org.h2.command.dml

Class ScriptCommand

java.lang.Object

org.h2.command.Prepared

org.h2.command.dml.ScriptCommand

All Implemented Interfaces:

DataHandler

public class ScriptCommand
extends Prepared

This class represents the statement SCRIPT

Field Summary

Fields

Modifier and Type	Field and Description
protected InputStream	in The input stream.
protected OutputStream	out The output stream.

Fields inherited from class org.h2.command.Prepared

create, parameters, prepareAlways, session, sqlStatement

Constructor Summary

Constructors

Constructor and Description
ScriptCommand(Session session)

Method Summary

Methods

Modifier and Type	Method and Description
void	checkPowerOff() Check if the simulated power failure occurred.
void	checkWritingAllowed() Check if writing is allowed.
static InputStream	combineBlob(Connection conn, int id) Combine a BLOB.
static Reader	combineClob(Connection conn, int id) Combine a CLOB.
void	freeUpDiskSpace() Free up disk space if possible.
String	getDatabasePath() Get the database path.
protected String	getFileName()
String	getLobCompressionAlgorithm(int type) Get the compression algorithm used for large objects.
Connection	getLobConnection() Get a database connection to be used for LOB access.
SmallLRUCache<String,String[]>	getLobFileListCache() Get the lob file list cache if it is used.
LobStorage	getLobStorage() Get the lob storage mechanism to use.
Object	getLobSyncObject() Get the synchronization object for lob operations.
int	getMaxLengthInplaceLob() Get the maximum length of a in-place large object
TempFileDeleter	getTempFileDeleter() Get the temp file deleter mechanism.
int	getType() Get the command type as defined in CommandInterface
boolean	isQuery() Check if this object is a query.
boolean	isTransactional() Check if this command is transactional.
boolean	needRecompile() Check if the statement needs to be re-compiled.
FileStore	openFile(String name, String mode, boolean mustExist) Open a file at the given location.
ResultInterface	query(int maxrows) Execute the query.
ResultInterface	queryMeta() Get an empty result set containing the meta data.
void	setCharset(String charset)
void	setCipher(String c)
void	setCompressionAlgorithm(String algorithm)
void	setData(boolean data)
void	setDrop(boolean drop)
void	setFileNameExpr(Expression file)
void	setLobBlockSize(long blockSize)
void	setPassword(char[] password)
void	setPasswords(boolean passwords)
void	setSettings(boolean settings)
void	setSimple(boolean simple)

Methods inherited from class org.h2.command.Prepared

checkCanceled, checkParameters, getCurrentObjectId, getCurrentRowNumber, getObjectId, getParameters, getPlanSQL, getSQL, getSQL, getSQL, isCacheable, isReadOnly, prepare, setCommand, setCurrentRowNumber, setObjectId, setParameterList, setPrepareAlways, setRow, setSession, setSQL, toString, update

Methods inherited from class java.lang.Object

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

Field Detail

out

protected OutputStream out

The output stream.

in

protected InputStream in

The input stream.

Constructor Detail

ScriptCommand

public ScriptCommand(Session session)

Method Detail

isQuery

public boolean isQuery()

Description copied from class: Prepared

Check if this object is a query.

Overrides:

isQuery in class Prepared

Returns:

true if it is

setData

public void setData(boolean data)

setPasswords

public void setPasswords(boolean passwords)

setSettings

public void setSettings(boolean settings)

setLobBlockSize

public void setLobBlockSize(long blockSize)

setDrop

public void setDrop(boolean drop)

queryMeta

public ResultInterface queryMeta()

Description copied from class: Prepared

Get an empty result set containing the meta data.

Specified by:

queryMeta in class Prepared

Returns:

the result set

query

public ResultInterface query(int maxrows)

Description copied from class: Prepared

Execute the query.

Overrides:

query in class Prepared

Parameters:

maxrows - the maximum number of rows to return

Returns:

the result set

combineBlob

public static InputStream combineBlob(Connection conn,
                      int id)
                               throws SQLException

Combine a BLOB. This method is called from the script. When calling with id -1, the file is deleted.

Parameters:

conn - a connection

id - the lob id

Returns:

a stream for the combined data

Throws:

SQLException

combineClob

public static Reader combineClob(Connection conn,
                 int id)
                          throws SQLException

Combine a CLOB. This method is called from the script.

Parameters:

conn - a connection

id - the lob id

Returns:

a reader for the combined data

Throws:

SQLException

setSimple

public void setSimple(boolean simple)

setCharset

public void setCharset(String charset)

getType

public int getType()

Description copied from class: Prepared

Get the command type as defined in CommandInterface

Specified by:

getType in class Prepared

Returns:

the statement type

setCipher

public void setCipher(String c)

setPassword

public void setPassword(char[] password)

setFileNameExpr

public void setFileNameExpr(Expression file)

getFileName

protected String getFileName()

isTransactional

public boolean isTransactional()

Description copied from class: Prepared

Check if this command is transactional. If it is not, then it forces the current transaction to commit.

Specified by:

isTransactional in class Prepared

Returns:

true if it is

needRecompile

public boolean needRecompile()

Description copied from class: Prepared

Check if the statement needs to be re-compiled.

Overrides:

needRecompile in class Prepared

Returns:

true if it must

getDatabasePath

public String getDatabasePath()

Description copied from interface: DataHandler

Get the database path.

Specified by:

getDatabasePath in interface DataHandler

Returns:

the database path

openFile

public FileStore openFile(String name,
                 String mode,
                 boolean mustExist)

Description copied from interface: DataHandler

Open a file at the given location.

Specified by:

openFile in interface DataHandler

Parameters:

name - the file name

mode - the mode

mustExist - whether the file must already exist

Returns:

the file

checkPowerOff

public void checkPowerOff()

Description copied from interface: DataHandler

Check if the simulated power failure occurred. This call will decrement the countdown.

Specified by:

checkPowerOff in interface DataHandler

checkWritingAllowed

public void checkWritingAllowed()

Description copied from interface: DataHandler

Check if writing is allowed.

Specified by:

checkWritingAllowed in interface DataHandler

freeUpDiskSpace

public void freeUpDiskSpace()

Description copied from interface: DataHandler

Free up disk space if possible. This method is called if more space is needed.

Specified by:

freeUpDiskSpace in interface DataHandler

getMaxLengthInplaceLob

public int getMaxLengthInplaceLob()

Description copied from interface: DataHandler

Get the maximum length of a in-place large object

Specified by:

getMaxLengthInplaceLob in interface DataHandler

Returns:

the maximum size

getTempFileDeleter

public TempFileDeleter getTempFileDeleter()

Description copied from interface: DataHandler

Get the temp file deleter mechanism.

Specified by:

getTempFileDeleter in interface DataHandler

Returns:

the temp file deleter

getLobCompressionAlgorithm

public String getLobCompressionAlgorithm(int type)

Description copied from interface: DataHandler

Get the compression algorithm used for large objects.

Specified by:

getLobCompressionAlgorithm in interface DataHandler

Parameters:

type - the data type (CLOB or BLOB)

Returns:

the compression algorithm, or null

setCompressionAlgorithm

public void setCompressionAlgorithm(String algorithm)

getLobSyncObject

public Object getLobSyncObject()

Description copied from interface: DataHandler

Get the synchronization object for lob operations.

Specified by:

getLobSyncObject in interface DataHandler

Returns:

the synchronization object

getLobFileListCache

public SmallLRUCache<String,String[]> getLobFileListCache()

Description copied from interface: DataHandler

Get the lob file list cache if it is used.

Specified by:

getLobFileListCache in interface DataHandler

Returns:

the cache or null

getLobStorage

public LobStorage getLobStorage()

Description copied from interface: DataHandler

Get the lob storage mechanism to use.

Specified by:

getLobStorage in interface DataHandler

Returns:

the lob storage mechanism

getLobConnection

public Connection getLobConnection()

Description copied from interface: DataHandler

Get a database connection to be used for LOB access.

Specified by:

getLobConnection in interface DataHandler

Returns:

the connection or null