Top Description Fields Constructors Methods
org.apache.derby.impl.sql.compile

pack-priv Class LockTableNode

extends MiscellaneousStatementNode
Class Inheritance
Imports
org.apache.derby.shared.common.error.StandardException, org.apache.derby.shared.common.reference.SQLState, org.apache.derby.iapi.services.context.ContextManager, org.apache.derby.shared.common.sanity.SanityManager, org.apache.derby.iapi.sql.compile.CompilerContext, .Visitor, org.apache.derby.iapi.sql.conn.Authorizer, org.apache.derby.iapi.sql.dictionary.ConglomerateDescriptor, .SchemaDescriptor, .TableDescriptor, org.apache.derby.iapi.sql.execute.ConstantAction
A LockTableNode is the root of a QueryTree that represents a LOCK TABLE command: LOCK TABLE IN SHARE/EXCLUSIVE MODE

Field Summary

Modifier and TypeField and Description
private long
conglomerateNumber

private boolean
exclusiveMode

private TableDescriptor
lockTableDescriptor

private TableName
tableName

Constructor Summary

AccessConstructor and Description
pack-priv
LockTableNode(TableName
The table to lock
tableName, boolean
Whether or not to get an exclusive lock.
exclusiveMode, ContextManager
Context manager
cm)

Method Summary

Modifier and TypeMethod and Description
pack-priv void
acceptChildren(Visitor
the visitor
v)

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

Accept a visitor on all child nodes.

public void
bindStatement()

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

Bind this LockTableNode.

public ConstantAction
makeConstantAction()

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

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

public boolean

Returns:

true if references SESSION schema tables, else false
referencesSessionSchema()

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

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

pack-priv String
statementToString()

Implements abstract org.apache.derby.impl.sql.compile.StatementNode.statementToString.

public String

Returns:

This object as a String
toString()

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

Convert this object to a String.

Inherited from org.apache.derby.impl.sql.compile.MiscellaneousStatementNode:
activationKindgenerateneedsSavepoint

Field Detail

conglomerateNumberback to summary
private long conglomerateNumber
exclusiveModeback to summary
private boolean exclusiveMode
lockTableDescriptorback to summary
private TableDescriptor lockTableDescriptor
tableNameback to summary
private TableName tableName

Constructor Detail

LockTableNodeback to summary
pack-priv LockTableNode(TableName tableName, boolean exclusiveMode, ContextManager cm)
Parameters
tableName:TableName

The table to lock

exclusiveMode:boolean

Whether or not to get an exclusive lock.

cm:ContextManager

Context manager

Method Detail

acceptChildrenback to summary
pack-priv void acceptChildren(Visitor v) throws StandardException

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

Doc from org.apache.derby.impl.sql.compile.QueryTreeNode.acceptChildren.

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.

Parameters
v:Visitor

the visitor

Annotations
@Override
Exceptions
StandardException:
on errors raised by the visitor
bindStatementback to summary
public void bindStatement() throws StandardException

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

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

Annotations
@Override
Exceptions
StandardException:
Thrown on error
makeConstantActionback to summary
public ConstantAction makeConstantAction() throws StandardException

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

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

Annotations
@Override
Exceptions
StandardException:
Thrown on failure
referencesSessionSchemaback to summary
public boolean referencesSessionSchema() throws StandardException

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

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

Returns:boolean

true if references SESSION schema tables, else false

Annotations
@Override
Exceptions
StandardException:
Thrown on error
statementToStringback to summary
pack-priv String statementToString()

Implements abstract org.apache.derby.impl.sql.compile.StatementNode.statementToString.

toStringback to summary
public String toString()

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

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

Returns:String

This object as a String

Annotations
@Override