public class NvlFunction extends Object implements SQLFunction
Emulation of <tt>coalesce()</tt> on Oracle, using multiple <tt>nvl()</tt> calls
Constructor and Description |
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NvlFunction() |
Modifier and Type | Method and Description |
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Type |
getReturnType(Type argumentType,
Mapping mapping)
The return type of the function.
|
boolean |
hasArguments()
Does this function have any arguments?
|
boolean |
hasParenthesesIfNoArguments()
If there are no arguments, are parentheses required?
|
String |
render(Type argumentType,
List args,
SessionFactoryImplementor factory)
Render the function call as SQL fragment.
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public boolean hasArguments()
SQLFunction
Does this function have any arguments?
hasArguments
in interface SQLFunction
public boolean hasParenthesesIfNoArguments()
SQLFunction
If there are no arguments, are parentheses required?
hasParenthesesIfNoArguments
in interface SQLFunction
public Type getReturnType(Type argumentType, Mapping mapping) throws QueryException
SQLFunction
The return type of the function. May be either a concrete type which is preset, or variable depending upon
the type of the first function argument.
<p/>
Note, the 'firstArgumentType' parameter should match the one passed into SQLFunction.render(org.hibernate.type.Type, java.util.List, org.hibernate.engine.spi.SessionFactoryImplementor)
getReturnType
in interface SQLFunction
argumentType
- The type of the first argumentmapping
- The mapping source.QueryException
- Indicates an issue resolving the return type.public String render(Type argumentType, List args, SessionFactoryImplementor factory) throws QueryException
SQLFunction
Render the function call as SQL fragment.
<p/>
Note, the 'firstArgumentType' parameter should match the one passed into SQLFunction.getReturnType(org.hibernate.type.Type, org.hibernate.engine.spi.Mapping)
render
in interface SQLFunction
argumentType
- The type of the first argumentargs
- The function argumentsfactory
- The SessionFactoryQueryException
- Indicates a problem rendering the
function call.Copyright © 2001-2018 Red Hat, Inc. All Rights Reserved.