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

Class CorrelatedExistSelectPlan

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

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

public class CorrelatedExistSelectPlan
extends CorrelatedSelectPlan

Implements the select plan for Exist-Subqueries.

Author:

Mitesh Meswani, Markus Fuchs

Field Summary

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

parentPlan

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
CorrelatedExistSelectPlan(RetrieveDesc desc, SQLStoreManager store, ForeignFieldDesc parentField, SelectQueryPlan parentPlan)

Method Summary

Modifier and Type	Method and Description
protected void	doCorrelatedJoin() The correlated constraint joining this subquery with the parent field.
protected Statement	newStatement()
protected void	processFields() There are no real fields to be selected for an (NOT)EXIST query.

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

addQueryTables, processConstraints

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

addColumn, addJoinConstraint, addTable, build, getConstraint, getResult, newInstance, 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

Constructor Detail

CorrelatedExistSelectPlan

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

Method Detail

processFields

protected void processFields()

There are no real fields to be selected for an (NOT)EXIST query. This method just adds the table for the nested select. The statement for nested select is created as a side effect.

Overrides:

processFields in class SelectQueryPlan

doCorrelatedJoin

protected void doCorrelatedJoin()

The correlated constraint joining this subquery with the parent field. The joined table is added as a side-effect.

Specified by:

doCorrelatedJoin in class CorrelatedSelectPlan

newStatement

protected Statement newStatement()

Overrides:

newStatement in class SelectQueryPlan