Package de.akquinet.jbosscc.guttenbase.statements

Class SplitByColumnSelectCountStatementCreator

java.lang.Object

de.akquinet.jbosscc.guttenbase.statements.AbstractStatementCreator

de.akquinet.jbosscc.guttenbase.statements.AbstractSelectStatementCreator

de.akquinet.jbosscc.guttenbase.statements.SplitByColumnSelectCountStatementCreator

public class SplitByColumnSelectCountStatementCreator
extends AbstractSelectStatementCreator

Sometimes the amount of data in the result set 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.

With this statement we count the number of rows that actually will be read for the given chunk.

© 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
SplitByColumnSelectCountStatementCreator(ConnectorRepository connectorRepository, String connectorId)

Method Summary

Modifier and Type	Method	Description
protected String	createColumnClause(List<ColumnMetaData> columns)
protected String	createWhereClause(TableMetaData tableMetaData)

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

createMappedSelectStatement, createOrderBy, createSelectStatement

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

getMappedTargetColumns

Methods inherited from class java.lang.Object

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

Constructor Detail

SplitByColumnSelectCountStatementCreator

public SplitByColumnSelectCountStatementCreator(ConnectorRepository connectorRepository,
                                                String connectorId)

Method Detail

createColumnClause

protected String createColumnClause(List<ColumnMetaData> columns)

Overrides:

createColumnClause in class AbstractStatementCreator

createWhereClause

protected String createWhereClause(TableMetaData tableMetaData)

Overrides:

createWhereClause in class AbstractSelectStatementCreator