eckit::sql::expression::ConstantExpression class

#include <eckit/sql/expression/ConstantExpression.h>

Base classes

class SQLExpression

Public static functions

static auto number(double) -> std::shared_ptr<SQLExpression>

Constructors, destructors, conversion operators

ConstantExpression(double, bool, const type::SQLType*)

ConstantExpression(const ConstantExpression&, const PrivateKey&)

~ConstantExpression() override

Public functions

auto operator=(const ConstantExpression&) -> ConstantExpression& deleted

void prepare(SQLSelect&) override

void cleanup(SQLSelect&) override

auto eval(bool& missing) const -> double override

auto isConstant() const -> bool override

auto isNumber() const -> bool override

auto type() const -> const type::SQLType* override

auto clone() const -> std::shared_ptr<SQLExpression> override

auto reshift(int minColumnShift) const -> std::shared_ptr<SQLExpression> override

auto isAggregate() const -> bool override

void output(SQLOutput& s) const override

void partialResult() override

void expandStars(const std::vector<std::reference_wrapper<const SQLTable>>&, expression::Expressions&) override

auto isBitfield() const -> bool override

auto bitfieldDef() const -> BitfieldDef

auto hasMissingValue() const -> bool override

auto missingValue() const -> double

auto eval(bool& missing) const -> double pure virtual

void eval(double* out, bool& missing) const

void preprepare(SQLSelect&) virtual

void updateType(SQLSelect&) virtual

void eval(double* out, bool& missing) const virtual

auto evalAsString(bool& missing) const -> std::string virtual

auto andSplit(expression::Expressions&) -> bool virtual

void tables(std::set<const SQLTable*>&) virtual

auto simplify(bool&) -> std::shared_ptr<SQLExpression> virtual

void title(const std::string&) virtual

auto title() const -> std::string virtual

auto shared_from_this(T... args) -> T

auto weak_from_this(T... args) -> T

Private functions

void print(std::ostream&) const override

Function documentation