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MDEV-19612 Split ALTER related data type specific code in sql_table.cc to Type_handler

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This commit is contained in:
Alexander Barkov
2019-05-28 15:50:11 +04:00
parent d1d6fe9abf
commit f021317ae1
7 changed files with 173 additions and 32 deletions
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22
sql/sql_type.h
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@ -3207,6 +3207,7 @@ public:
virtual const Name name() const= 0;
virtual const Name version() const { return m_version_default; }
virtual const Name &default_value() const= 0;
virtual enum_field_types field_type() const= 0;
virtual enum_field_types real_field_type() const { return field_type(); }
/**
@ -3395,6 +3396,10 @@ public:
{
return false;
}
// Check if the implicit default value is Ok in the current sql_mode
virtual bool validate_implicit_default_value(THD *thd,
const Column_definition &def)
const;
// Automatic upgrade, e.g. for ALTER TABLE t1 FORCE
virtual void Column_definition_implicit_upgrade(Column_definition *c) const
{ }
@ -3758,6 +3763,13 @@ class Type_handler_row: public Type_handler
public:
virtual ~Type_handler_row() {}
const Name name() const { return m_name_row; }
const Name &default_value() const;
bool validate_implicit_default_value(THD *thd,
const Column_definition &def) const
{
DBUG_ASSERT(0);
return true;
}
bool is_scalar_type() const { return false; }
bool can_return_int() const { return false; }
bool can_return_decimal() const { return false; }
@ -4111,6 +4123,7 @@ protected:
const Type_handler *handler)
const;
public:
const Name &default_value() const;
String *print_item_value(THD *thd, Item *item, String *str) const;
double Item_func_min_max_val_real(Item_func_min_max *) const;
longlong Item_func_min_max_val_int(Item_func_min_max *) const;
@ -4612,6 +4625,7 @@ class Type_handler_string_result: public Type_handler
{
uint Item_temporal_precision(THD *thd, Item *item, bool is_time) const;
public:
const Name &default_value() const;
protocol_send_type_t protocol_send_type() const
{
return PROTOCOL_SEND_STRING;
@ -5244,6 +5258,7 @@ class Type_handler_time_common: public Type_handler_temporal_result
public:
virtual ~Type_handler_time_common() { }
const Name name() const { return m_name_time; }
const Name &default_value() const;
enum_field_types field_type() const { return MYSQL_TYPE_TIME; }
protocol_send_type_t protocol_send_type() const
{
@ -5408,6 +5423,7 @@ class Type_handler_date_common: public Type_handler_temporal_with_date
public:
virtual ~Type_handler_date_common() {}
const Name name() const { return m_name_date; }
const Name &default_value() const;
const Type_handler *type_handler_for_comparison() const;
enum_field_types field_type() const { return MYSQL_TYPE_DATE; }
protocol_send_type_t protocol_send_type() const
@ -5430,6 +5446,8 @@ public:
CHARSET_INFO *cs, bool send_error) const;
Item *create_typecast_item(THD *thd, Item *item,
const Type_cast_attributes &attr) const;
bool validate_implicit_default_value(THD *thd,
const Column_definition &def) const;
bool Column_definition_fix_attributes(Column_definition *c) const;
uint Item_decimal_precision(const Item *item) const;
String *print_item_value(THD *thd, Item *item, String *str) const;
@ -5505,6 +5523,7 @@ class Type_handler_datetime_common: public Type_handler_temporal_with_date
public:
virtual ~Type_handler_datetime_common() {}
const Name name() const { return m_name_datetime; }
const Name &default_value() const;
const Type_handler *type_handler_for_comparison() const;
enum_field_types field_type() const { return MYSQL_TYPE_DATETIME; }
protocol_send_type_t protocol_send_type() const
@ -5525,6 +5544,8 @@ public:
bool show_field) const;
Item *create_typecast_item(THD *thd, Item *item,
const Type_cast_attributes &attr) const;
bool validate_implicit_default_value(THD *thd,
const Column_definition &def) const;
void Column_definition_implicit_upgrade(Column_definition *c) const;
bool Column_definition_fix_attributes(Column_definition *c) const;
uint Item_decimal_scale(const Item *item) const
@ -5621,6 +5642,7 @@ protected:
public:
virtual ~Type_handler_timestamp_common() {}
const Name name() const { return m_name_timestamp; }
const Name &default_value() const;
const Type_handler *type_handler_for_comparison() const;
const Type_handler *type_handler_for_native_format() const;
enum_field_types field_type() const { return MYSQL_TYPE_TIMESTAMP; }