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- Committer: Monty Taylor
- Date: 2008-10-08 00:14:19 UTC
- mto: This revision was merged to the branch mainline in revision 491.
- Revision ID: monty@inaugust.com-20081008001419-tg3g62sm9e3yz9q4
Split out Item_int_func and Item_func from Item_func. (don't think too hard about the second one)
added
removed
drizzled/item_func.h
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}
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#endif
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class Item_func :public Item_result_field
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{
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protected:
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Item **args, *tmp_arg[2];
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/*
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Allowed numbers of columns in result (usually 1, which means scalar value)
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0 means get this number from first argument
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*/
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uint32_t allowed_arg_cols;
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public:
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uint32_t arg_count;
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table_map used_tables_cache, not_null_tables_cache;
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bool const_item_cache;
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enum Functype { UNKNOWN_FUNC,EQ_FUNC,EQUAL_FUNC,NE_FUNC,LT_FUNC,LE_FUNC,
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GE_FUNC,GT_FUNC,
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LIKE_FUNC,ISNULL_FUNC,ISNOTNULL_FUNC,
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COND_AND_FUNC, COND_OR_FUNC, COND_XOR_FUNC,
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BETWEEN, IN_FUNC, MULT_EQUAL_FUNC,
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INTERVAL_FUNC, ISNOTNULLTEST_FUNC,
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NOT_FUNC, NOT_ALL_FUNC,
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NOW_FUNC, TRIG_COND_FUNC,
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SUSERVAR_FUNC, GUSERVAR_FUNC, COLLATE_FUNC,
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EXTRACT_FUNC, CHAR_TYPECAST_FUNC, FUNC_SP,
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NEG_FUNC };
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enum optimize_type { OPTIMIZE_NONE,OPTIMIZE_KEY,OPTIMIZE_OP, OPTIMIZE_NULL,
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OPTIMIZE_EQUAL };
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enum Type type() const { return FUNC_ITEM; }
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virtual enum Functype functype() const { return UNKNOWN_FUNC; }
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Item_func(void):
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allowed_arg_cols(1), arg_count(0)
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{
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with_sum_func= 0;
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}
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Item_func(Item *a):
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allowed_arg_cols(1), arg_count(1)
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{
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args= tmp_arg;
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args[0]= a;
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with_sum_func= a->with_sum_func;
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}
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Item_func(Item *a,Item *b):
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allowed_arg_cols(1), arg_count(2)
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{
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args= tmp_arg;
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args[0]= a; args[1]= b;
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with_sum_func= a->with_sum_func || b->with_sum_func;
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}
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Item_func(Item *a,Item *b,Item *c):
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allowed_arg_cols(1)
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{
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arg_count= 0;
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if ((args= (Item**) sql_alloc(sizeof(Item*)*3)))
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{
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arg_count= 3;
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args[0]= a; args[1]= b; args[2]= c;
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with_sum_func= a->with_sum_func || b->with_sum_func || c->with_sum_func;
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}
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}
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Item_func(Item *a,Item *b,Item *c,Item *d):
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allowed_arg_cols(1)
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{
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arg_count= 0;
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if ((args= (Item**) sql_alloc(sizeof(Item*)*4)))
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{
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arg_count= 4;
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args[0]= a; args[1]= b; args[2]= c; args[3]= d;
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with_sum_func= a->with_sum_func || b->with_sum_func ||
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c->with_sum_func || d->with_sum_func;
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}
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}
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Item_func(Item *a,Item *b,Item *c,Item *d,Item* e):
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allowed_arg_cols(1)
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{
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arg_count= 5;
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if ((args= (Item**) sql_alloc(sizeof(Item*)*5)))
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{
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args[0]= a; args[1]= b; args[2]= c; args[3]= d; args[4]= e;
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with_sum_func= a->with_sum_func || b->with_sum_func ||
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c->with_sum_func || d->with_sum_func || e->with_sum_func ;
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}
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}
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Item_func(List<Item> &list);
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// Constructor used for Item_cond_and/or (see Item comment)
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Item_func(THD *thd, Item_func *item);
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bool fix_fields(THD *, Item **ref);
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void fix_after_pullout(st_select_lex *new_parent, Item **ref);
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table_map used_tables() const;
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table_map not_null_tables() const;
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void update_used_tables();
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bool eq(const Item *item, bool binary_cmp) const;
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virtual optimize_type select_optimize() const { return OPTIMIZE_NONE; }
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virtual bool have_rev_func() const { return 0; }
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virtual Item *key_item() const { return args[0]; }
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/*
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This method is used for debug purposes to print the name of an
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item to the debug log. The second use of this method is as
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a helper function of print(), where it is applicable.
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To suit both goals it should return a meaningful,
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distinguishable and sintactically correct string. This method
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should not be used for runtime type identification, use enum
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{Sum}Functype and Item_func::functype()/Item_sum::sum_func()
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instead.
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*/
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virtual const char *func_name() const { return NULL; };
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virtual bool const_item() const { return const_item_cache; }
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inline Item **arguments() const { return args; }
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void set_arguments(List<Item> &list);
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inline uint32_t argument_count() const { return arg_count; }
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inline void remove_arguments() { arg_count=0; }
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void split_sum_func(THD *thd, Item **ref_pointer_array, List<Item> &fields);
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virtual void print(String *str, enum_query_type query_type);
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void print_op(String *str, enum_query_type query_type);
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void print_args(String *str, uint32_t from, enum_query_type query_type);
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virtual void fix_num_length_and_dec();
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void count_only_length();
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void count_real_length();
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void count_decimal_length();
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inline bool get_arg0_date(DRIZZLE_TIME *ltime, uint32_t fuzzy_date)
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{
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return (null_value=args[0]->get_date(ltime, fuzzy_date));
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}
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inline bool get_arg0_time(DRIZZLE_TIME *ltime)
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{
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return (null_value=args[0]->get_time(ltime));
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}
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bool is_null() {
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update_null_value();
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return null_value;
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}
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void signal_divide_by_null();
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Field *tmp_table_field() { return result_field; }
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Field *tmp_table_field(Table *t_arg);
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Item *get_tmp_table_item(THD *thd);
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my_decimal *val_decimal(my_decimal *);
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bool agg_arg_collations(DTCollation &c, Item **items, uint32_t nitems,
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uint32_t flags)
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{
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return agg_item_collations(c, func_name(), items, nitems, flags, 1);
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}
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bool agg_arg_collations_for_comparison(DTCollation &c,
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Item **items, uint32_t nitems,
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uint32_t flags)
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{
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return agg_item_collations_for_comparison(c, func_name(),
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items, nitems, flags);
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}
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bool agg_arg_charsets(DTCollation &c, Item **items, uint32_t nitems,
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uint32_t flags, int item_sep)
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{
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return agg_item_charsets(c, func_name(), items, nitems, flags, item_sep);
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}
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bool walk(Item_processor processor, bool walk_subquery, unsigned char *arg);
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Item *transform(Item_transformer transformer, unsigned char *arg);
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Item* compile(Item_analyzer analyzer, unsigned char **arg_p,
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Item_transformer transformer, unsigned char *arg_t);
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void traverse_cond(Cond_traverser traverser,
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void * arg, traverse_order order);
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inline double fix_result(double value)
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{
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if (CMATH_C99_NAMESPACE isfinite(value))
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return value;
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null_value=1;
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return 0.0;
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}
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};
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#include <drizzled/functions/func.h>
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#include <drizzled/functions/int.h>
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class Item_real_func :public Item_func
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{
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};
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class Item_int_func :public Item_func
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{
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public:
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Item_int_func() :Item_func() { max_length= 21; }
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Item_int_func(Item *a) :Item_func(a) { max_length= 21; }
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Item_int_func(Item *a,Item *b) :Item_func(a,b) { max_length= 21; }
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Item_int_func(Item *a,Item *b,Item *c) :Item_func(a,b,c)
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{ max_length= 21; }
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Item_int_func(List<Item> &list) :Item_func(list) { max_length= 21; }
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Item_int_func(THD *thd, Item_int_func *item) :Item_func(thd, item) {}
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double val_real();
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String *val_str(String*str);
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enum Item_result result_type () const { return INT_RESULT; }
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void fix_length_and_dec() {}
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};
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#include <drizzled/functions/int.h>
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class Item_func_connection_id :public Item_int_func
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{
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