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MDEV-12649 Add Type_handler::Item_save_in_value

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This commit is contained in:
Alexander Barkov
2017-04-30 22:50:37 +04:00
parent 7a19c59c00
commit c67971a8a3
4 changed files with 101 additions and 48 deletions
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2
sql/item.cc
View File

@ -3787,7 +3787,7 @@ bool Item_param::set_from_item(THD *thd, Item *item)
}
}
struct st_value tmp;
if (!item->store(&tmp, 0))
if (!item->save_in_value(&tmp))
{
unsigned_flag= item->unsigned_flag;
switch (item->cmp_type()) {

49
sql/item.h
View File

@ -676,54 +676,9 @@ public:
*/
virtual inline void quick_fix_field() { fixed= 1; }
bool store(struct st_value *value, ulonglong fuzzydate)
bool save_in_value(struct st_value *value)
{
switch (cmp_type()) {
case INT_RESULT:
{
value->m_type= unsigned_flag ? DYN_COL_UINT : DYN_COL_INT;
value->value.m_longlong= val_int();
break;
}
case REAL_RESULT:
{
value->m_type= DYN_COL_DOUBLE;
value->value.m_double= val_real();
break;
}
case DECIMAL_RESULT:
{
value->m_type= DYN_COL_DECIMAL;
my_decimal *dec= val_decimal(&value->m_decimal);
if (dec != &value->m_decimal && !null_value)
my_decimal2decimal(dec, &value->m_decimal);
break;
}
case STRING_RESULT:
{
value->m_type= DYN_COL_STRING;
String *str= val_str(&value->m_string);
if (str != &value->m_string && !null_value)
value->m_string.set(str->ptr(), str->length(), str->charset());
break;
}
case TIME_RESULT:
{
value->m_type= DYN_COL_DATETIME;
get_date(&value->value.m_time, fuzzydate);
break;
}
case ROW_RESULT:
DBUG_ASSERT(false);
null_value= true;
break;
}
if (null_value)
{
value->m_type= DYN_COL_NULL;
return true;
}
return false;
return type_handler()->Item_save_in_value(this, value);
}
/* Function returns 1 on overflow and -1 on fatal errors */

87
sql/sql_type.cc
View File

@ -3808,4 +3808,91 @@ Type_handler_olddecimal::type_handler_for_union(const Item *item) const
}
/***************************************************************************/
bool Type_handler::check_null(const Item *item, st_value *value) const
{
if (item->null_value)
{
value->m_type= DYN_COL_NULL;
return true;
}
return false;
}
bool Type_handler_null::
Item_save_in_value(Item *item, st_value *value) const
{
value->m_type= DYN_COL_NULL;
return true;
}
bool Type_handler_row::
Item_save_in_value(Item *item, st_value *value) const
{
DBUG_ASSERT(0);
value->m_type= DYN_COL_NULL;
return true;
}
bool Type_handler_int_result::
Item_save_in_value(Item *item, st_value *value) const
{
value->m_type= item->unsigned_flag ? DYN_COL_UINT : DYN_COL_INT;
value->value.m_longlong= item->val_int();
return check_null(item, value);
}
bool Type_handler_real_result::
Item_save_in_value(Item *item, st_value *value) const
{
value->m_type= DYN_COL_DOUBLE;
value->value.m_double= item->val_real();
return check_null(item, value);
}
bool Type_handler_decimal_result::
Item_save_in_value(Item *item, st_value *value) const
{
value->m_type= DYN_COL_DECIMAL;
my_decimal *dec= item->val_decimal(&value->m_decimal);
if (dec != &value->m_decimal && !item->null_value)
my_decimal2decimal(dec, &value->m_decimal);
return check_null(item, value);
}
bool Type_handler_string_result::
Item_save_in_value(Item *item, st_value *value) const
{
value->m_type= DYN_COL_STRING;
String *str= item->val_str(&value->m_string);
if (str != &value->m_string && !item->null_value)
value->m_string.set(str->ptr(), str->length(), str->charset());
return check_null(item, value);
}
bool Type_handler_temporal_with_date::
Item_save_in_value(Item *item, st_value *value) const
{
value->m_type= DYN_COL_DATETIME;
item->get_date(&value->value.m_time, sql_mode_for_dates(current_thd));
return check_null(item, value);
}
bool Type_handler_time_common::
Item_save_in_value(Item *item, st_value *value) const
{
value->m_type= DYN_COL_DATETIME;
item->get_time(&value->value.m_time);
return check_null(item, value);
}
/***************************************************************************/

11
sql/sql_type.h
View File

@ -63,6 +63,7 @@ class in_vector;
class Type_std_attributes;
class Sort_param;
class Arg_comparator;
struct st_value;
struct TABLE;
struct SORT_FIELD_ATTR;
@ -403,6 +404,7 @@ protected:
Item_func_or_sum_illegal_param(const char *name) const;
bool
Item_func_or_sum_illegal_param(const Item_func_or_sum *) const;
bool check_null(const Item *item, st_value *value) const;
public:
static const Type_handler *blob_type_handler(uint max_octet_length);
static const Type_handler *string_type_handler(uint max_octet_length);
@ -537,6 +539,7 @@ public:
SORT_FIELD_ATTR *attr) const= 0;
virtual uint32 max_display_length(const Item *item) const= 0;
virtual bool Item_save_in_value(Item *item, st_value *value) const= 0;
virtual int Item_save_in_field(Item *item, Field *field,
bool no_conversions) const= 0;
@ -752,6 +755,7 @@ public:
DBUG_ASSERT(0);
return 0;
}
bool Item_save_in_value(Item *item, st_value *value) const;
int Item_save_in_field(Item *item, Field *field, bool no_conversions) const
{
DBUG_ASSERT(0);
@ -960,6 +964,7 @@ public:
void sortlength(THD *thd,
const Type_std_attributes *item,
SORT_FIELD_ATTR *attr) const;
bool Item_save_in_value(Item *item, st_value *value) const;
int Item_save_in_field(Item *item, Field *field, bool no_conversions) const;
Item_cache *Item_get_cache(THD *thd, const Item *item) const;
bool set_comparator_func(Arg_comparator *cmp) const;
@ -1019,6 +1024,7 @@ public:
const Type_std_attributes *item,
SORT_FIELD_ATTR *attr) const;
uint32 max_display_length(const Item *item) const;
bool Item_save_in_value(Item *item, st_value *value) const;
int Item_save_in_field(Item *item, Field *field, bool no_conversions) const;
Item_cache *Item_get_cache(THD *thd, const Item *item) const;
bool set_comparator_func(Arg_comparator *cmp) const;
@ -1074,6 +1080,7 @@ public:
void sortlength(THD *thd,
const Type_std_attributes *item,
SORT_FIELD_ATTR *attr) const;
bool Item_save_in_value(Item *item, st_value *value) const;
int Item_save_in_field(Item *item, Field *field, bool no_conversions) const;
Item_cache *Item_get_cache(THD *thd, const Item *item) const;
bool set_comparator_func(Arg_comparator *cmp) const;
@ -1202,6 +1209,7 @@ public:
{
return Item_temporal_precision(item, false);
}
bool Item_save_in_value(Item *item, st_value *value) const;
int Item_save_in_field(Item *item, Field *field, bool no_conversions) const;
String *print_item_value(THD *thd, Item *item, String *str) const
{
@ -1459,6 +1467,7 @@ public:
return Item_divisor_precision_increment_with_seconds(item);
}
const Type_handler *type_handler_for_comparison() const;
bool Item_save_in_value(Item *item, st_value *value) const;
int Item_save_in_field(Item *item, Field *field, bool no_conversions) const;
String *print_item_value(THD *thd, Item *item, String *str) const;
bool Item_hybrid_func_fix_attributes(THD *thd, Item_hybrid_func *func,
@ -1500,6 +1509,7 @@ class Type_handler_temporal_with_date: public Type_handler_temporal_result
public:
virtual ~Type_handler_temporal_with_date() {}
const Type_handler *type_handler_for_comparison() const;
bool Item_save_in_value(Item *item, st_value *value) const;
int Item_save_in_field(Item *item, Field *field, bool no_conversions) const;
cmp_item *make_cmp_item(THD *thd, CHARSET_INFO *cs) const;
in_vector *make_in_vector(THD *, const Item_func_in *, uint nargs) const;
@ -1698,6 +1708,7 @@ public:
const Type_handler *type_handler_for_tmp_table(const Item *item) const;
const Type_handler *type_handler_for_union(const Item *) const;
uint32 max_display_length(const Item *item) const { return 0; }
bool Item_save_in_value(Item *item, st_value *value) const;
Field *make_conversion_table_field(TABLE *, uint metadata,
const Field *target) const;
Field *make_table_field(const LEX_CSTRING *name,