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MDEV-12695 Add Column_definition::type_handler()

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This commit is contained in:
Alexander Barkov
2017-05-05 07:00:18 +04:00
parent 1ff79562b8
commit aacb4d57ca
20 changed files with 202 additions and 213 deletions
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42
sql/sql_type.h
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@@ -584,6 +584,20 @@ public:
{
return MYSQL_TIMESTAMP_ERROR;
}
virtual bool is_timestamp_type() const
{
return false;
}
/**
Check whether a field type can be partially indexed by a key.
@param type field type
@retval true Type can have a prefixed key
@retval false Type can not have a prefixed key
*/
virtual bool type_can_have_key_part() const
{
return false;
}
/**
Prepared statement long data:
Check whether this parameter data type is compatible with long data.
@@ -1837,6 +1851,10 @@ public:
{
return MYSQL_TIMESTAMP_DATETIME;
}
bool is_timestamp_type() const
{
return true;
}
uint Item_decimal_scale(const Item *item) const
{
return Item_decimal_scale_with_seconds(item);
@@ -1938,7 +1956,17 @@ public:
};
class Type_handler_string: public Type_handler_string_result
class Type_handler_longstr: public Type_handler_string_result
{
public:
bool type_can_have_key_part() const
{
return true;
}
};
class Type_handler_string: public Type_handler_longstr
{
static const Name m_name_char;
public:
@@ -1979,7 +2007,7 @@ public:
};
class Type_handler_varchar: public Type_handler_string_result
class Type_handler_varchar: public Type_handler_longstr
{
static const Name m_name_varchar;
public:
@@ -2004,7 +2032,7 @@ public:
};
class Type_handler_blob_common: public Type_handler_string_result
class Type_handler_blob_common: public Type_handler_longstr
{
public:
virtual ~Type_handler_blob_common() { }
@@ -2101,6 +2129,10 @@ public:
enum_field_types field_type() const { return MYSQL_TYPE_GEOMETRY; }
bool is_param_long_data_type() const { return true; }
const Type_handler *type_handler_for_comparison() const;
bool type_can_have_key_part() const
{
return true;
}
bool subquery_type_allows_materialization(const Item *inner,
const Item *outer) const
{
@@ -2213,6 +2245,10 @@ public:
{
return m_type_handler->mysql_timestamp_type();
}
bool is_timestamp_type() const
{
return m_type_handler->is_timestamp_type();
}
void set_handler(const Type_handler *other)
{
m_type_handler= other;