Package org.h2.expression.function

Class FileFunction

java.lang.Object

org.h2.expression.Expression

org.h2.expression.Operation1_2

org.h2.expression.function.Function1_2

org.h2.expression.function.FileFunction

All Implemented Interfaces:

NamedExpression, HasSQL, Typed

public final class FileFunction
extends Function1_2

A FILE_READ or FILE_WRITE function.

Field Summary

Fields

Modifier and Type	Field	Description
static int	FILE_READ	FILE_READ() (non-standard).
static int	FILE_WRITE	FILE_WRITE() (non-standard).
private int	function
private static java.lang.String[]	NAMES

Fields inherited from class org.h2.expression.Operation1_2

left, right, type

Fields inherited from class org.h2.expression.Expression

AUTO_PARENTHESES, MAP_IN_AGGREGATE, MAP_IN_WINDOW, MAP_INITIAL, WITH_PARENTHESES, WITHOUT_PARENTHESES

Fields inherited from interface org.h2.util.HasSQL

ADD_PLAN_INFORMATION, DEFAULT_SQL_FLAGS, NO_CASTS, QUOTE_ONLY_WHEN_REQUIRED, REPLACE_LOBS_FOR_TRACE, TRACE_SQL_FLAGS

Constructor Summary

Constructors

Constructor	Description
FileFunction(Expression arg1, Expression arg2, int function)

Method Summary

Modifier and Type	Method	Description
java.lang.String	getName()	Get the name.
Value	getValue(SessionLocal session)	Return the resulting value for the current row.
boolean	isEverything(ExpressionVisitor visitor)	Check if this expression and all sub-expressions can fulfill a criteria.
Expression	optimize(SessionLocal session)	Try to optimize the expression.

Methods inherited from class org.h2.expression.function.Function1_2

getUnenclosedSQL, getValue

Methods inherited from class org.h2.expression.Operation1_2

getCost, getSubexpression, getSubexpressionCount, getType, mapColumns, setEvaluatable, updateAggregate

Methods inherited from class org.h2.expression.Expression

addFilterConditions, createIndexConditions, getAlias, getBooleanValue, getColumnName, getColumnNameForView, getEnclosedSQL, getNonAliasExpression, getNotIfPossible, getNullable, getSchemaName, getSQL, getSQL, getSQL, getSQL, getTableAlias, getTableName, getWhenSQL, getWhenValue, isConstant, isIdentity, isNullConstant, isValueSet, isWhenConditionOperand, needParentheses, optimizeCondition, toString, writeExpressions, writeExpressions

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.h2.util.HasSQL

getTraceSQL

Field Detail

FILE_READ

public static final int FILE_READ

FILE_READ() (non-standard).

See Also:

Constant Field Values

FILE_WRITE

public static final int FILE_WRITE

FILE_WRITE() (non-standard).

See Also:

Constant Field Values

NAMES

private static final java.lang.String[] NAMES

function

private final int function

Constructor Detail

FileFunction

public FileFunction(Expression arg1,
                    Expression arg2,
                    int function)

Method Detail

getValue

public Value getValue(SessionLocal session)

Description copied from class: Expression

Return the resulting value for the current row.

Overrides:

getValue in class Function1_2

Parameters:

session - the session

Returns:

the result

optimize

public Expression optimize(SessionLocal session)

Description copied from class: Expression

Try to optimize the expression.

Specified by:

optimize in class Expression

Parameters:

session - the session

Returns:

the optimized expression

isEverything

public boolean isEverything(ExpressionVisitor visitor)

Description copied from class: Expression

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

Overrides:

isEverything in class Operation1_2

Parameters:

visitor - the visitor

Returns:

if the criteria can be fulfilled

getName

public java.lang.String getName()

Description copied from interface: NamedExpression

Get the name.

Returns:

the name in uppercase