Package de.akquinet.jbosscc.guttenbase.statements

Class SplitByColumnSelectStatementCreator

java.lang.Object

de.akquinet.jbosscc.guttenbase.statements.AbstractStatementCreator

de.akquinet.jbosscc.guttenbase.statements.AbstractSelectStatementCreator

de.akquinet.jbosscc.guttenbase.statements.SplitByColumnSelectStatementCreator

public class SplitByColumnSelectStatementCreator
extends AbstractSelectStatementCreator

Sometimes the amount of data exceeds any buffer. In these cases we need to split the data by some given range, usually the primary key. I.e., the data is read in chunks where these chunks are split using the ID column range of values.

© 2012-2034 akquinet tech@spree

Hint is used by SplitColumnHint

Author:

M. Dahm

Field Summary

Fields inherited from class de.akquinet.jbosscc.guttenbase.statements.AbstractSelectStatementCreator

FROM

Fields inherited from class de.akquinet.jbosscc.guttenbase.statements.AbstractStatementCreator

_columnMapper, _connectorId, _connectorRepository, LOG

Constructor Summary

Constructors

Constructor	Description
SplitByColumnSelectStatementCreator(ConnectorRepository connectorRepository, String connectorId)

Method Summary

Modifier and Type	Method	Description
protected String	createOrderBy(TableMetaData tableMetaData)	Try to retrieve data in some deterministic order
protected String	createWhereClause(TableMetaData tableMetaData)

Methods inherited from class de.akquinet.jbosscc.guttenbase.statements.AbstractSelectStatementCreator

createMappedSelectStatement, createSelectStatement

Methods inherited from class de.akquinet.jbosscc.guttenbase.statements.AbstractStatementCreator

createColumnClause, getMappedTargetColumns

Methods inherited from class java.lang.Object

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

Constructor Detail

SplitByColumnSelectStatementCreator

public SplitByColumnSelectStatementCreator(ConnectorRepository connectorRepository,
                                           String connectorId)

Method Detail

createWhereClause

protected String createWhereClause(TableMetaData tableMetaData)

Overrides:

createWhereClause in class AbstractSelectStatementCreator

createOrderBy

protected String createOrderBy(TableMetaData tableMetaData)

Description copied from class: AbstractSelectStatementCreator

Try to retrieve data in some deterministic order

Overrides:

createOrderBy in class AbstractSelectStatementCreator