

java.lang.Object

org.apache.hadoop.hive.metastore.txn.jdbc.InClauseBatchCommand<T>

Type Parameters:

T -

All Implemented Interfaces:

ParameterizedQuery

Direct Known Subclasses:

DeleteInvalidOpenTxnsCommand, RemoveTxnsFromMinHistoryLevelCommand, RemoveWriteIdsFromMinHistoryCommand

public class InClauseBatchCommand<T>
extends Object
implements ParameterizedQuery

Represents a query with an IN() clause. The values inside the IN() clause are passed separately

Constructor Summary

Constructors

Constructor and Description
InClauseBatchCommand(String query, org.springframework.jdbc.core.namedparam.SqlParameterSource queryParameters, String inClauseParameterName, Comparator<T> parmeterLengthComparator)

Method Summary

Modifier and Type	Method and Description
String	getInClauseParameterName()
String	getParameterizedQueryString(DatabaseProduct databaseProduct) The parameterized query string.
Comparator<T>	getParameterLengthComparator()
org.springframework.jdbc.core.namedparam.SqlParameterSource	getQueryParameters() An SqlParameterSource instance containing the required parameters for the query string.

Methods inherited from class java.lang.Object

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

Constructor Detail

InClauseBatchCommand

public InClauseBatchCommand(String query,
                            org.springframework.jdbc.core.namedparam.SqlParameterSource queryParameters,
                            String inClauseParameterName,
                            Comparator<T> parmeterLengthComparator)

Method Detail

getParameterizedQueryString

public String getParameterizedQueryString(DatabaseProduct databaseProduct)

The parameterized query string. The query must have exactly parameter inside the IN clause, and can have zero or more parameters everywhere else in the query string.

Specified by:

getParameterizedQueryString in interface ParameterizedQuery

Parameters:

databaseProduct - A DatabaseProduct instance representing the type of the underlying HMS dabatabe.

Returns:

Returns the parameterized query string.

See Also:

ParameterizedQuery.getParameterizedQueryString(DatabaseProduct)

getQueryParameters

public org.springframework.jdbc.core.namedparam.SqlParameterSource getQueryParameters()

Description copied from interface: ParameterizedQuery

An SqlParameterSource instance containing the required parameters for the query string. If the query is not parameterized, this method can either return null or an empty SqlParameterSource.

Specified by:

getQueryParameters in interface ParameterizedQuery

Returns:

Returns the SqlParameterSource containing the parameters for the query.

getInClauseParameterName

public String getInClauseParameterName()

Returns:

Returns with the name of the parameter which is inside the IN clause.

getParameterLengthComparator

public Comparator<T> getParameterLengthComparator()

Returns:

Returns a Comparator instance which can be used to determine the longest element in the list IN clause parameters. This is required to be able to estimate the final legth of the command.