Package org.datanucleus.store.rdbms.sql

Class UpdateStatement

java.lang.Object

org.datanucleus.store.rdbms.sql.SQLStatement

org.datanucleus.store.rdbms.sql.UpdateStatement

public class UpdateStatement
extends SQLStatement

SQL UPDATE Statement representation. This will create a statement like

 UPDATE {tbl}
 SET {expr}={val}, {expr}={val}, ...
 WHERE {boolExpr} [AND|OR] {boolExpr} ...
 

Any joins are converted into a WHERE clause like

 EXISTS (SELECT * FROM OTHER_TBL ...)
 

Field Summary

Fields

Modifier and Type	Field	Description
protected SQLExpression[]	updates	Array of update expressions when the statement is an UPDATE.

Fields inherited from class org.datanucleus.store.rdbms.sql.SQLStatement

candidateClassName, clr, EXTENSION_LOCK_FOR_UPDATE, EXTENSION_LOCK_FOR_UPDATE_NOWAIT, EXTENSION_SQL_TABLE_NAMING_STRATEGY, extensions, joins, namer, parent, primaryTable, queryGenerator, rdbmsMgr, requiresJoinReorder, sql, tableGroups, tableNamerByName, tables, where

Constructor Summary

Constructors

Constructor	Description
UpdateStatement(RDBMSStoreManager rdbmsMgr, Table table, DatastoreIdentifier alias, String tableGroupName, Map<String,Object> extensions)	Constructor for an UPDATE statement.

Method Summary

Modifier and Type	Method	Description
SQLText	getSQLText()
boolean	hasUpdates()
void	setUpdates(SQLExpression[] exprs)	Method to set the UPDATE clause of the statement.

Methods inherited from class org.datanucleus.store.rdbms.sql.SQLStatement

addAndConditionToJoinForTable, addExtension, addJoin, getCandidateClassName, getClassLoaderResolver, getDatastoreAdapter, getJoinConditionForJoin, getJoinForTable, getJoinTypeForTable, getNumberOfTableGroups, getNumberOfTables, getParentStatement, getPrimaryTable, getQueryGenerator, getRDBMSManager, getSQLExpressionFactory, getTable, getTable, getTableForDatastoreContainer, getTableGroup, getTableNamer, getValueForExtension, invalidateStatement, isChildStatementOf, join, join, join, join, join, join, log, putSQLTableInGroup, removeCrossJoin, setCandidateClassName, setClassLoaderResolver, setQueryGenerator, whereAnd, whereOr

Methods inherited from class java.lang.Object

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

Field Detail

updates

protected SQLExpression[] updates

Array of update expressions when the statement is an UPDATE.

Constructor Detail

UpdateStatement

public UpdateStatement(RDBMSStoreManager rdbmsMgr,
                       Table table,
                       DatastoreIdentifier alias,
                       String tableGroupName,
                       Map<String,Object> extensions)

Constructor for an UPDATE statement.

Parameters:

rdbmsMgr - Store Manager

table - The primary table to UPDATE

alias - Alias for the primary table

tableGroupName - Group name for the primary table

extensions - Any extensions (optional)

Method Detail

setUpdates

public void setUpdates(SQLExpression[] exprs)

Method to set the UPDATE clause of the statement.

Parameters:

exprs - The update clause expression

hasUpdates

public boolean hasUpdates()

getSQLText

public SQLText getSQLText()

Overrides:

getSQLText in class SQLStatement