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oracle spatial 查询

��剑��秋 — Fri, 15 May 2009 03:39:00 GMT

Oracle Spatial查询数据包括二个处理�q�程�Q?br /> 1.只通过索引查询候选项。通过函数SDO_FILTER实现�Q?br /> SDO_FILTER(geometry1 MDSYS.SDO_GEOMETRY, geometry2 MDSYS.SDO_GEOMETRY, params VARCHAR2)
geometry1�Q�必��L��被烦(ch��)引的几何数据
geometry2�Q�不一定是表中的空间字�D�，也不要求被烦(ch��)�?br /> params�Q�Filter�c�d��
querytype=WINDOW�Q�geometry2不要求来自表
querytype=JOIN�Q�geometry2必须来自�?br />
SELECT name boat_name
FROM mylake t
WHERE feature_id = 12
AND SDO_FILTER(t.shape, mdsys.sdo_geometry(2003,NULL,NULL,
mdsys.sdo_elem_info_array(1,1003,1),
mdsys.sdo_ordinate_array(2,2, 5,2, 5,5, 2,5, 2,2)),
'querytype=WINDOW') = 'TRUE';

2.再检查每个候选项是否和条件精��匹配。通过函数SDO_RELATE实现�Q?br /> SDO_RELATE(geometry1 MDSYS.SDO_GEOMETRY, geometry2 MDSYS.SDO_GEOMETRY, params VARCHAR2)
params�Q�masktype�c�d��

DISJOINT �?the boundaries and interiors do not intersect
TOUCH �?the boundaries intersect but the interiors do not intersect
OVERLAPBDYDISJOINT �?the interior of one object intersects the boundary and interior of the other object, but the two boundaries do not intersect. This relationship occurs, for example, when a line originates outside a polygon and ends inside that polygon.
OVERLAPBDYINTERSECT �?the boundaries and interiors of the two objects intersect
EQUAL �?the two objects have the same boundary and interior
CONTAINS �?the interior and boundary of one object is completely contained in the interior of the other object
COVERS �?the interior of one object is completely contained in the interior of the other object and their boundaries intersect
INSIDE �?the opposite of CONTAINS. A INSIDE B implies B CONTAINS A.
COVEREDBY �?the opposite of COVERS. A COVEREDBY B implies B COVERS A.
ON �?the interior and boundary of one object is on the boundary of the other object (and the second object covers the first object). This relationship occurs, for example, when a line is on the boundary of a polygon.
ANYINTERACT �?the objects are non-disjoint.
// 选择在定义矩形内的所有小�?br /> SELECT name boat_name
FROM mylake t
WHERE feature_id = 12
AND SDO_FILTER(t.shape, mdsys.sdo_geometry(2003,NULL,NULL,
mdsys.sdo_elem_info_array(1,1003,1),
mdsys.sdo_ordinate_array(2,2, 5,2, 5,5, 2,5, 2,2)),
'querytype=WINDOW') = 'TRUE'
AND SDO_RELATE(t.shape, mdsys.sdo_geometry(2003,NULL,NULL,
mdsys.sdo_elem_info_array(1,1003,1),
mdsys.sdo_ordinate_array(2,2, 5,2, 5,5, 2,5, 2,2)),
'masktype=INSIDE querytype=WINDOW') = 'TRUE'

// masktype可联合��?br /> SELECT feature_id id
FROM mylake t
WHERE feature_id = 12
AND SDO_FILTER(t.shape, mdsys.sdo_geometry(2003,NULL,NULL,
mdsys.sdo_elem_info_array(1,1003,1),
mdsys.sdo_ordinate_array(2,2, 5,2, 5,5, 2,5, 2,2)),
'querytype=WINDOW') = 'TRUE'
AND SDO_RELATE(t.shape, mdsys.sdo_geometry(2003,NULL,NULL,
mdsys.sdo_elem_info_array(1,1003,1),
mdsys.sdo_ordinate_array(2,2, 5,2, 5,5, 2,5, 2,2)),
'masktype=INSIDE+TOUCH querytype=WINDOW') = 'TRUE'

Oracle Spatial 提供的其他查询函敎ͼ�(x��)
Query Description
SDO_NN Nearest neighbor
SDO_SDO_WITHIN_DISTANCE All geometries with a certain distance

Functions Description
SDO_GEOM.SDO_MBR The minimum bounding rectangle for a geometry
SDO_GEOM.SDO_DISTANCE The distance between two geometries
SDO_GEOM.SDO_INTERSECTION Provides the intersection point of two geometries

��剑��秋 2009-05-15 11:39 发表评论

oracle 监听�E�序无法识别�q�接描述中请求的服务解决�Ҏ(gu��)��!

��剑��秋 — Tue, 12 May 2009 05:41:00 GMT

       今天打开eclipse,一�q�接数据库结果就报错,错误如下:
        Could not obtain connection metadata
        java.sql.SQLException: Listener refused the connection with the following error:
        ORA-12505, TNS:listener does not currently know of SID given in connect descriptor
        The Connection descriptor used by the client was:
        localhost:1521:orcl
        奇怪了(ji��n),我就换了(ji��n)一个jdk版本�?...到处找毛�?怎么都没解决�?..�l�果当我打开plsql,�l�果才发现plsql也连接不�?提示oracle 监听�E�序无法识别�q�接描述中请求的服务..
        于是在google的到处寻��N��题所�?�l�于让我�l�解决了(ji��n),解决�Ҏ(gu��)��如下:
        打开network/admin/listener.ora文�g,把下面这�D�话加进�?
         (SID_DESC =
           (GLOBAL_DBNAME = ORCL)
           (ORACLE_HOME = C:\oracle\product\10.2.0\db_1)
           (SID_NAME = ORCL)
          )
        加进��d��完整的如�?
        SID_LIST_LISTENER =
          (SID_LIST =
            (SID_DESC =
              (SID_NAME = PLSExtProc)
                  (ORACLE_HOME = C:\oracle\product\10.2.0\db_1)
                  (PROGRAM = extproc)
              )
             SID_DESC =
               (GLOBAL_DBNAME = ORCL)
                   (ORACLE_HOME = C:\oracle\product\10.2.0\db_1)
                   (SID_NAME = ORCL)
              )
)
        保存,再重新启动监听器,OK,一切OK....但是到现在我也不知道用的好好的oracle�H�然间出问题?sh��)?..

��剑��秋 2009-05-12 13:41 发表评论

Oracle 数据库创��I�间、创建用��h��定表�I�间

��剑��秋 — Thu, 23 Apr 2009 03:16:00 GMT

//创徏临时表空�?
create temporary tablespace user_temp
tempfile 'D:\oracle\oradata\Oracle9i\user_temp.dbf'
size 50m
autoextend on
next 50m maxsize 20480m
extent management local;
//创徏数据表空�?
create tablespace test_data
logging
datafile 'D:\oracle\oradata\Oracle9i\user_data.dbf'
size 50m
autoextend on
next 50m maxsize 20480m
extent management local;
//创徏用户�q�指定表�I�间
create user username identified by password
default tablespace user_data
temporary tablespace user_temp;
//�l�用��h��予权�?
grant connect,resource to username;
//以后以该用户��d��Q�创建的��M��数据库对象都属于user_temp 和user_data表空��_(d��)��q�就不用在每创徏一个对象给其指定表�I�间�?nbsp;
该文章�{载于�Q�http://lpcjrflsa.javaeye.com/blog/309811

��剑��秋 2009-04-23 11:16 发表评论

成人在线视频成人,亚洲精品国产精品久久清纯直播 ,成人一区二区三区在线观看

oracle spatial 查询

oracle 监听�E�序无法识别�q�接描述中请求的服务解决�Ҏ(gu��)��!

Oracle 数据库创������I�间、创建用��h��定表�I�间

Oracle 数据库创��I�间、创建用��h��定表�I�间