ConcatFunction

java.lang.Object
- org.h2.expression.Expression
- - org.h2.expression.OperationN
  - - org.h2.expression.function.FunctionN
    - - org.h2.expression.function.ConcatFunction

All Implemented Interfaces:

ExpressionWithVariableParameters, NamedExpression, HasSQL, Typed
```
public final class ConcatFunction
extends FunctionN
```
A CONCAT or CONCAT_WS function.

Field Summary

Fields
Modifier and Type Field Description

static int CONCAT
CONCAT() (non-standard).

static int CONCAT_WS
CONCAT_WS() (non-standard).
- 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

ConcatFunction(int function)

ConcatFunction(int function, Expression... args)

Method Summary

All Methods Instance Methods Concrete Methods
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.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 Detail
  - CONCAT
```
public static final int CONCAT
```
    CONCAT() (non-standard).
    
    See Also:
    
    Constant Field Values
  - CONCAT_WS
```
public static final int CONCAT_WS
```
    CONCAT_WS() (non-standard).
    
    See Also:
    
    Constant Field Values
- Constructor Detail
  - ConcatFunction
```
public ConcatFunction(int function)
```
  - ConcatFunction
```
public ConcatFunction(int function,
                      Expression... args)
```
- Method Detail
  - 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
  - getName
```
public java.lang.String getName()
```
    Description copied from interface: NamedExpression
    
    Get the name.
    
    Returns:
    
    the name in uppercase