net.sf.farrago.ddl
Class DdlStmt

java.lang.Object
  net.sf.farrago.ddl.DdlStmt

All Implemented Interfaces:

FarragoSessionDdlStmt

Direct Known Subclasses:

DdlAlterStmt, DdlAnalyzeStmt, DdlCheckpointStmt, DdlCreateStmt, DdlDeallocateOldStmt, DdlDropStmt, DdlExtendCatalogStmt, DdlGrantStmt, DdlImportForeignSchemaStmt, DdlReloadTableStmt, DdlReplaceCatalogStmt, DdlSetContextStmt, DdlSetParamStmt, DdlSetSessionImplementationStmt, DdlSetSessionParamStmt, DdlTruncateStmt, DdlTxnStmt

public abstract class DdlStmt
extends Object
implements FarragoSessionDdlStmt

DdlStmt represents the output of DDL statement parsing. Most DDL statements update the catalog directly as they are parsed. DdlStmt does not duplicate the information written to the catalog; it only references and annotates it.

Version:

$Id: //open/dev/farrago/src/net/sf/farrago/ddl/DdlStmt.java#19 $

Author:

John V. Sichi

Field Summary

private CwmModelElement	modelElement
private boolean	runsAsDml True if the DDL statement is treated as a DML statement with respect to how locking behaves

Constructor Summary

protected	DdlStmt(CwmModelElement modelElement)
protected	DdlStmt(CwmModelElement modelElement, boolean runsAsDml)

Method Summary

CwmModelElement	getModelElement()
boolean	isDropRestricted()
void	postCommit(FarragoSessionDdlValidator ddlValidator) Called after execution, after committing the repository transaction.
void	postExecute() Called immediately after generic execution.
void	preExecute() Called before generic execution.
void	preValidate(FarragoSessionDdlValidator ddlValidator) Called before generic validation.
boolean	requiresCommit()
boolean	runsAsDml()
abstract void	visit(DdlVisitor visitor) Invokes a visitor on this statement.

Methods inherited from class java.lang.Object

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

Field Detail

modelElement

private final CwmModelElement modelElement

runsAsDml

private final boolean runsAsDml

True if the DDL statement is treated as a DML statement with respect to how locking behaves

Constructor Detail

DdlStmt

protected DdlStmt(CwmModelElement modelElement)

DdlStmt

protected DdlStmt(CwmModelElement modelElement,
                  boolean runsAsDml)

Method Detail

getModelElement

public CwmModelElement getModelElement()

Specified by:

getModelElement in interface FarragoSessionDdlStmt

Returns:

the top-level CwmModelElement affected by this stmt, or null if none

isDropRestricted

public boolean isDropRestricted()

Specified by:

isDropRestricted in interface FarragoSessionDdlStmt

Returns:

whether DROP RESTRICT is in effect

preValidate

public void preValidate(FarragoSessionDdlValidator ddlValidator)

Description copied from interface: FarragoSessionDdlStmt

Called before generic validation.

Specified by:

preValidate in interface FarragoSessionDdlStmt

Parameters:

ddlValidator - the object validating this stmt

preExecute

public void preExecute()

Description copied from interface: FarragoSessionDdlStmt

Called before generic execution.

Specified by:

preExecute in interface FarragoSessionDdlStmt

postExecute

public void postExecute()

Description copied from interface: FarragoSessionDdlStmt

Called immediately after generic execution.

Specified by:

postExecute in interface FarragoSessionDdlStmt

postCommit

public void postCommit(FarragoSessionDdlValidator ddlValidator)

Description copied from interface: FarragoSessionDdlStmt

Called after execution, after committing the repository transaction.

Specified by:

postCommit in interface FarragoSessionDdlStmt

Parameters:

ddlValidator - the object validating this stmt

requiresCommit

public boolean requiresCommit()

Specified by:

requiresCommit in interface FarragoSessionDdlStmt

Returns:

true if this statement implies an auto-commit before and after

runsAsDml

public boolean runsAsDml()

Specified by:

runsAsDml in interface FarragoSessionDdlStmt

Returns:

true if this DDL statement should be treated like a DML statement with respect to locking

visit

public abstract void visit(DdlVisitor visitor)

Invokes a visitor on this statement.

Parameters:

visitor - DdlVisitor to invoke