Vertica::VerticaValueRange Class Reference

This class represents value ranges used in analyzing the output of UDSFs. A range is expressed as a minimum/maximum value (inclusive) pair.

Inheritance diagram for Vertica::VerticaValueRange:

Collaboration diagram for Vertica::VerticaValueRange:

Classes
struct	ValueRange

Public Types
enum	BoundType { LO_BOUND, UP_BOUND }

Public Member Functions
	VerticaValueRange (size_t narg)
bool	canHaveNulls (size_t idx) const
	Indicates if there can be NULL values in the range.
template
const T *	getColPtr (size_t idx) const
template
T *	getColPtrForWrite (size_t idx)
size_t	getNumRanges () const
	Retrieve the number of range arguments.
const VerticaType &	getRangeType (size_t idx) const
	Returns the data type of the values in a range.
EE::ValueSort	getSortedness (size_t idx) const

Protected Member Functions
void	addArg (char *loBound, char *upBound, const VerticaType &dt, EE::ValueSort sortedness, bool canHaveNulls)
void	setCanHaveNulls (size_t idx, bool u)
	Set a flag to indicate that some values in this range can be NULL.
void	setSortedness (size_t idx, EE::ValueSort s)

Protected Attributes
size_t	narg
std::vector	ranges
std::vector	svWrappersLo
std::vector	svWrappersUp
std::vector	uuWrappersLo
std::vector	uuWrappersUp
std::vector	vnWrappersLo
std::vector	vnWrappersUp

Friends
struct	::AnalyzeUDSFHandler
struct	::UDxExecContext

Detailed Description

This class represents value ranges used in analyzing the output of UDSFs. A range is expressed as a minimum/maximum value (inclusive) pair.

Instances of this class are used to allow UDSF developers to specify what the output range of of the function is. The UDSF developer is responsible to override ScalarFunction::getOutputRange() and set the function's output range using the knowledge of the input argument ranges passed as references to ScalarFunction::getOutputRange().

Member Function Documentation

void Vertica::VerticaValueRange::addArg(char * loBound, char * upBound, const VerticaType & dt, EE::ValueSort sortedness, bool canHaveNulls)

inlineprotected

Add a value range of a particular function argument

Parameters

• loBound: Base location to find the lower bound data
• upBound: Base location to find the upper bound data
• sortedness: Sortedness of values in the range
• dt: The data type of range bounds

bool Vertica::VerticaValueRange::canHaveNulls(size_t idx) const

inline Indicates if there can be NULL values in the range.

Parameters

• idx: the range argument number.

Returns TRUE if some range values can be NULL, else FALSE.

size_t Vertica::VerticaValueRange::getNumRanges() const

inline Retrieve the number of range arguments.

Returns the number of range arguments held by this object.

const VerticaType& Vertica::VerticaValueRange::getRangeType(size_t idx) const

inline Returns the data type of the values in a range.

Parameters

• idx: The index of the range

Returns a VerticaType object describing the data type of the range values.

void Vertica::VerticaValueRange::setCanHaveNulls(size_t idx, bool u)

inlineprotected

Set a flag to indicate that some values in this range can be NULL.

Parameters

• idx: The argument range number.
• u: true if there can be NULL values in the range, else false.