Oracle_spatial的空间操作符介绍

Oracle_spatial的空间操作符介绍

空间操作符

一、主要空间操作符

1、SDO_FILTER

SDO_FILTER(geometry1, geometry2, param);判断两个几何体是否有相交

SELECT c.mkt_id, c.name

FROM cola_markets c

WHERE SDO_FILTER(c.shape,

SDO_GEOMETRY(2003,

NULL,

NULL,

SDO_ELEM_INFO_ARRAY(1, 1003, 3),

SDO_ORDINATE_ARRAY(4, 6, 8, 8))) = 'TRUE';

2、SDO_JOIN

SDO_JOIN(table_name1, column_name1, table_name2, column_name2, params,preserve_join_order) RETURN SDO_ROWIDSET;

SELECT /*+ ordered */

a.name, b.name

FROM TABLE(SDO_JOIN('COLA_MARKETS',

'SHAPE',

'COLA_MARKETS',

'SHAPE',

'mask=ANYINTERACT')) c,

cola_markets a,

cola_markets b

WHERE c.rowid1 = a.rowid

AND c.rowid2 = b.rowid

ORDER BY a.name;

3、SDO_NN

SDO_NN(geometry1, geometry2, param [, number]);在指定的距离内，按顺序返回离的最近的。

性能调优参数

sdo_num_res 指定返回离指定点最近的两个市场

sdo_batch_size 指定了一次批量提取多少条记录进行对比

SELECT /*+ INDEX(c cola_spatial_idx) */

c.mkt_id, c.name

FROM cola_markets c

WHERE SDO_NN(c.shape,

sdo_geometry(2001,

NULL,

sdo_point_type(10, 7, NULL),

NULL,

NULL),

'sdo_num_res=2') = 'TRUE';

SELECT /*+ INDEX(c cola_spatial_idx) */

c.mkt_id, c.name

FROM cola_markets c

WHERE SDO_NN(c.shape,

sdo_geometry(2001,

NULL,

sdo_point_type(10, 7, NULL),

NULL,

NULL),

'sdo_batch_size=3') = 'TRUE'

AND c.name < 'cola_d'

AND ROWNUM <= 2;

4、SDO_NN_DISTANCE

SDO_NN_DISTANCE(number);Number必须与sdo_nn操作符的最后一个参数保持一致。

Sdo_nn操作符是通过计算距离来识别客户的，我们可以通过sdo_nn_distance辅助操作符来获取这些距离。

在使用该操作符时，必须指定一个性能调优参数，sdo_num_res或sdo_batch_size，如果不知道如何设置sdo_batch_size的值，就将其设为0，索引会在内部使用合适的值。

SELECT /*+ INDEX(c cola_spatial_idx) */

c.mkt_id, c.name, SDO_NN_DISTANCE(1) dist

FROM cola_markets c

WHERE SDO_NN(c.shape,

sdo_geometry(2001,

NULL,

sdo_point_type(10, 7, NULL),

NULL,

NULL),

'sdo_num_res=2',

1) = 'TRUE'

ORDER BY dist;

5、SDO_RELATE

SDO_RELATE(geometry1, geometry2, param);判断两个几何体的关系

SELECT a.gid

FROM polygons a, query_polys B

WHERE B.gid = 1

AND SDO_RELATE(A.Geometry, B.Geometry, 'mask=touch') = 'TRUE'

UNION ALL

SELECT a.gid

FROM polygons a, query_polys B

WHERE B.gid = 1

AND SDO_RELATE(A.Geometry, B.Geometry, 'mask=coveredby') = 'TRUE';

SELECT c.mkt_id, c.name

FROM cola_markets c

WHERE SDO_RELATE(c.shape,

SDO_GEOMETRY(2003,

NULL,

NULL,

SDO_ELEM_INFO_ARRAY(1, 1003, 3),

SDO_ORDINATE_ARRAY(4, 6, 8, 8)),

'mask=anyinteract') = 'TRUE';

6、SDO_WITHIN_DISTANCE

SDO_WITHIN_DISTANCE(geometry1, aGeom, params);返回与指定点相距指定的距离内的某表的几何对象

SELECT c.name

FROM cola_markets c

WHERE SDO_WITHIN_DISTANCE(c.shape,

SDO_GEOMETRY(2003,

NULL,

NULL,

SDO_ELEM_INFO_ARRAY(1, 1003, 3),

SDO_ORDINATE_ARRAY(4, 6, 8, 8)),

'distance=10') = 'TRUE';

二、关系操作符

语法：操作符OVERLAPBDYDISJOINT(geometry1, geometry2);

1、SDO_ANYINTERACT

2、SDO_CONTAINS

3、SDO_COVEREDBY

4、SDO_COVERS

5、SDO_EQUAL

6、SDO_INSIDE

7、SDO_ON

8、SDO_OVERLAPBDYDISJOINT

9、SDO_OVERLAPBDYINTERSECT

10、SDO_OVERLAPS

11、SDO_TOUCH

空间函数与操作符的对比

1、 空间操作符使用的表必须有空间索引；

空间操作符执行速度比函数快，因此可以采用操作符的情况下就使用操作符 

2016-03-08 09:18 本站整理 浏览(25)

空间操作符

一、主要空间操作符

1、SDO_FILTER

SDO_FILTER(geometry1, geometry2, param);判断两个几何体是否有相交

SELECT c.mkt_id, c.name

FROM cola_markets c

WHERE SDO_FILTER(c.shape,

SDO_GEOMETRY(2003,

NULL,

NULL,

SDO_ELEM_INFO_ARRAY(1, 1003, 3),

SDO_ORDINATE_ARRAY(4, 6, 8, 8))) = 'TRUE';

2、SDO_JOIN

SDO_JOIN(table_name1, column_name1, table_name2, column_name2, params,preserve_join_order) RETURN SDO_ROWIDSET;

SELECT /*+ ordered */

a.name, b.name

FROM TABLE(SDO_JOIN('COLA_MARKETS',

'SHAPE',

'COLA_MARKETS',

'SHAPE',

'mask=ANYINTERACT')) c,

cola_markets a,

cola_markets b

WHERE c.rowid1 = a.rowid

AND c.rowid2 = b.rowid

ORDER BY a.name;

3、SDO_NN

SDO_NN(geometry1, geometry2, param [, number]);在指定的距离内，按顺序返回离的最近的。

性能调优参数

sdo_num_res 指定返回离指定点最近的两个市场

sdo_batch_size 指定了一次批量提取多少条记录进行对比

SELECT /*+ INDEX(c cola_spatial_idx) */

c.mkt_id, c.name

FROM cola_markets c

WHERE SDO_NN(c.shape,

sdo_geometry(2001,

NULL,

sdo_point_type(10, 7, NULL),

NULL,

NULL),

'sdo_num_res=2') = 'TRUE';

SELECT /*+ INDEX(c cola_spatial_idx) */

c.mkt_id, c.name

FROM cola_markets c

WHERE SDO_NN(c.shape,

sdo_geometry(2001,

NULL,

sdo_point_type(10, 7, NULL),

NULL,

NULL),

'sdo_batch_size=3') = 'TRUE'

AND c.name < 'cola_d'

AND ROWNUM <= 2;

4、SDO_NN_DISTANCE

SDO_NN_DISTANCE(number);Number必须与sdo_nn操作符的最后一个参数保持一致。

Sdo_nn操作符是通过计算距离来识别客户的，我们可以通过sdo_nn_distance辅助操作符来获取这些距离。

在使用该操作符时，必须指定一个性能调优参数，sdo_num_res或sdo_batch_size，如果不知道如何设置sdo_batch_size的值，就将其设为0，索引会在内部使用合适的值。

SELECT /*+ INDEX(c cola_spatial_idx) */

c.mkt_id, c.name, SDO_NN_DISTANCE(1) dist

FROM cola_markets c

WHERE SDO_NN(c.shape,

sdo_geometry(2001,

NULL,

sdo_point_type(10, 7, NULL),

NULL,

NULL),

'sdo_num_res=2',

1) = 'TRUE'

ORDER BY dist;

5、SDO_RELATE

SDO_RELATE(geometry1, geometry2, param);判断两个几何体的关系

SELECT a.gid

FROM polygons a, query_polys B

WHERE B.gid = 1

AND SDO_RELATE(A.Geometry, B.Geometry, 'mask=touch') = 'TRUE'

UNION ALL

SELECT a.gid

FROM polygons a, query_polys B

WHERE B.gid = 1

AND SDO_RELATE(A.Geometry, B.Geometry, 'mask=coveredby') = 'TRUE';

SELECT c.mkt_id, c.name

FROM cola_markets c

WHERE SDO_RELATE(c.shape,

SDO_GEOMETRY(2003,

NULL,

NULL,

SDO_ELEM_INFO_ARRAY(1, 1003, 3),

SDO_ORDINATE_ARRAY(4, 6, 8, 8)),

'mask=anyinteract') = 'TRUE';

6、SDO_WITHIN_DISTANCE

SDO_WITHIN_DISTANCE(geometry1, aGeom, params);返回与指定点相距指定的距离内的某表的几何对象

SELECT c.name

FROM cola_markets c

WHERE SDO_WITHIN_DISTANCE(c.shape,

SDO_GEOMETRY(2003,

NULL,

NULL,

SDO_ELEM_INFO_ARRAY(1, 1003, 3),

SDO_ORDINATE_ARRAY(4, 6, 8, 8)),

'distance=10') = 'TRUE';

二、关系操作符

语法：操作符OVERLAPBDYDISJOINT(geometry1, geometry2);

1、SDO_ANYINTERACT

2、SDO_CONTAINS

3、SDO_COVEREDBY

4、SDO_COVERS

5、SDO_EQUAL

6、SDO_INSIDE

7、SDO_ON

8、SDO_OVERLAPBDYDISJOINT

9、SDO_OVERLAPBDYINTERSECT

10、SDO_OVERLAPS

11、SDO_TOUCH

空间函数与操作符的对比

1、 空间操作符使用的表必须有空间索引；

空间操作符执行速度比函数快，因此可以采用操作符的情况下就使用操作符

 

 

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