Java Doc for FunctionCall.java in  » Database-DBMS » h2database » org » h2 » expression » Java Source Code / Java DocumentationJava Source Code and Java Documentation

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Java Source Code / Java Documentation » Database DBMS » h2database » org.h2.expression 
Source Cross Reference  Class Diagram Java Document (Java Doc) 


org.h2.expression.FunctionCall

All known Subclasses:   org.h2.expression.TableFunction,  org.h2.expression.Function,  org.h2.expression.JavaFunction,
FunctionCall
public interface FunctionCall (Code)
This interface is used by the built-in functions, as well as the user defined functions.




Method Summary
 Expression[]getArgs()
     Get the function arguments.
 StringgetName()
     Get the name of the function.
 intgetParameterCount()
     Get the number of parameters.
 StringgetSQL()
     Get the SQL snippet of the function (including arguments).
 intgetType()
     Get the data type.
 ValuegetValue(Session session)
     Calculate the result.
 ValueResultSetgetValueForColumnList(Session session, Expression[] nullArgs)
     Get an empty result set with the column names set.
 Expressionoptimize(Session session)
     Optimize the function if possible.



Method Detail
getArgs
Expression[] getArgs()(Code)
Get the function arguments. argument list


getName
String getName()(Code)
Get the name of the function. the name


getParameterCount
int getParameterCount() throws SQLException(Code)
Get the number of parameters. the number of parameters


getSQL
String getSQL()(Code)
Get the SQL snippet of the function (including arguments). the SQL snippet.


getType
int getType()(Code)
Get the data type. the data type


getValue
Value getValue(Session session) throws SQLException(Code)
Calculate the result.
Parameters:
  session - the session the result


getValueForColumnList
ValueResultSet getValueForColumnList(Session session, Expression[] nullArgs) throws SQLException(Code)
Get an empty result set with the column names set.
Parameters:
  session - the session
Parameters:
  nullArgs - the argument list (some arguments may be null) the empty result set


optimize
Expression optimize(Session session) throws SQLException(Code)
Optimize the function if possible.
Parameters:
  session - the session the optimized expression


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