Package org.h2.expression.function

Class LengthFunction

java.lang.Object

org.h2.expression.Expression

org.h2.expression.Operation1

org.h2.expression.function.Function1

org.h2.expression.function.LengthFunction

All Implemented Interfaces:

NamedExpression, HasSQL, Typed

public final class LengthFunction
extends Function1

CHAR_LENGTH(), or OCTET_LENGTH() function.

Field Summary

Fields

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

Fields inherited from class org.h2.expression.Operation1

arg, 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
LengthFunction(Expression arg, 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.
Expression	optimize(SessionLocal session)	Try to optimize the expression.

Methods inherited from class org.h2.expression.function.Function1

getUnenclosedSQL

Methods inherited from class org.h2.expression.Operation1

getCost, getSubexpression, getSubexpressionCount, getType, isEverything, 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

CHAR_LENGTH

public static final int CHAR_LENGTH

CHAR_LENGTH().

See Also:

Constant Field Values

OCTET_LENGTH

public static final int OCTET_LENGTH

OCTET_LENGTH().

See Also:

Constant Field Values

BIT_LENGTH

public static final int BIT_LENGTH

BIT_LENGTH() (non-standard).

See Also:

Constant Field Values

NAMES

private static final java.lang.String[] NAMES

function

private final int function

Constructor Detail

LengthFunction

public LengthFunction(Expression arg,
                      int function)

Method Detail

getValue

public Value getValue(SessionLocal session)

Description copied from class: Expression

Return the resulting value for the current row.

Specified by:

getValue in class Expression

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

getName

public java.lang.String getName()

Description copied from interface: NamedExpression

Get the name.

Returns:

the name in uppercase