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drizzled/plugin/function.h
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#define DRIZZLED_PLUGIN_FUNCTION_H
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#include <drizzled/item.h>
 
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#include <drizzled/sql_list.h>
 
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#include <drizzled/item/bin_string.h>
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#include "drizzled/plugin/plugin.h"
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#include "drizzled/item/func.h"
 
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#include "drizzled/function/func.h"
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#include <string>
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#include <vector>
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#include <functional>
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namespace drizzled
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{
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class Item_func;
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namespace memory
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{
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  class Root;
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}
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namespace plugin
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{
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 */
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class Function
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  : public Plugin,
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    public std::unary_function<memory::Root*, Item_func *>
 
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    public std::unary_function<MEM_ROOT*, Item_func *>
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{
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  Function();
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  Function(const Function &);
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public:
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  Function(std::string in_name)
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   : Plugin(in_name, "Function"),
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     std::unary_function<memory::Root*, Item_func *>()
 
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     std::unary_function<MEM_ROOT*, Item_func *>()
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  { }
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  virtual result_type operator()(argument_type root) const= 0;
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  virtual ~Function() {}
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   */
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  static const plugin::Function *get(const char *name, size_t len=0);
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  typedef boost::unordered_map<std::string, const plugin::Function *, util::insensitive_hash, util::insensitive_equal_to> UdfMap;
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  static const UdfMap &getMap();
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};
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template<class T>