Class Function2

java.lang.Object

org.h2.expression.Expression

org.h2.expression.Operation2

org.h2.expression.function.Function2

All Implemented Interfaces:

NamedExpression, HasSQL, Typed

Direct Known Subclasses:

MathFunction2, NullIfFunction, SetFunction, SignalFunction, StringFunction2

public abstract class Function2
extends Operation2
implements NamedExpression

Function with two arguments.

Field Summary

Fields inherited from class Operation2

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

Modifier	Constructor	Description
protected	Function2(Expression left, Expression right)

Method Summary

Modifier and Type	Method	Description
StringBuilder	getUnenclosedSQL(StringBuilder builder, int sqlFlags)	Get the SQL statement of this expression.
Value	getValue(SessionLocal session)	Return the resulting value for the current row.
protected Value	getValue(SessionLocal session, Value v1, Value v2)	Returns the value of this function.

Methods inherited from class Operation2

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, optimize, 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

Methods inherited from interface NamedExpression

getName

Constructor Details

Function2

protected Function2(Expression left,
 Expression right)

Method Details

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

getValue

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

Returns the value of this function.

Parameters:

session - the session

v1 - the value of first argument

v2 - the value of second argument

Returns:

the resulting value

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.

Specified by:

getUnenclosedSQL in class Expression

Parameters:

builder - string builder

sqlFlags - formatting flags

Returns:

the specified string builder