Class TrimFunction

java.lang.Object

org.h2.expression.Expression

org.h2.expression.Operation1_2

org.h2.expression.function.Function1_2

org.h2.expression.function.TrimFunction

All Implemented Interfaces:

NamedExpression, HasSQL, Typed

public final class TrimFunction
extends Function1_2

A TRIM function.

Field Summary

Fields

Modifier and Type	Field	Description
private int	flags
static final int	LEADING	The LEADING flag.
static final int	TRAILING	The TRAILING flag.

Fields inherited from class Operation1_2

left, right, type

Fields inherited from class Expression

AUTO_PARENTHESES, MAP_IN_AGGREGATE, MAP_IN_WINDOW, MAP_INITIAL, WITH_PARENTHESES, WITHOUT_PARENTHESES

Fields inherited from interface 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
TrimFunction(Expression from, Expression space, int flags)

Method Summary

Modifier and Type	Method	Description
String	getName()	Get the name.
StringBuilder	getUnenclosedSQL(StringBuilder builder, int sqlFlags)	Get the SQL statement of this expression.
Value	getValue(SessionLocal session, Value v1, Value v2)	Returns the value of this function.
Expression	optimize(SessionLocal session)	Try to optimize the expression.

Methods inherited from class Function1_2

getValue

Methods inherited from class Operation1_2

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

Methods inherited from class 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 Object

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

Methods inherited from interface HasSQL

getTraceSQL

Field Details

LEADING

public static final int LEADING

The LEADING flag.

See Also:

• Constant Field Values

TRAILING

public static final int TRAILING

The TRAILING flag.

See Also:

• Constant Field Values

flags

private int flags

Constructor Details

TrimFunction

public TrimFunction(Expression from,
 Expression space,
 int flags)

Method Details

getValue

public Value getValue(SessionLocal session,
 Value v1,
 Value v2)

Description copied from class: Function1_2

Returns the value of this function.

Overrides:

getValue in class Function1_2

Parameters:

session - the session

v1 - the value of first argument

v2 - the value of second argument, or null

Returns:

the resulting value

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

getUnenclosedSQL

public StringBuilder getUnenclosedSQL(StringBuilder builder,
 int sqlFlags)

Description copied from class: Expression

Get the SQL statement of this expression. This may not always be the original SQL statement, especially after optimization. Enclosing '(' and ')' are never appended.

Overrides:

getUnenclosedSQL in class Function1_2

Parameters:

builder - string builder

sqlFlags - formatting flags

Returns:

the specified string builder

getName

public String getName()

Description copied from interface: NamedExpression

Get the name.

Returns:

the name in uppercase