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MDEV-12770 Add Type_handler::decimal_precision() + MDEV-12769

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This patch for MDEV-12770 is also fixing:

MDEV-12769 Arithmetic operators with temporal types create excessive column types
This commit is contained in:
Alexander Barkov
2017-05-10 08:30:56 +04:00
parent 18ad176809
commit cd32f84214
9 changed files with 107 additions and 56 deletions
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14
sql/sql_type.h
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@ -639,6 +639,7 @@ public:
virtual uint Item_time_precision(Item *item) const;
virtual uint Item_datetime_precision(Item *item) const;
virtual uint Item_decimal_scale(const Item *item) const;
virtual uint Item_decimal_precision(const Item *item) const= 0;
/*
Returns how many digits a divisor adds into a division result.
See Item::divisor_precision_increment() in item.h for more comments.
@ -935,6 +936,11 @@ public:
DBUG_ASSERT(0);
return 0;
}
uint Item_decimal_precision(const Item *item) const
{
DBUG_ASSERT(0);
return DECIMAL_MAX_PRECISION;
}
bool Item_save_in_value(Item *item, st_value *value) const;
bool Item_send(Item *item, Protocol *protocol, st_value *buf) const
{
@ -1156,6 +1162,7 @@ public:
void sortlength(THD *thd,
const Type_std_attributes *item,
SORT_FIELD_ATTR *attr) const;
uint Item_decimal_precision(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 *make_const_item_for_comparison(THD *, Item *src, const Item *cmp) const;
@ -1217,6 +1224,7 @@ public:
const Type_std_attributes *item,
SORT_FIELD_ATTR *attr) const;
uint32 max_display_length(const Item *item) const;
uint Item_decimal_precision(const Item *item) const;
bool Item_save_in_value(Item *item, st_value *value) const;
bool Item_send(Item *item, Protocol *protocol, st_value *buf) const
{
@ -1278,6 +1286,7 @@ public:
void sortlength(THD *thd,
const Type_std_attributes *item,
SORT_FIELD_ATTR *attr) const;
uint Item_decimal_precision(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 *make_const_item_for_comparison(THD *, Item *src, const Item *cmp) const;
@ -1408,6 +1417,7 @@ public:
{
return Item_temporal_precision(item, false);
}
uint Item_decimal_precision(const Item *item) const;
bool Item_save_in_value(Item *item, st_value *value) const;
bool Item_send(Item *item, Protocol *protocol, st_value *buf) const
{
@ -1703,6 +1713,7 @@ public:
{
return Item_decimal_scale_with_seconds(item);
}
uint Item_decimal_precision(const Item *item) const;
uint Item_divisor_precision_increment(const Item *item) const
{
return Item_divisor_precision_increment_with_seconds(item);
@ -1780,6 +1791,7 @@ public:
{
return MYSQL_TIMESTAMP_DATE;
}
uint Item_decimal_precision(const Item *item) const;
String *print_item_value(THD *thd, Item *item, String *str) const;
bool Item_hybrid_func_fix_attributes(THD *thd, Item_hybrid_func *func,
Item **items, uint nitems) const;
@ -1828,6 +1840,7 @@ public:
{
return Item_decimal_scale_with_seconds(item);
}
uint Item_decimal_precision(const Item *item) const;
uint Item_divisor_precision_increment(const Item *item) const
{
return Item_divisor_precision_increment_with_seconds(item);
@ -1889,6 +1902,7 @@ public:
{
return Item_decimal_scale_with_seconds(item);
}
uint Item_decimal_precision(const Item *item) const;
uint Item_divisor_precision_increment(const Item *item) const
{
return Item_divisor_precision_increment_with_seconds(item);