relx::query::aggregate_checking Namespace Reference

Type checking concepts for aggregate functions. More...

Classes
struct	extract_column_type
	Helper to extract column type for checking. More...
struct	extract_column_type< schema::column< TableT, Name, ColumnT, Modifiers... > >

Concepts
concept	Summable
	Concept for numeric types suitable for SUM and AVG.
concept	Countable
	Concept for types suitable for COUNT (any type is countable)
concept	Comparable
	Concept for comparable types suitable for MIN/MAX.

Typedefs
template<typename T >
using	extract_column_type_t = typename extract_column_type< T >::type

Detailed Description

Type checking concepts for aggregate functions.

Typedef Documentation

extract_column_type_t

template<typename T >

using relx::query::aggregate_checking::extract_column_type_t = typedef typename extract_column_type<T>::type

Definition at line 138 of file function.hpp.