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

public final Class FileFunction

extends Function1_2
Class Inheritance
Imports
java.io.IOException, .InputStream, .InputStreamReader, .OutputStream, .Reader, java.nio.file.Files, .Paths, org.h2.engine.Database, .SessionLocal, org.h2.expression.Expression, .ExpressionVisitor, org.h2.message.DbException, org.h2.store.fs.FileUtils, org.h2.util.IOUtils, org.h2.value.TypeInfo, .Value, .ValueBigint, .ValueLob, .ValueNull
A FILE_READ or FILE_WRITE function.

Field Summary

Modifier and TypeField and Description
public static final int
FILE_READ

FILE_READ() (non-standard).

public static final int
FILE_WRITE

FILE_WRITE() (non-standard).

private final int
function

private static final String[]
NAMES

Constructor Summary

AccessConstructor and Description
public
FileFunction(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)

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

Return the resulting value for the current row.

public boolean
isEverything(ExpressionVisitor
the visitor
visitor)

Overrides org.h2.expression.Operation1_2.isEverything.

Check if this expression and all sub-expressions can fulfill a criteria.

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

FILE_READback to summary
public static final int FILE_READ

FILE_READ() (non-standard).

FILE_WRITEback to summary
public static final int FILE_WRITE

FILE_WRITE() (non-standard).

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

Constructor Detail

FileFunctionback to summary
public FileFunction(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)

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

Doc from org.h2.expression.Expression.getValue.

Return the resulting value for the current row.

Parameters
session:SessionLocal

the session

Returns:Value

the result

Annotations
@Override
isEverythingback to summary
public boolean isEverything(ExpressionVisitor visitor)

Overrides org.h2.expression.Operation1_2.isEverything.

Doc from org.h2.expression.Expression.isEverything.

Check if this expression and all sub-expressions can fulfill a criteria. If any part returns false, the result is false.

Parameters
visitor:ExpressionVisitor

the visitor

Returns:boolean

if the criteria can be fulfilled

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