gis0geo.h File Reference

The r-tree define from MyISAM. More...

#include "page0types.h"
#include "sql/gis/rtree_support.h"

Go to the source code of this file.

Classes
struct	rtr_split_node_t

Namespaces
namespace	dd
	The version of the current data dictionary table definitions.

Functions
static double *	reserve_coords (double **d_buffer, int n_dim)
	Inline function for reserving coords. More...
int	split_rtree_node (rtr_split_node_t *node, int n_entries, int all_size, int key_size, int min_size, int size1, int size2, double **d_buffer, int n_dim, uchar *first_rec, const dd::Spatial_reference_system *srs)
	Split rtree nodes. More...
bool	rtree_key_cmp (page_cur_mode_t mode, const uchar *a, int a_len, const uchar *b, int b_len, const dd::Spatial_reference_system *srs)
	Compares two keys a and b depending on mode mode can contain these flags: PAGE_CUR_INTERSECT a intersects b PAGE_CUR_CONTAIN a contains b PAGE_CUR_DISJOINT a disjoint b PAGE_CUR_WITHIN a within b PAGE_CUR_MBR_EQUAL All coordinates of MBRs are equal. More...

Variables
constexpr uint32_t	SPLEN = 8

Detailed Description

The r-tree define from MyISAM.

Function Documentation

reserve_coords()

static double * reserve_coords ( double **  d_buffer, int  n_dim  )

inlinestatic

Inline function for reserving coords.

Parameters

d_buffer	in/out: buffer.
n_dim	in: dimensions.

rtree_key_cmp()

bool rtree_key_cmp	(	page_cur_mode_t	mode,
		const uchar *	a,
		int	a_len,
		const uchar *	b,
		int	b_len,
		const dd::Spatial_reference_system *	srs
	)

Compares two keys a and b depending on mode mode can contain these flags: PAGE_CUR_INTERSECT a intersects b PAGE_CUR_CONTAIN a contains b PAGE_CUR_DISJOINT a disjoint b PAGE_CUR_WITHIN a within b PAGE_CUR_MBR_EQUAL All coordinates of MBRs are equal.

Parameters

[in]	mode	compare method
[in]	a	first key
[in]	a_len	first key len
[in]	b	second key
[in]	b_len	second_key_len
[in]	srs	Spatial reference system of R-tree

Return values

true	if the predicate is true, otherwise false.

split_rtree_node()

int split_rtree_node	(	rtr_split_node_t *	node,
		int	n_entries,
		int	all_size,
		int	key_size,
		int	min_size,
		int	size1,
		int	size2,
		double **	d_buffer,
		int	n_dim,
		uchar *	first_rec,
		const dd::Spatial_reference_system *	srs
	)

Split rtree nodes.

Return which group the first rec is in.
in: SRS of R-tree

Split rtree nodes.

Return which group the first rec is in.

Parameters

node	in: split nodes.
n_entries	in: entries number.
all_size	in: total key's size.
key_size	in: key's size.
min_size	in: minimal group size.
size1	in: size of group.
size2	in: initial group sizes
d_buffer	in/out: buffer.
n_dim	in: dimensions.
first_rec	in: the first rec.
srs	in: SRS of R-tree

Variable Documentation

SPLEN

constexpr uint32_t SPLEN = 8

constexpr