eckit::sql::expression::function::FunctionNULL class
#include <eckit/sql/expression/function/FunctionNULL.h>

Base classes

class FunctionExpression

Public static functions

static auto arity() -> int
static auto help() -> const char*
static auto number(double) -> std::shared_ptr<SQLExpression>

Constructors, destructors, conversion operators

FunctionNULL(const std::string&, const expression::Expressions&)
FunctionNULL(const FunctionNULL&)
~FunctionNULL()

Public functions

auto clone() const -> std::shared_ptr<SQLExpression> override
void print(std::ostream& s) const override
void preprepare(SQLSelect&) override
void prepare(SQLSelect& sql) override
void updateType(SQLSelect& sql) override
void cleanup(SQLSelect& sql) override
auto isConstant() const -> bool override
auto simplify(bool&) -> std::shared_ptr<SQLExpression> override
auto isAggregate() const -> bool override
void partialResult() override
auto reshift(int minColumnShift) const -> std::shared_ptr<SQLExpression> override
auto args() -> expression::Expressions&
void eval(double* out, bool& missing) const virtual
auto evalAsString(bool& missing) const -> std::string virtual
auto andSplit(expression::Expressions&) -> bool virtual
auto isNumber() const -> bool virtual
void title(const std::string&) virtual
auto title() const -> std::string virtual
void output(SQLOutput&) const virtual
void expandStars(const std::vector<std::reference_wrapper<const SQLTable>>&, expression::Expressions&) virtual
auto isBitfield() const -> bool virtual
auto bitfieldDef() const -> BitfieldDef
auto hasMissingValue() const -> bool virtual
auto missingValue() const -> double
auto shared_from_this(T... args) -> T
auto weak_from_this(T... args) -> T

Private functions

auto type() const -> const eckit::sql::type::SQLType* override
auto eval(bool& missing) const -> double override

Function documentation

static const char* eckit::sql::expression::function::FunctionNULL::help()
#include <eckit/sql/expression/function/FunctionExpression.h>

static std::shared_ptr<SQLExpression> eckit::sql::expression::function::FunctionNULL::number(double)
#include <eckit/sql/expression/SQLExpression.h>

void eckit::sql::expression::function::FunctionNULL::print(std::ostream& s) const override
#include <eckit/sql/expression/function/FunctionExpression.h>

void eckit::sql::expression::function::FunctionNULL::preprepare(SQLSelect&) override
#include <eckit/sql/expression/function/FunctionExpression.h>

pre-prepare ideally wouldn't exist. To enable a two-pass prepare of SQL columns for SQLSelect, this is here.

void eckit::sql::expression::function::FunctionNULL::prepare(SQLSelect& sql) override
#include <eckit/sql/expression/function/FunctionExpression.h>

void eckit::sql::expression::function::FunctionNULL::updateType(SQLSelect& sql) override
#include <eckit/sql/expression/function/FunctionExpression.h>

void eckit::sql::expression::function::FunctionNULL::cleanup(SQLSelect& sql) override
#include <eckit/sql/expression/function/FunctionExpression.h>

bool eckit::sql::expression::function::FunctionNULL::isConstant() const override
#include <eckit/sql/expression/function/FunctionExpression.h>

std::shared_ptr<SQLExpression> eckit::sql::expression::function::FunctionNULL::simplify(bool&) override
#include <eckit/sql/expression/function/FunctionExpression.h>

bool eckit::sql::expression::function::FunctionNULL::isAggregate() const override
#include <eckit/sql/expression/function/FunctionExpression.h>

void eckit::sql::expression::function::FunctionNULL::partialResult() override
#include <eckit/sql/expression/function/FunctionExpression.h>

std::shared_ptr<SQLExpression> eckit::sql::expression::function::FunctionNULL::reshift(int minColumnShift) const override
#include <eckit/sql/expression/function/FunctionExpression.h>

expression::Expressions& eckit::sql::expression::function::FunctionNULL::args()
#include <eckit/sql/expression/function/FunctionExpression.h>

void eckit::sql::expression::function::FunctionNULL::eval(double* out, bool& missing) const virtual
#include <eckit/sql/expression/SQLExpression.h>

std::string eckit::sql::expression::function::FunctionNULL::evalAsString(bool& missing) const virtual
#include <eckit/sql/expression/SQLExpression.h>

bool eckit::sql::expression::function::FunctionNULL::andSplit(expression::Expressions&) virtual
#include <eckit/sql/expression/SQLExpression.h>

bool eckit::sql::expression::function::FunctionNULL::isNumber() const virtual
#include <eckit/sql/expression/SQLExpression.h>

void eckit::sql::expression::function::FunctionNULL::title(const std::string&) virtual
#include <eckit/sql/expression/SQLExpression.h>

std::string eckit::sql::expression::function::FunctionNULL::title() const virtual
#include <eckit/sql/expression/SQLExpression.h>

void eckit::sql::expression::function::FunctionNULL::output(SQLOutput&) const virtual
#include <eckit/sql/expression/SQLExpression.h>

void eckit::sql::expression::function::FunctionNULL::expandStars(const std::vector<std::reference_wrapper<const SQLTable>>&, expression::Expressions&) virtual
#include <eckit/sql/expression/SQLExpression.h>

bool eckit::sql::expression::function::FunctionNULL::isBitfield() const virtual
#include <eckit/sql/expression/SQLExpression.h>

BitfieldDef eckit::sql::expression::function::FunctionNULL::bitfieldDef() const
#include <eckit/sql/expression/SQLExpression.h>

bool eckit::sql::expression::function::FunctionNULL::hasMissingValue() const virtual
#include <eckit/sql/expression/SQLExpression.h>

double eckit::sql::expression::function::FunctionNULL::missingValue() const
#include <eckit/sql/expression/SQLExpression.h>