diff options
Diffstat (limited to 'sql/item.h')
| -rw-r--r-- | sql/item.h | 145 |
1 files changed, 106 insertions, 39 deletions
diff --git a/sql/item.h b/sql/item.h index e872335bb77..19b7b5d03e9 100644 --- a/sql/item.h +++ b/sql/item.h @@ -2392,7 +2392,7 @@ public: if (join_tab_idx_arg < join_tab_idx) join_tab_idx= join_tab_idx_arg; } - virtual uint get_join_tab_idx() { return join_tab_idx; } + uint get_join_tab_idx() const { return join_tab_idx; } table_map view_used_tables(TABLE_LIST *view) { @@ -4820,29 +4820,20 @@ public: class Item_temporal_literal :public Item_literal { -protected: - MYSQL_TIME cached_time; public: - /** - Constructor for Item_date_literal. - @param ltime DATE value. - */ - Item_temporal_literal(THD *thd, const MYSQL_TIME *ltime) + Item_temporal_literal(THD *thd) :Item_literal(thd) { collation= DTCollation_numeric(); decimals= 0; - cached_time= *ltime; } - Item_temporal_literal(THD *thd, const MYSQL_TIME *ltime, uint dec_arg): + Item_temporal_literal(THD *thd, uint dec_arg): Item_literal(thd) { collation= DTCollation_numeric(); decimals= dec_arg; - cached_time= *ltime; } - const MYSQL_TIME *const_ptr_mysql_time() const { return &cached_time; } int save_in_field(Field *field, bool no_conversions) { return save_date_in_field(field, no_conversions); } }; @@ -4853,27 +4844,62 @@ public: */ class Item_date_literal: public Item_temporal_literal { +protected: + Date cached_time; + bool update_null() + { + return maybe_null && + (null_value= cached_time.check_date_with_warn(current_thd)); + } public: - Item_date_literal(THD *thd, const MYSQL_TIME *ltime) - :Item_temporal_literal(thd, ltime) + Item_date_literal(THD *thd, const Date *ltime) + :Item_temporal_literal(thd), + cached_time(*ltime) { + DBUG_ASSERT(cached_time.is_valid_date()); max_length= MAX_DATE_WIDTH; /* If date has zero month or day, it can return NULL in case of NO_ZERO_DATE or NO_ZERO_IN_DATE. - We can't just check the current sql_mode here in constructor, + If date is `February 30`, it can return NULL in case if + no ALLOW_INVALID_DATES is set. + We can't set null_value using the current sql_mode here in constructor, because sql_mode can change in case of prepared statements between PREPARE and EXECUTE. + Here we only set maybe_null to true if the value has such anomalies. + Later (during execution time), if maybe_null is true, then the value + will be checked per row, according to the execution time sql_mode. + The check_date() below call should cover all cases mentioned. */ - maybe_null= !ltime->month || !ltime->day; + maybe_null= cached_time.check_date(TIME_NO_ZERO_DATE | TIME_NO_ZERO_IN_DATE); } const Type_handler *type_handler() const { return &type_handler_newdate; } void print(String *str, enum_query_type query_type); + const MYSQL_TIME *const_ptr_mysql_time() const + { + return cached_time.get_mysql_time(); + } Item *clone_item(THD *thd); - longlong val_int() { return Date(this).to_longlong(); } - double val_real() { return Date(this).to_double(); } - String *val_str(String *to) { return Date(this).to_string(to); } - my_decimal *val_decimal(my_decimal *to) { return Date(this).to_decimal(to); } + longlong val_int() + { + return update_null() ? 0 : cached_time.to_longlong(); + } + double val_real() + { + return update_null() ? 0 : cached_time.to_double(); + } + String *val_str(String *to) + { + return update_null() ? 0 : cached_time.to_string(to); + } + my_decimal *val_decimal(my_decimal *to) + { + return update_null() ? 0 : cached_time.to_decimal(to); + } + longlong val_datetime_packed(THD *thd) + { + return update_null() ? 0 : cached_time.valid_date_to_packed(); + } bool get_date(THD *thd, MYSQL_TIME *res, date_mode_t fuzzydate); Item *get_copy(THD *thd) { return get_item_copy<Item_date_literal>(thd, this); } @@ -4885,19 +4911,31 @@ public: */ class Item_time_literal: public Item_temporal_literal { +protected: + Time cached_time; public: - Item_time_literal(THD *thd, const MYSQL_TIME *ltime, uint dec_arg): - Item_temporal_literal(thd, ltime, dec_arg) + Item_time_literal(THD *thd, const Time *ltime, uint dec_arg): + Item_temporal_literal(thd, dec_arg), + cached_time(*ltime) { + DBUG_ASSERT(cached_time.is_valid_time()); max_length= MIN_TIME_WIDTH + (decimals ? decimals + 1 : 0); } const Type_handler *type_handler() const { return &type_handler_time2; } void print(String *str, enum_query_type query_type); + const MYSQL_TIME *const_ptr_mysql_time() const + { + return cached_time.get_mysql_time(); + } Item *clone_item(THD *thd); - longlong val_int() { return Time(this).to_longlong(); } - double val_real() { return Time(this).to_double(); } - String *val_str(String *to) { return Time(this).to_string(to, decimals); } - my_decimal *val_decimal(my_decimal *to) { return Time(this).to_decimal(to); } + longlong val_int() { return cached_time.to_longlong(); } + double val_real() { return cached_time.to_double(); } + String *val_str(String *to) { return cached_time.to_string(to, decimals); } + my_decimal *val_decimal(my_decimal *to) { return cached_time.to_decimal(to); } + longlong val_time_packed(THD *thd) + { + return cached_time.valid_time_to_packed(); + } bool get_date(THD *thd, MYSQL_TIME *res, date_mode_t fuzzydate); bool val_native(THD *thd, Native *to) { @@ -4913,26 +4951,49 @@ public: */ class Item_datetime_literal: public Item_temporal_literal { +protected: + Datetime cached_time; + bool update_null() + { + return maybe_null && + (null_value= cached_time.check_date_with_warn(current_thd)); + } public: - Item_datetime_literal(THD *thd, const MYSQL_TIME *ltime, uint dec_arg): - Item_temporal_literal(thd, ltime, dec_arg) + Item_datetime_literal(THD *thd, const Datetime *ltime, uint dec_arg): + Item_temporal_literal(thd, dec_arg), + cached_time(*ltime) { + DBUG_ASSERT(cached_time.is_valid_datetime()); max_length= MAX_DATETIME_WIDTH + (decimals ? decimals + 1 : 0); // See the comment on maybe_null in Item_date_literal - maybe_null= !ltime->month || !ltime->day; + maybe_null= cached_time.check_date(TIME_NO_ZERO_DATE | TIME_NO_ZERO_IN_DATE); } const Type_handler *type_handler() const { return &type_handler_datetime2; } void print(String *str, enum_query_type query_type); + const MYSQL_TIME *const_ptr_mysql_time() const + { + return cached_time.get_mysql_time(); + } Item *clone_item(THD *thd); - longlong val_int() { return Datetime(this).to_longlong(); } - double val_real() { return Datetime(this).to_double(); } + longlong val_int() + { + return update_null() ? 0 : cached_time.to_longlong(); + } + double val_real() + { + return update_null() ? 0 : cached_time.to_double(); + } String *val_str(String *to) { - return Datetime(this).to_string(to, decimals); + return update_null() ? NULL : cached_time.to_string(to, decimals); } my_decimal *val_decimal(my_decimal *to) { - return Datetime(this).to_decimal(to); + return update_null() ? NULL : cached_time.to_decimal(to); + } + longlong val_datetime_packed(THD *thd) + { + return update_null() ? 0 : cached_time.valid_datetime_to_packed(); } bool get_date(THD *thd, MYSQL_TIME *res, date_mode_t fuzzydate); Item *get_copy(THD *thd) @@ -4969,11 +5030,14 @@ class Item_date_literal_for_invalid_dates: public Item_date_literal in sql_mode=TRADITIONAL. */ public: - Item_date_literal_for_invalid_dates(THD *thd, const MYSQL_TIME *ltime) - :Item_date_literal(thd, ltime) { } + Item_date_literal_for_invalid_dates(THD *thd, const Date *ltime) + :Item_date_literal(thd, ltime) + { + maybe_null= false; + } bool get_date(THD *thd, MYSQL_TIME *ltime, date_mode_t fuzzydate) { - *ltime= cached_time; + cached_time.copy_to_mysql_time(ltime); return (null_value= false); } }; @@ -4987,11 +5051,14 @@ class Item_datetime_literal_for_invalid_dates: public Item_datetime_literal { public: Item_datetime_literal_for_invalid_dates(THD *thd, - const MYSQL_TIME *ltime, uint dec_arg) - :Item_datetime_literal(thd, ltime, dec_arg) { } + const Datetime *ltime, uint dec_arg) + :Item_datetime_literal(thd, ltime, dec_arg) + { + maybe_null= false; + } bool get_date(THD *thd, MYSQL_TIME *ltime, date_mode_t fuzzydate) { - *ltime= cached_time; + cached_time.copy_to_mysql_time(ltime); return (null_value= false); } }; |