org.apache.derby.impl.sql.compile

Class LockTableNode

java.lang.Object

org.apache.derby.impl.sql.compile.QueryTreeNode

org.apache.derby.impl.sql.compile.StatementNode

org.apache.derby.impl.sql.compile.MiscellaneousStatementNode

org.apache.derby.impl.sql.compile.LockTableNode

All Implemented Interfaces:

Visitable

class LockTableNode
extends MiscellaneousStatementNode

A LockTableNode is the root of a QueryTree that represents a LOCK TABLE command: LOCK TABLE IN SHARE/EXCLUSIVE MODE

Field Summary

Fields

Modifier and Type	Field and Description
private long	conglomerateNumber
private boolean	exclusiveMode
private TableDescriptor	lockTableDescriptor
private TableName	tableName

Fields inherited from class org.apache.derby.impl.sql.compile.StatementNode

EMPTY_TD_LIST, NEED_CURSOR_ACTIVATION, NEED_DDL_ACTIVATION, NEED_NOTHING_ACTIVATION, NEED_PARAM_ACTIVATION, NEED_ROW_ACTIVATION

Fields inherited from class org.apache.derby.impl.sql.compile.QueryTreeNode

AUTOINCREMENT_CREATE_MODIFY, AUTOINCREMENT_CYCLE, AUTOINCREMENT_INC_INDEX, AUTOINCREMENT_IS_AUTOINCREMENT_INDEX, AUTOINCREMENT_START_INDEX

Constructor Summary

Constructors

Constructor and Description
LockTableNode(TableName tableName, boolean exclusiveMode, ContextManager cm)

Method Summary

Modifier and Type	Method and Description
(package private) void	acceptChildren(Visitor v) Accept a visitor on all child nodes.
void	bindStatement() Bind this LockTableNode.
ConstantAction	makeConstantAction() Create the Constant information that will drive the guts of Execution.
boolean	referencesSessionSchema() Return true if the node references SESSION schema tables (temporary or permanent)
(package private) java.lang.String	statementToString()
java.lang.String	toString() Convert this object to a String.

Methods inherited from class org.apache.derby.impl.sql.compile.MiscellaneousStatementNode

activationKind, generate, needsSavepoint

Methods inherited from class org.apache.derby.impl.sql.compile.StatementNode

executeSchemaName, executeStatementName, generate, getCursorInfo, getSPSName, isAtomic, lockTableForCompilation, makeResultDescription, optimizeStatement, updateIndexStatisticsFor

Methods inherited from class org.apache.derby.impl.sql.compile.QueryTreeNode

accept, addTag, addUDTUsagePriv, addUDTUsagePriv, bindOffsetFetch, bindRowMultiSet, bindUserCatalogType, bindUserType, checkReliability, checkReliability, convertDefaultNode, copyTagsFrom, createTypeDependency, debugFlush, debugPrint, disablePrivilegeCollection, formatNodeString, generateAuthorizeCheck, getBeginOffset, getClassFactory, getCompilerContext, getContext, getContextManager, getDataDictionary, getDependencyManager, getEndOffset, getExecutionFactory, getGenericConstantActionFactory, getIntProperty, getLanguageConnectionContext, getLongProperty, getNullNode, getOffsetOrderedNodes, getOptimizerFactory, getOptimizerTracer, getParameterTypes, getSchemaDescriptor, getSchemaDescriptor, getStatementType, getTableDescriptor, getTypeCompiler, getUDTDesc, isPrivilegeCollectionRequired, isSessionSchema, isSessionSchema, makeTableName, makeTableName, nodeHeader, optimizerTracingIsOn, orReliability, parseSearchCondition, parseStatement, printLabel, printSubNodes, resolveTableToSynonym, setBeginOffset, setEndOffset, setRefActionInfo, stackPrint, taggedWith, treePrint, treePrint, verifyClassExist

Methods inherited from class java.lang.Object

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

Field Detail

tableName

private TableName tableName

exclusiveMode

private boolean exclusiveMode

conglomerateNumber

private long conglomerateNumber

lockTableDescriptor

private TableDescriptor lockTableDescriptor

Constructor Detail

LockTableNode

LockTableNode(TableName tableName,
              boolean exclusiveMode,
              ContextManager cm)

Parameters:

tableName - The table to lock

exclusiveMode - Whether or not to get an exclusive lock.

cm - Context manager

Method Detail

toString

public java.lang.String toString()

Convert this object to a String. See comments in QueryTreeNode.java for how this should be done for tree printing.

Overrides:

toString in class StatementNode

Returns:

This object as a String

statementToString

java.lang.String statementToString()

Specified by:

statementToString in class StatementNode

bindStatement

public void bindStatement()
                   throws StandardException

Bind this LockTableNode. This means looking up the table, verifying it exists and getting the heap conglomerate number.

Overrides:

bindStatement in class StatementNode

Throws:

StandardException - Thrown on error

referencesSessionSchema

public boolean referencesSessionSchema()
                                throws StandardException

Return true if the node references SESSION schema tables (temporary or permanent)

Overrides:

referencesSessionSchema in class QueryTreeNode

Returns:

true if references SESSION schema tables, else false

Throws:

StandardException - Thrown on error

makeConstantAction

public ConstantAction makeConstantAction()
                                  throws StandardException

Create the Constant information that will drive the guts of Execution.

Overrides:

makeConstantAction in class QueryTreeNode

Throws:

StandardException - Thrown on failure

acceptChildren

void acceptChildren(Visitor v)
             throws StandardException

Description copied from class: QueryTreeNode

Accept a visitor on all child nodes. All sub-classes that add fields that should be visited, should override this method and call accept(v) on all visitable fields, as well as super.acceptChildren(v) to make sure all visitable fields defined by the super-class are accepted too.

Overrides:

acceptChildren in class QueryTreeNode

Parameters:

v - the visitor

Throws:

StandardException - on errors raised by the visitor