org.h2.expression.function

Class FunctionN

java.lang.Object

org.h2.expression.Expression

org.h2.expression.OperationN

org.h2.expression.function.FunctionN

All Implemented Interfaces:

ExpressionWithVariableParameters, NamedExpression, HasSQL, Typed

Direct Known Subclasses:

ArrayFunction, CoalesceFunction, ConcatFunction, CryptFunction, CSVWriteFunction, DataTypeSQLFunction, DateTimeFormatFunction, DBObjectFunction, HashFunction, ModeFunction, RegexpFunction, StringFunction, SubstringFunction, ToCharFunction, TruncateValueFunction, XMLFunction

public abstract class FunctionN
extends OperationN
implements NamedExpression

Function with many arguments.

Field Summary

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

Modifier	Constructor and Description
protected	FunctionN(Expression[] args)

Method Summary

Modifier and Type	Method and Description
java.lang.StringBuilder	getUnenclosedSQL(java.lang.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, Value v3) Returns the value of this function.

Methods inherited from class org.h2.expression.OperationN

addParameter, doneWithParameters, getCost, getSubexpression, getSubexpressionCount, getType, 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, getWhenSQL, getWhenValue, isConstant, isIdentity, isNullConstant, isValueSet, isWhenConditionOperand, needParentheses, optimize, 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.expression.function.NamedExpression

getName

Methods inherited from interface org.h2.util.HasSQL

getTraceSQL

Constructor Detail

FunctionN

protected FunctionN(Expression[] args)

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

getValue

protected Value getValue(SessionLocal session,
                         Value v1,
                         Value v2,
                         Value v3)

Returns the value of this function.

Parameters:

session - the session

v1 - the value of first argument, or null

v2 - the value of second argument, or null

v3 - the value of third argument, or null

Returns:

the resulting value

getUnenclosedSQL

public java.lang.StringBuilder getUnenclosedSQL(java.lang.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