eckit::sql::expression::ColumnExpression class

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

Base classes

class SQLExpression

Derived classes

class BitColumnExpression

Public static functions

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

Constructors, destructors, conversion operators

ColumnExpression(const std::string&, const SQLTable*, int begin = -1, int end = -1)

ColumnExpression(const std::string&, const std::string& tableReference, int begin = -1, int end = -1)

ColumnExpression(const ColumnExpression&) defaulted

~ColumnExpression()

Public functions

auto table() -> const SQLTable*

auto current() -> const double*

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

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

auto nominalShift(int n) -> SQLExpression*

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

auto isNumber() const -> bool virtual

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

void title(const std::string&) virtual

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

auto isAggregate() const -> bool virtual

void partialResult() 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

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 eval(bool& missing) const -> double override

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

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

auto isConstant() const -> bool override

void output(SQLOutput& s) const override

auto tableColumnToFullname(const SQLColumn& column) const -> std::string virtual

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

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

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

Function documentation