relx::schema::column< TableT, Name, T, Modifiers > Class Template Reference

Represents a column in a database table. More...

#include <relx/schema/column.hpp>

Public Types
using	table_type = TableT
	The table type this column belongs to.
using	value_type = T
	The C++ type of the column.

Public Member Functions
std::string	sql_definition () const
	Get the SQL definition of this column.
std::optional< T >	get_default_value () const
	Get the default value if set.
template<typename PatternType > requires std::convertible_to<PatternType, std::string>
auto	like (PatternType &&pattern) const
	Create a LIKE condition for this column.
auto	is_null () const
	Create an IS NULL condition for this column.
auto	is_not_null () const
	Create an IS NOT NULL condition for this column.

Static Public Member Functions
static std::string	to_sql_string (const T &value)
	Convert a C++ value to SQL string.
static T	from_sql_string (const std::string &sql_str)
	Parse a SQL string to C++ value.

Static Public Attributes
static constexpr auto	name = Name
	The column name.
static constexpr auto	sql_type = column_traits<T>::sql_type_name
	The SQL type of the column.
static constexpr bool	nullable = column_traits<T>::nullable
	Flag indicating if the column can be NULL.

Detailed Description

template<typename TableT, fixed_string Name, typename T, typename... Modifiers>
class relx::schema::column< TableT, Name, T, Modifiers >

Represents a column in a database table.

Template Parameters

TableT	The table type this column belongs to
Name	The name of the column as a string literal
T	The C++ type of the column
Modifiers	Additional column modifiers (UNIQUE, PRIMARY KEY, etc.)

Definition at line 217 of file column.hpp.

Member Typedef Documentation

table_type

template<typename TableT , fixed_string Name, typename T , typename... Modifiers>

using relx::schema::column< TableT, Name, T, Modifiers >::table_type = TableT

The table type this column belongs to.

Definition at line 220 of file column.hpp.

value_type

template<typename TableT , fixed_string Name, typename T , typename... Modifiers>

using relx::schema::column< TableT, Name, T, Modifiers >::value_type = T

The C++ type of the column.

Definition at line 223 of file column.hpp.

Member Function Documentation

from_sql_string()

template<typename TableT , fixed_string Name, typename T , typename... Modifiers>

static T relx::schema::column< TableT, Name, T, Modifiers >::from_sql_string ( const std::string &  sql_str )

inlinestatic

Parse a SQL string to C++ value.

Parameters

sql_str

The SQL string to parse

Returns

The C++ value

Definition at line 261 of file column.hpp.

get_default_value()

template<typename TableT , fixed_string Name, typename T , typename... Modifiers>

std::optional< T > relx::schema::column< TableT, Name, T, Modifiers >::get_default_value ( ) const

inline

Get the default value if set.

Returns

Optional containing the default value or empty if not set

Definition at line 267 of file column.hpp.

is_not_null()

template<typename TableT , fixed_string Name, typename T , typename... Modifiers>

auto relx::schema::column< TableT, Name, T, Modifiers >::is_not_null

(

)

const

Create an IS NOT NULL condition for this column.

Returns

An IS NOT NULL condition expression

Definition at line 1441 of file operators.hpp.

is_null()

template<typename TableT , fixed_string Name, typename T , typename... Modifiers>

auto relx::schema::column< TableT, Name, T, Modifiers >::is_null

(

)

const

Create an IS NULL condition for this column.

Returns

An IS NULL condition expression

Definition at line 1436 of file operators.hpp.

like()

template<typename TableT , fixed_string Name, typename T , typename... Modifiers>
requires std::convertible_to<PatternType, std::string>

template<typename PatternType >
requires std::convertible_to<PatternType, std::string>

auto relx::schema::column< TableT, Name, T, Modifiers >::like

(

PatternType &&

pattern

)

const

Create a LIKE condition for this column.

Parameters

pattern

The pattern to match against

Returns

A LIKE condition expression

Definition at line 1431 of file operators.hpp.

sql_definition()

template<typename TableT , fixed_string Name, typename T , typename... Modifiers>

std::string relx::schema::column< TableT, Name, T, Modifiers >::sql_definition ( ) const

inline

Get the SQL definition of this column.

Returns

A string containing the SQL column definition

Definition at line 236 of file column.hpp.

to_sql_string()

template<typename TableT , fixed_string Name, typename T , typename... Modifiers>

static std::string relx::schema::column< TableT, Name, T, Modifiers >::to_sql_string ( const T &  value )

inlinestatic

Convert a C++ value to SQL string.

Parameters

value

The value to convert

Returns

SQL string representation

Definition at line 254 of file column.hpp.

Member Data Documentation

name

template<typename TableT , fixed_string Name, typename T , typename... Modifiers>

constexpr auto relx::schema::column< TableT, Name, T, Modifiers >::name = Name

staticconstexpr

The column name.

Definition at line 226 of file column.hpp.

nullable

template<typename TableT , fixed_string Name, typename T , typename... Modifiers>

constexpr bool relx::schema::column< TableT, Name, T, Modifiers >::nullable = column_traits<T>::nullable

staticconstexpr

Flag indicating if the column can be NULL.

Definition at line 232 of file column.hpp.

sql_type

template<typename TableT , fixed_string Name, typename T , typename... Modifiers>

constexpr auto relx::schema::column< TableT, Name, T, Modifiers >::sql_type = column_traits<T>::sql_type_name

staticconstexpr

The SQL type of the column.

Definition at line 229 of file column.hpp.

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The documentation for this class was generated from the following files:

• relx/schema/column.hpp
• relx/query/operators.hpp