org.apache.derby.impl.sql.compile
Class AlterTableNode

java.lang.Object
  org.apache.derby.impl.sql.compile.QueryTreeNode
      org.apache.derby.impl.sql.compile.StatementNode
          org.apache.derby.impl.sql.compile.DDLStatementNode
              org.apache.derby.impl.sql.compile.AlterTableNode

All Implemented Interfaces:

Visitable

public class AlterTableNode

extends DDLStatementNode

A AlterTableNode represents a DDL statement that alters a table. It contains the name of the object to be created.

Author:

Jerry Brenner

Field Summary

TableDescriptor	baseTable
int	behavior
private int	changeType
protected ColumnInfo[]	colInfos
boolean	compressTable
protected ConstraintConstantAction[]	conActions
char	lockGranularity
protected int	numConstraints
protected SchemaDescriptor	schemaDescriptor
boolean	sequential
TableElementList	tableElementList
private boolean	truncateTable

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

ADD_TYPE, DROP_TYPE, implicitCreateSchema, LOCKING_TYPE, MODIFY_TYPE, UNKNOWN_TYPE

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

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_INC_INDEX, AUTOINCREMENT_IS_AUTOINCREMENT_INDEX, AUTOINCREMENT_START_INDEX, beginOffset, endOffset

Constructor Summary

AlterTableNode()

Method Summary

QueryTreeNode	bind() Bind this AlterTableNode.
void	genColumnInfo() Generate the ColumnInfo argument for the constant action.
int	getChangeType()
void	init(java.lang.Object objectName) Initializer for a TRUNCATE TABLE
void	init(java.lang.Object objectName, java.lang.Object sequential) Initializer for a AlterTableNode for COMPRESS
void	init(java.lang.Object objectName, java.lang.Object tableElementList, java.lang.Object lockGranularity, java.lang.Object changeType, java.lang.Object behavior, java.lang.Object sequential) Initializer for a AlterTableNode
ConstantAction	makeConstantAction() Create the Constant information that will drive the guts of Execution.
void	prepConstantAction() Generate arguments to constant action.
boolean	referencesSessionSchema() Return true if the node references SESSION schema tables (temporary or permanent)
java.lang.String	statementToString()
java.lang.String	toString() Convert this object to a String.

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

activationKind, bindName, generate, getFullName, getObjectName, getRelativeName, getSchemaDescriptor, getTableDescriptor, getTableDescriptor, getTableDescriptor, initAndCheck, isAtomic

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

generate, lockTableForCompilation

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

accept, convertDefaultNode, debugFlush, debugPrint, executeSchemaName, executeStatementName, formatNodeString, foundString, generateAuthorizeCheck, getBeginOffset, getClassFactory, getCompilerContext, getContextManager, getCursorInfo, getDataDictionary, getDependencyManager, getEndOffset, getExecutionFactory, getGenericConstantActionFactory, getIntProperty, getLanguageConnectionContext, getNodeFactory, getNodeType, getNullNode, getParameterTypes, getRowEstimate, getSchemaDescriptor, getSchemaDescriptor, getSPSName, getStatementType, getTableDescriptor, getTypeCompiler, init, init, init, init, init, init, init, init, init, init, init, isInstanceOf, isSessionSchema, isSessionSchema, makeResultDescription, makeTableName, needsSavepoint, nodeHeader, optimize, parseQueryText, printLabel, printSubNodes, resolveTableToSynonym, setBeginOffset, setContextManager, setEndOffset, setNodeType, setRefActionInfo, treePrint, treePrint, verifyClassExist

Methods inherited from class java.lang.Object

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

Field Detail

tableElementList

public TableElementList tableElementList

lockGranularity

public char lockGranularity

compressTable

public boolean compressTable

sequential

public boolean sequential

behavior

public int behavior

baseTable

public TableDescriptor baseTable

numConstraints

protected int numConstraints

changeType

private int changeType

truncateTable

private boolean truncateTable

schemaDescriptor

protected SchemaDescriptor schemaDescriptor

colInfos

protected ColumnInfo[] colInfos

conActions

protected ConstraintConstantAction[] conActions

Constructor Detail

AlterTableNode

public AlterTableNode()

Method Detail

init

public void init(java.lang.Object objectName)
          throws StandardException

Initializer for a TRUNCATE TABLE

Overrides:

init in class DDLStatementNode

Parameters:

objectName - The name of the table being truncated

Throws:

StandardException - Thrown on error

init

public void init(java.lang.Object objectName,
                 java.lang.Object sequential)
          throws StandardException

Initializer for a AlterTableNode for COMPRESS

Overrides:

init in class QueryTreeNode

Parameters:

objectName - The name of the table being altered

sequential - Whether or not the COMPRESS is SEQUENTIAL

Throws:

StandardException - Thrown on error

init

public void init(java.lang.Object objectName,
                 java.lang.Object tableElementList,
                 java.lang.Object lockGranularity,
                 java.lang.Object changeType,
                 java.lang.Object behavior,
                 java.lang.Object sequential)
          throws StandardException

Initializer for a AlterTableNode

Overrides:

init in class QueryTreeNode

Parameters:

objectName - The name of the table being altered

tableElementList - The alter table action

lockGranularity - The new lock granularity, if any

changeType - ADD_TYPE or DROP_TYPE

Throws:

StandardException - Thrown on error

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 DDLStatementNode

Returns:

This object as a String

statementToString

public java.lang.String statementToString()

Specified by:

statementToString in class StatementNode

getChangeType

public int getChangeType()

bind

public QueryTreeNode bind()
                   throws StandardException

Bind this AlterTableNode. This means doing any static error checking that can be done before actually creating the table. For example, verifying that the user is not trying to add a non-nullable column.

Overrides:

bind in class QueryTreeNode

Returns:

The bound query tree

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

prepConstantAction

public void prepConstantAction()
                        throws StandardException

Generate arguments to constant action. Called by makeConstantAction() in this class and in our subclass RepAlterTableNode.

Throws:

StandardException - Thrown on failure

genColumnInfo

public void genColumnInfo()

Generate the ColumnInfo argument for the constant action. Return the number of constraints.

Returns:

number of constraints