#ifndef SQL_PARSER_INDEX_INCLUDED
#define SQL_PARSER_INDEX_INCLUDED


#include "string"
using std::string;

struct Field_Description{

 Item_field * field_name;
 Item_func::Functype operator_type;
 int cardinality;
 const char * field_print;

 Field_Description(Item_field * field, int card_value,Item_func::Functype type,const char * field_ptr){
	field_name = field;
	operator_type = type;
	cardinality = card_value;
	field_print = field_ptr;
 }

 Field_Description(Item_field * field){
	field_name = field;
	operator_type = Item_func::UNKNOWN_FUNC;
	cardinality = 0;
	field_print = NULL;
 }

};


struct INDEX_FIELD{
 Field_Description * index_field;

 INDEX_FIELD * next_field;

 INDEX_FIELD(Field_Description * field){
	index_field = field;
	next_field = NULL;
 }

};


struct JOIN_CONDITION{
 List<Item_field> join_fields;
 TABLE_LIST * join_table;

 JOIN_CONDITION(TABLE_LIST * table){
	join_table = table;
 }

 List<Item_field> * get_join_field(){
	if (join_fields.elements == 0){
	 join_fields.empty();
	}
	return &join_fields;
 }

};


struct POSSBILE_INDEX{
 string index_name;
 longlong cardinality;
 List<char> index_columns;

 POSSBILE_INDEX(char * indexname){

	index_name = string(indexname);
	cardinality = 0;
 }

 List<char> * get_index_columns(){
	if (index_columns.elements == 0){
	 index_columns.empty();
	}
	return &index_columns;
 }
};





#endif