diff options
Diffstat (limited to 'sql/field.h')
| -rw-r--r-- | sql/field.h | 81 |
1 files changed, 78 insertions, 3 deletions
diff --git a/sql/field.h b/sql/field.h index f22bab0409d..da78a7c7674 100644 --- a/sql/field.h +++ b/sql/field.h @@ -329,6 +329,46 @@ public: *null_ptr= ((*null_ptr & (uchar) ~null_bit) | (null_ptr[l_offset] & null_bit)); } + + bool has_insert_default_function() const + { + return unireg_check == TIMESTAMP_DN_FIELD || + unireg_check == TIMESTAMP_DNUN_FIELD; + } + + bool has_update_default_function() const + { + return unireg_check == TIMESTAMP_UN_FIELD || + unireg_check == TIMESTAMP_DNUN_FIELD; + } + + /* + Mark the field as having a value supplied by the client, thus it should + not be auto-updated. + */ + void set_has_explicit_value() + { + flags|= HAS_EXPLICIT_VALUE; + } + + virtual void set_explicit_default(Item *value); + + /** + Evaluates the @c INSERT default function and stores the result in the + field. If no such function exists for the column, or the function is not + valid for the column's data type, invoking this function has no effect. + */ + virtual int evaluate_insert_default_function() { return 0; } + + + /** + Evaluates the @c UPDATE default function, if one exists, and stores the + result in the record buffer. If no such function exists for the column, + or the function is not valid for the column's data type, invoking this + function has no effect. + */ + virtual int evaluate_update_default_function() { return 0; } + virtual bool binary() const { return 1; } virtual bool zero_pack() const { return 1; } virtual enum ha_base_keytype key_type() const { return HA_KEYTYPE_BINARY; } @@ -1239,12 +1279,26 @@ public: virtual int set_time(); virtual void set_default() { - if (table->timestamp_field == this && - unireg_check != TIMESTAMP_UN_FIELD) + if (has_insert_default_function()) set_time(); else Field::set_default(); } + virtual void set_explicit_default(Item *value); + virtual int evaluate_insert_default_function() + { + int res= 0; + if (has_insert_default_function()) + res= set_time(); + return res; + } + virtual int evaluate_update_default_function() + { + int res= 0; + if (has_update_default_function()) + res= set_time(); + return res; + } /* Get TIMESTAMP field value as seconds since begging of Unix Epoch */ virtual my_time_t get_timestamp(ulong *sec_part) const; virtual void store_TIME(my_time_t timestamp, ulong sec_part) @@ -1252,7 +1306,6 @@ public: int4store(ptr,timestamp); } bool get_date(MYSQL_TIME *ltime, ulonglong fuzzydate); - timestamp_auto_set_type get_auto_set_type() const; uchar *pack(uchar *to, const uchar *from, uint max_length __attribute__((unused))) { @@ -1503,6 +1556,28 @@ public: void sql_type(String &str) const; bool zero_pack() const { return 1; } bool get_date(MYSQL_TIME *ltime, ulonglong fuzzydate); + virtual int set_time(); + virtual void set_default() + { + if (has_insert_default_function()) + set_time(); + else + Field::set_default(); + } + virtual int evaluate_insert_default_function() + { + int res= 0; + if (has_insert_default_function()) + res= set_time(); + return res; + } + virtual int evaluate_update_default_function() + { + int res= 0; + if (has_update_default_function()) + res= set_time(); + return res; + } uchar *pack(uchar* to, const uchar *from, uint max_length __attribute__((unused))) { |