libpqxx
The C++ client library for PostgreSQL
 
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pqxx::nullness< bytes_view > Struct Reference
+ Inheritance diagram for pqxx::nullness< bytes_view >:

Static Public Member Functions

static bool is_null (bytes_view const &value)
 Is value a null?
 
static bytes_view null ()
 Return a null value.
 
- Static Public Member Functions inherited from pqxx::no_null< bytes_view >
static constexpr bool is_null (bytes_view const &) noexcept
 Does a given value correspond to an SQL null value?
 

Static Public Attributes

static bool has_null
 Does this type have a null value?
 
static bool always_null
 Is this type always null?
 
- Static Public Attributes inherited from pqxx::no_null< bytes_view >
static constexpr bool has_null
 Does TYPE have a "built-in null value"?
 
static constexpr bool always_null
 Are all values of this type null?
 

Member Function Documentation

◆ null()

static bytes_view pqxx::nullness< bytes_view, void >::null ( )
staticnodiscard

Return a null value.

Don't use this in generic code to compare a value and see whether it is null. Some types may have multiple null values which do not compare as equal, or may define a null value which is not equal to anything including itself, like in SQL.


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