Package org.h2.expression.function

Class GCDFunction

java.lang.Object

org.h2.expression.Expression

org.h2.expression.OperationN

org.h2.expression.function.FunctionN

org.h2.expression.function.GCDFunction

All Implemented Interfaces:

ExpressionWithVariableParameters, NamedExpression, HasSQL, Typed

public class GCDFunction
extends FunctionN

GCD and LCM functions.

Field Summary

Fields

Modifier and Type	Field	Description
static final int	GCD	GCD() (non-standard).
static final int	LCM	LCM() (non-standard).
static final int	MAX_BIT_LENGTH

Fields inherited from class org.h2.expression.OperationN

args, argsCount, 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
GCDFunction(int function)

Method Summary

Modifier and Type	Method	Description
static boolean	checkType(Expression e, String name)	Checks type of GCD, LCM, GCD_AGG, or LCM_AGG argument.
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.FunctionN

getUnenclosedSQL, getValue

Methods inherited from class org.h2.expression.OperationN

addParameter, doneWithParameters, getCost, getSubexpression, getSubexpressionCount, getType, inlineSubexpressions, isEverything, mapColumns, optimizeArguments, 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, getTypeIfStaticallyKnown, 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 Details

GCD

public static final int GCD

GCD() (non-standard).

See Also:

• Constant Field Values

LCM

public static final int LCM

LCM() (non-standard).

See Also:

• Constant Field Values

MAX_BIT_LENGTH

public static final int MAX_BIT_LENGTH

Constructor Details

GCDFunction

public GCDFunction(int function)

Method Details

getValue

public Value getValue(SessionLocal session)

Description copied from class: Expression

Return the resulting value for the current row.

Overrides:

getValue in class FunctionN

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

checkType

public static boolean checkType(Expression e,
 String name)

Checks type of GCD, LCM, GCD_AGG, or LCM_AGG argument.

Parameters:

e - the argument

name - the name of the function

Returns:

true if argument has NULL data type, false otherwise

getName

public String getName()

Description copied from interface: NamedExpression

Get the name.

Returns:

the name in uppercase