com.sun.jdo.spi.persistence.support.sqlstore.sql.generator

Class CorrelatedSelectPlan

java.lang.Object

com.sun.jdo.spi.persistence.support.sqlstore.sql.generator.QueryPlan

com.sun.jdo.spi.persistence.support.sqlstore.sql.generator.SelectQueryPlan

com.sun.jdo.spi.persistence.support.sqlstore.sql.generator.CorrelatedSelectPlan

Direct Known Subclasses:

CorrelatedExistSelectPlan, CorrelatedInSelectPlan

public abstract class CorrelatedSelectPlan
extends SelectQueryPlan

Implements the select plan for correlated subqueries.

Author:

Mitesh Meswani, Markus Fuchs

Field Summary

Fields

Modifier and Type	Field and Description
protected SelectQueryPlan	parentPlan The parent plan for this subquery

Fields inherited from class com.sun.jdo.spi.persistence.support.sqlstore.sql.generator.SelectQueryPlan

constraint, MULTILEVEL_PREFETCH_PROPERTY, options, parentField, ST_C_BUILT, ST_OC_BUILT

Fields inherited from class com.sun.jdo.spi.persistence.support.sqlstore.sql.generator.QueryPlan

ACT_DELETE, ACT_INSERT, ACT_NOOP, ACT_SELECT, ACT_UPDATE, action, config, messages, ST_BUILT, statements, status, store, tables

Constructor Summary

Constructors

Constructor and Description
CorrelatedSelectPlan(RetrieveDesc desc, SQLStoreManager store, ForeignFieldDesc parentField, SelectQueryPlan parentPlan)

Method Summary

Modifier and Type	Method and Description
protected void	addQueryTables(ArrayList columnList, ClassDesc config) Adds the query tables corresponding to the columns in columnList.
protected abstract void	doCorrelatedJoin() Must be implemented by the sub classes.
protected void	processConstraints() The constraints for correlated subqueries are added here.

Methods inherited from class com.sun.jdo.spi.persistence.support.sqlstore.sql.generator.SelectQueryPlan

addColumn, addJoinConstraint, addTable, build, getConstraint, getResult, newInstance, newStatement, processFields, processOrderConstraints, processStatements

Methods inherited from class com.sun.jdo.spi.persistence.support.sqlstore.sql.generator.QueryPlan

addQueryTable, addQueryTable, addQueryTables, addStatement, createStatement, findQueryTable, findQueryTable, getAction, getConfig, getStatement, getStatements

Methods inherited from class java.lang.Object

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

Field Detail

parentPlan

protected SelectQueryPlan parentPlan

The parent plan for this subquery

Constructor Detail

CorrelatedSelectPlan

public CorrelatedSelectPlan(RetrieveDesc desc,
                            SQLStoreManager store,
                            ForeignFieldDesc parentField,
                            SelectQueryPlan parentPlan)

Method Detail

processConstraints

protected void processConstraints()

The constraints for correlated subqueries are added here. The constraints are:

• The correlated constraint joining this subquery with the parent plan
• A join constraint if the parent field uses join table

Overrides:

processConstraints in class SelectQueryPlan

doCorrelatedJoin

protected abstract void doCorrelatedJoin()

Must be implemented by the sub classes.

addQueryTables

protected void addQueryTables(ArrayList columnList,
                              ClassDesc config)

Adds the query tables corresponding to the columns in columnList.

Parameters:

columnList - List of columns.

config - Class configuration corresponding to columns.