Constructors.sql File Reference

File containing the implementation of the Trajectory data type. More...

Functions
trajectory	trajectory ()
	The function constructs an empty trajectory. More...
trajectory	trajectory (pointst point)
	The function constructs a trajectory with a single point. More...
trajectory	trajectory (pointst[] pointarray)
	The function constructs a trajectory. More...
integer	trajcache_allocate (integer length)
	The function allocates the appropriate space in memory for a trajectory. More...
void	trajcache_free (integer cache_id)
void	trajcache_clean ()
void	trajcache_resetindex (integer cache_id)
	The function resets the index of the current allocation and set it at the beginning for a trajectory. More...
void	trajcache_rewind (integer cache_id)
void	trajcache_append (integer cache_id, pointst point)
	The function append the PointSTs to the trajectory one by one. More...
integer	trajcache_index (integer cache_id)
pointst	trajcache_point (integer cache_id, integer i)
trajectory	trajcache2trajectory (integer cache_id)
	The function materialize the trajectory. More...

Detailed Description

File containing the implementation of the Trajectory data type.

Author

Marios Vodas (mvoda.nosp@m.s@gm.nosp@m.ail.c.nosp@m.om).

See also

Trajectory

Trajectory type

Function Documentation

trajectory trajcache2trajectory

(

integer

cache_id

)

The function materialize the trajectory.

Parameters

[in]

cache_id

the identifier of the trajectory

Returns

the actual trajectory

integer trajcache_allocate

(

integer

length

)

The function allocates the appropriate space in memory for a trajectory.

Parameters

[in]

length

The length of the trajectory

Returns

an integer which is an identifier of the current allocation

void trajcache_append	(	integer	cache_id,
		pointst	point
	)

The function append the PointSTs to the trajectory one by one.

Parameters

[in]	cache_id	the identifier of the trajectory
[in]	point	the point to be appended

void trajcache_clean

(

)

void trajcache_free

(

integer

cache_id

)

integer trajcache_index

(

integer

cache_id

)

pointst trajcache_point	(	integer	cache_id,
		integer	i
	)

void trajcache_resetindex

(

integer

cache_id

)

The function resets the index of the current allocation and set it at the beginning for a trajectory.

Parameters

[in]

cache_id

the identifier of the TrajCache allocation

void trajcache_rewind

(

integer

cache_id

)

trajectory trajectory

(

)

The function constructs an empty trajectory.

Returns

the actual trajectory

Referenced by accelerationAtTTrajectory(), atInstantTrajectory(), atPeriodTrajectory(), expandOnPointTrajectory(), expandOnSegmentTrajectory(), pointsTrajectory(), reallocateTrajectory(), segmentsTrajectory(), speedAtTTrajectory(), and updateMetadataTrajectory().

trajectory trajectory

(

pointst

point

)

The function constructs a trajectory with a single point.

Parameters

[in]

point

an array of PointST

Returns

the actual trajectory

trajectory trajectory

(

pointst[]

pointarray

)

The function constructs a trajectory.

Parameters

[in]

pointArray

an array of PointST

Returns

the actual trajectory