Column_meta Struct Reference

Column metadata information. More...

#include <bulk_data_service.h>

Public Types
enum class	Compare { INTEGER_SIGNED , INTEGER_UNSIGNED , BINARY , MYSQL }
	Data comparison method. More...

Public Member Functions
bool	is_integer () const
bool	can_be_stored_externally () const
	Based on the column data type check if it can be stored externally. More...
std::ostream &	print (std::ostream &out) const
	Print this object into the given output stream. More...

Public Attributes
enum_field_types	m_type
	Field type. More...
bool	m_is_nullable
	If column could be NULL. More...
bool	m_is_key
	If column is part of primary key. More...
bool	m_is_desc_key
	If the key is descending. More...
bool	m_is_prefix_key
	If the key is prefix of the column. More...
bool	m_is_fixed_len
	If it is fixed length type. More...
Compare	m_compare
	If it is integer type. More...
bool	m_is_unsigned
	If it is unsigned integer type. More...
bool	m_fixed_len_if_set_in_row
	Check the row header to find out if it is fixed length. More...
bool	m_is_single_byte_len
	If character column length can be kept in one byte. More...
uint16_t	m_fixed_len
	The length of column data if fixed. More...
uint16_t	m_max_len
	Maximum length of data in bytes. More...
uint16_t	m_index
	Index of column in row. More...
uint16_t	m_null_byte
	Byte index in NULL bitmap. More...
uint16_t	m_null_bit
	BIT number in NULL bitmap. More...
const void *	m_charset
	Character set for char & varchar columns. More...
std::string	m_field_name
	Field name. More...

Detailed Description

Column metadata information.

Member Enumeration Documentation

Compare

enum class Column_meta::Compare

strong

Data comparison method.

Enumerator
INTEGER_SIGNED
INTEGER_UNSIGNED
BINARY
MYSQL

Member Function Documentation

can_be_stored_externally()

bool Column_meta::can_be_stored_externally ( ) const

inline

Based on the column data type check if it can be stored externally.

Returns

true if the column data can be stored externally

false if the column data cannot be stored externally

is_integer()

bool Column_meta::is_integer ( ) const

inline

Returns

true if integer type.

print()

std::ostream & Column_meta::print ( std::ostream &  out ) const

inline

Print this object into the given output stream.

Parameters

[in]

out

output stream into which object will be printed

Returns

given output stream.

Member Data Documentation

m_charset

const void* Column_meta::m_charset

Character set for char & varchar columns.

m_compare

Compare Column_meta::m_compare

If it is integer type.

m_field_name

std::string Column_meta::m_field_name

Field name.

m_fixed_len

uint16_t Column_meta::m_fixed_len

The length of column data if fixed.

m_fixed_len_if_set_in_row

bool Column_meta::m_fixed_len_if_set_in_row

Check the row header to find out if it is fixed length.

For character data type the row header indicates fixed length.

m_index

uint16_t Column_meta::m_index

Index of column in row.

m_is_desc_key

bool Column_meta::m_is_desc_key

If the key is descending.

m_is_fixed_len

bool Column_meta::m_is_fixed_len

If it is fixed length type.

m_is_key

bool Column_meta::m_is_key

If column is part of primary key.

m_is_nullable

bool Column_meta::m_is_nullable

If column could be NULL.

m_is_prefix_key

bool Column_meta::m_is_prefix_key

If the key is prefix of the column.

m_is_single_byte_len

bool Column_meta::m_is_single_byte_len

If character column length can be kept in one byte.

m_is_unsigned

bool Column_meta::m_is_unsigned

If it is unsigned integer type.

m_max_len

uint16_t Column_meta::m_max_len

Maximum length of data in bytes.

m_null_bit

uint16_t Column_meta::m_null_bit

BIT number in NULL bitmap.

m_null_byte

uint16_t Column_meta::m_null_byte

Byte index in NULL bitmap.

m_type

enum_field_types Column_meta::m_type

Field type.

(enum_field_types)

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The documentation for this struct was generated from the following file:

• include/mysql/components/services/bulk_data_service.h