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java.lang.Objectorg.axiondb.BaseSelectable
org.axiondb.functions.BaseFunction
org.axiondb.functions.ConcatFunction
public class ConcatFunction
CONCAT(string [, string]*)
: concatenates one or more
strings
.
Evaluates to NULL
if any of the arguments are null
.
Field Summary |
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Fields inherited from class org.axiondb.BaseSelectable |
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_hash |
Constructor Summary | |
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ConcatFunction()
|
Method Summary | |
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java.lang.Object |
evaluate(RowDecorator row)
|
DataType |
getDataType()
StringType |
boolean |
isValid()
|
ConcreteFunction |
makeNewInstance()
|
Methods inherited from class org.axiondb.functions.BaseFunction |
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addArgument, getArgument, getArgumentCount, setArgument, setVariableContext, toString |
Methods inherited from class org.axiondb.BaseSelectable |
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getAlias, getLabel, getName, setAlias, setName |
Methods inherited from class java.lang.Object |
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clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait |
Methods inherited from interface org.axiondb.Function |
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addArgument, getAlias, getArgument, getArgumentCount, getName, setAlias, setArgument |
Methods inherited from interface org.axiondb.Selectable |
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getLabel, setVariableContext |
Constructor Detail |
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public ConcatFunction()
Method Detail |
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public ConcreteFunction makeNewInstance()
makeNewInstance
in interface FunctionFactory
public DataType getDataType()
StringType
getDataType
in interface Selectable
getDataType
in class BaseFunction
public java.lang.Object evaluate(RowDecorator row) throws AxionException
evaluate
in interface ScalarFunction
evaluate
in interface Selectable
AxionException
public boolean isValid()
isValid
in interface ConcreteFunction
isValid
in class BaseFunction
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