ibis::colValues Class Reference

A pure virtual base class for storing selected values in memory. More...

#include <colValues.h>

Inheritance diagram for ibis::colValues:

List of all members.

Public Member Functions
virtual void	bottomk (uint32_t k, array_t< uint32_t > &ind) const =0
	Return the positions of the k smallest elements.
bool	canSort () const
const ibis::column *	columnPointer () const
virtual uint32_t	elementSize () const =0
virtual bool	empty () const =0
virtual void	erase (uint32_t i, uint32_t j)=0
virtual void *	getArray () const =0
	Return the pointer to the pointer to underlying array_t<T> object.
virtual double	getDouble (uint32_t) const =0
virtual float	getFloat (uint32_t) const =0
virtual int32_t	getInt (uint32_t) const =0
virtual int64_t	getLong (uint32_t) const =0
virtual double	getMax () const =0
virtual double	getMin () const =0
virtual double	getSum () const =0
virtual ibis::TYPE_T	getType () const =0
	Return the type of the data stored.
virtual uint32_t	getUInt (uint32_t) const =0
virtual uint64_t	getULong (uint32_t) const =0
const char *	name () const
	Name.
virtual void	nosharing ()=0
	Make sure the content of the underlying storage is not shared.
const ibis::column *	operator-> () const
	Provide a pointer to the column containing the selected values.
virtual void	reduce (const array_t< uint32_t > &starts)=0
virtual void	reduce (const array_t< uint32_t > &starts, ibis::selectClause::AGREGADO func)=0
virtual void	reorder (const array_t< uint32_t > &ind)=0
	Reorder the values according to the specified indices.
virtual array_t< uint32_t > *	segment (const array_t< uint32_t > *old=0) const =0
	Produce an array of the starting positions of values that are the same.
virtual uint32_t	size () const =0
virtual void	sort (uint32_t i, uint32_t j, bundle *bdl)=0
	Sort rows in the range [i, j).
virtual void	sort (uint32_t i, uint32_t j, bundle *bdl, colList::iterator head, colList::iterator tail)=0
	Sort rows in the range [i, j).
virtual void	sort (uint32_t i, uint32_t j, array_t< uint32_t > &neworder) const =0
	Sort rows in the range [i, j).
virtual void	swap (uint32_t i, uint32_t j)=0
void	swap (colValues &rhs)
virtual void	topk (uint32_t k, array_t< uint32_t > &ind) const =0
	Return the positions of the k largest elements.
virtual long	truncate (uint32_t keep)=0
	Truncate the number element to no more than keep.
virtual long	truncate (uint32_t keep, uint32_t start)=0
	Truncate the number element to no more than keep.
virtual long	write (FILE *fptr) const =0
	Write out whole array as binary.
virtual void	write (std::ostream &out, uint32_t i) const =0
	Write ith element as text.
Static Public Member Functions
static colValues *	create (const ibis::column *c, const ibis::bitvector &hits)
	Construct from a hit vector.
static colValues *	create (const ibis::column *c, ibis::fileManager::storage *store, const uint32_t start, const uint32_t end)
	Construct from content of the file (pointed by store).
static colValues *	create (const ibis::column *c)
	Construct from content of an array_t.
Protected Member Functions
	colValues (const ibis::column *c)
Protected Attributes
const ibis::column *	col
	The column where the value is from.

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Detailed Description

A pure virtual base class for storing selected values in memory.

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Member Function Documentation

ibis::colValues * ibis::colValues::create	(	const ibis::column *	c,
		const ibis::bitvector &	hits
	)		[static]

Construct from a hit vector.

Implementation of the colValues class hierarchy.

References ibis::BYTE, ibis::CATEGORY, ibis::DOUBLE, ibis::FLOAT, ibis::gVerbose, ibis::INT, ibis::LONG, ibis::SHORT, ibis::TEXT, ibis::column::type(), ibis::TYPESTRING, ibis::UBYTE, ibis::UINT, ibis::ULONG, and ibis::USHORT.

ibis::colValues * ibis::colValues::create	(	const ibis::column *	c,
		ibis::fileManager::storage *	store,
		const uint32_t	start,
		const uint32_t	end
	)		[static]

Construct from content of the file (pointed by store).

Use values stored in the storage object.

References ibis::BYTE, ibis::CATEGORY, ibis::DOUBLE, ibis::FLOAT, ibis::gVerbose, ibis::INT, ibis::LONG, ibis::SHORT, ibis::column::type(), ibis::TYPESTRING, ibis::UBYTE, ibis::UINT, ibis::ULONG, and ibis::USHORT.

ibis::colValues * ibis::colValues::create

(

const ibis::column *

c

)

[static]

Construct from content of an array_t.

Use all rows of the column.

References ibis::BYTE, ibis::CATEGORY, ibis::DOUBLE, ibis::FLOAT, ibis::gVerbose, ibis::INT, ibis::LONG, ibis::SHORT, ibis::TEXT, ibis::column::type(), ibis::TYPESTRING, ibis::UBYTE, ibis::UINT, ibis::ULONG, and ibis::USHORT.

virtual void ibis::colValues::reorder

(

const array_t< uint32_t > &

ind

)

[pure virtual]

Reorder the values according to the specified indices.

New[i] = Old[ind[i]].

Implemented in ibis::colStrings, ibis::colDoubles, ibis::colFloats, ibis::colUBytes, ibis::colBytes, ibis::colUShorts, ibis::colShorts, ibis::colULongs, ibis::colLongs, ibis::colUInts, and ibis::colInts.

virtual array_t<uint32_t>* ibis::colValues::segment

(

const array_t< uint32_t > *

old = 0

)

const [pure virtual]

Produce an array of the starting positions of values that are the same.

Implemented in ibis::colStrings, ibis::colDoubles, ibis::colFloats, ibis::colUBytes, ibis::colBytes, ibis::colUShorts, ibis::colShorts, ibis::colULongs, ibis::colLongs, ibis::colUInts, and ibis::colInts.

virtual void ibis::colValues::sort	(	uint32_t	i,
		uint32_t	j,
		bundle *	bdl,
		colList::iterator	head,
		colList::iterator	tail
	)		[pure virtual]

Sort rows in the range [i, j).

Also sort the columns between [head, tail).

Implemented in ibis::colStrings, ibis::colDoubles, ibis::colFloats, ibis::colUBytes, ibis::colBytes, ibis::colUShorts, ibis::colShorts, ibis::colULongs, ibis::colLongs, ibis::colUInts, and ibis::colInts.

virtual void ibis::colValues::sort	(	uint32_t	i,
		uint32_t	j,
		array_t< uint32_t > &	neworder
	)		const [pure virtual]

Sort rows in the range [i, j).

Output the new order in array neworder.

Implemented in ibis::colStrings, ibis::colDoubles, ibis::colFloats, ibis::colUBytes, ibis::colBytes, ibis::colUShorts, ibis::colShorts, ibis::colULongs, ibis::colLongs, ibis::colUInts, and ibis::colInts.

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The documentation for this class was generated from the following files:

• colValues.h
• colValues.cpp