Top Description Fields Constructors Methods
org.h2.expression.function

public final Class CompressFunction

extends Function1_2
Class Inheritance
Imports
org.h2.engine.SessionLocal, org.h2.expression.Expression, .TypedValueExpression, org.h2.message.DbException, org.h2.tools.CompressTool, org.h2.value.TypeInfo, .Value, .ValueVarbinary
A COMPRESS or EXPAND function.

Field Summary

Modifier and TypeField and Description
public static final int
COMPRESS

COMPRESS() (non-standard).

public static final int
EXPAND

EXPAND() (non-standard).

private final int
function

private static final String[]
NAMES

Constructor Summary

AccessConstructor and Description
public
CompressFunction(Expression arg1, Expression arg2, int function)

Method Summary

Modifier and TypeMethod and Description
public String
getName()

Implements org.h2.expression.function.NamedExpression.getName.

Get the name.

public Value
getValue(SessionLocal
the session
session, Value
the value of first argument
v1, Value
the value of second argument, or null
v2)

Overrides org.h2.expression.function.Function1_2.getValue.

Returns the value of this function.

public Expression
optimize(SessionLocal
the session
session)

Implements abstract org.h2.expression.Expression.optimize.

Try to optimize the expression.

Inherited from org.h2.expression.function.Function1_2:
getUnenclosedSQLgetValue

Field Detail

COMPRESSback to summary
public static final int COMPRESS

COMPRESS() (non-standard).

EXPANDback to summary
public static final int EXPAND

EXPAND() (non-standard).

functionback to summary
private final int function
NAMESback to summary
private static final String[] NAMES

Constructor Detail

CompressFunctionback to summary
public CompressFunction(Expression arg1, Expression arg2, int function)

Method Detail

getNameback to summary
public String getName()

Implements org.h2.expression.function.NamedExpression.getName.

Doc from org.h2.expression.function.NamedExpression.getName.

Get the name.

Returns:String

the name in uppercase

Annotations
@Override
getValueback to summary
public Value getValue(SessionLocal session, Value v1, Value v2)

Overrides org.h2.expression.function.Function1_2.getValue.

Doc from org.h2.expression.function.Function1_2.getValue.

Returns the value of this function.

Parameters
session:SessionLocal

the session

v1:Value

the value of first argument

v2:Value

the value of second argument, or null

Returns:Value

the resulting value

Annotations
@Override
optimizeback to summary
public Expression optimize(SessionLocal session)

Implements abstract org.h2.expression.Expression.optimize.

Doc from org.h2.expression.Expression.optimize.

Try to optimize the expression.

Parameters
session:SessionLocal

the session

Returns:Expression

the optimized expression

Annotations
@Override