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@ -505,6 +505,45 @@ public: |
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}; |
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/** |
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Abstract class for functions returning TIME, DATE, DATETIME or string values, |
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whose data type depends on parameters and is set at fix_fields time. |
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*/ |
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class Item_temporal_hybrid_func: public Item_temporal_func |
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{ |
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protected: |
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enum_field_types cached_field_type; // TIME, DATE, DATETIME or STRING |
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String ascii_buf; // Conversion buffer |
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public: |
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Item_temporal_hybrid_func(Item *a,Item *b) |
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:Item_temporal_func(a,b) {} |
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enum_field_types field_type() const { return cached_field_type; } |
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const CHARSET_INFO *charset_for_protocol() const |
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{ |
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/* |
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Can return TIME, DATE, DATETIME or VARCHAR depending on arguments. |
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Send using "binary" when TIME, DATE or DATETIME, |
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or using collation.collation when VARCHAR |
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(which is fixed from @@collation_connection in fix_length_and_dec). |
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*/ |
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DBUG_ASSERT(fixed == 1); |
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return cached_field_type == MYSQL_TYPE_STRING ? |
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collation.collation : &my_charset_bin; |
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} |
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/** |
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Return string value in ASCII character set. |
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*/ |
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String *val_str_ascii(String *str); |
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/** |
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Return string value in @@character_set_connection. |
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*/ |
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String *val_str(String *str) |
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{ |
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return val_str_from_val_str_ascii(str, &ascii_buf); |
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} |
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}; |
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class Item_datefunc :public Item_temporal_func |
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{ |
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public: |
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@ -761,17 +800,15 @@ public: |
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}; |
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class Item_date_add_interval :public Item_temporal_func |
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class Item_date_add_interval :public Item_temporal_hybrid_func |
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{ |
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enum_field_types cached_field_type; |
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public: |
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const interval_type int_type; // keep it public |
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const bool date_sub_interval; // keep it public |
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Item_date_add_interval(Item *a,Item *b,interval_type type_arg,bool neg_arg) |
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:Item_temporal_func(a,b),int_type(type_arg), date_sub_interval(neg_arg) {} |
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:Item_temporal_hybrid_func(a,b),int_type(type_arg), date_sub_interval(neg_arg) {} |
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const char *func_name() const { return "date_add_interval"; } |
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void fix_length_and_dec(); |
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enum_field_types field_type() const { return cached_field_type; } |
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bool get_date(MYSQL_TIME *res, ulonglong fuzzy_date); |
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bool eq(const Item *item, bool binary_cmp) const; |
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void print(String *str, enum_query_type query_type); |
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@ -909,16 +946,14 @@ public: |
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}; |
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class Item_func_add_time :public Item_temporal_func |
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class Item_func_add_time :public Item_temporal_hybrid_func |
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{ |
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const bool is_date; |
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int sign; |
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enum_field_types cached_field_type; |
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public: |
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Item_func_add_time(Item *a, Item *b, bool type_arg, bool neg_arg) |
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:Item_temporal_func(a, b), is_date(type_arg) { sign= neg_arg ? -1 : 1; } |
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enum_field_types field_type() const { return cached_field_type; } |
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:Item_temporal_hybrid_func(a, b), is_date(type_arg) { sign= neg_arg ? -1 : 1; } |
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void fix_length_and_dec(); |
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bool get_date(MYSQL_TIME *ltime, ulonglong fuzzy_date); |
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void print(String *str, enum_query_type query_type); |
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@ -1011,18 +1046,16 @@ public: |
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}; |
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class Item_func_str_to_date :public Item_temporal_func |
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class Item_func_str_to_date :public Item_temporal_hybrid_func |
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{ |
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enum_field_types cached_field_type; |
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timestamp_type cached_timestamp_type; |
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bool const_item; |
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public: |
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Item_func_str_to_date(Item *a, Item *b) |
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:Item_temporal_func(a, b), const_item(false) |
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:Item_temporal_hybrid_func(a, b), const_item(false) |
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{} |
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bool get_date(MYSQL_TIME *ltime, ulonglong fuzzy_date); |
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const char *func_name() const { return "str_to_date"; } |
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enum_field_types field_type() const { return cached_field_type; } |
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void fix_length_and_dec(); |
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}; |
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Alexander Barkov
12 years ago