示例 对比ST_Union和ST_Collect:SELECT ST_Union(g1,g2),ST_Collect(g1,g2)from(select 'POLYGON((0 0,1 0,1 2,0 2,0 0))':geometry as g1,'POLYGON((1 0,3 0,3 1,1 1,1 0))':geometry as g2)as t;指定gridsize和options:指定gridsize ...
示例 对比ST_Union和ST_Collect:SELECT ST_Union(g1,g2),ST_Collect(g1,g2)from(select 'POLYGON((0 0,1 0,1 2,0 2,0 0))':geometry as g1,'POLYGON((1 0,3 0,3 1,1 1,1 0))':geometry as g2)as t;指定gridsize和options:指定gridsize ...
示例 对比ST_Union和ST_Collect:SELECT ST_Union(g1,g2),ST_Collect(g1,g2)from(select 'POLYGON((0 0,1 0,1 2,0 2,0 0))':geometry as g1,'POLYGON((1 0,3 0,3 1,1 1,1 0))':geometry as g2)as t;指定gridsize和options:指定gridsize ...
示例 对比ST_3DLongestLine与ST_3DShortestLine:SELECT ST_AsText(ST_3DLongestLine(g1,g2))as lonest,ST_AsText(ST_3DShortestLine(g1,g2))as shortest from(SELECT 'POINT(0 0 0)':geometry as g1,'LINESTRING(0 0 1,1 1 0)':geometry ...
示例 对比ST_3DLongestLine与ST_3DShortestLine:SELECT ST_AsText(ST_3DLongestLine(g1,g2))as longest,ST_AsText(ST_3DShortestLine(g1,g2))as shortest from(SELECT 'POINT(0 0 0)':geometry as g1,'LINESTRING(0 0 1,1 1 0)':geometry ...
示例 对比ST_3DLongestLine与ST_3DShortestLine:SELECT ST_AsText(ST_3DLongestLine(g1,g2))as lonest,ST_AsText(ST_3DShortestLine(g1,g2))as shortest from(SELECT 'POINT(0 0 0)':geometry as g1,'LINESTRING(0 0 1,1 1 0)':geometry ...
语法 geometry ST_ShortestLine(geometry g1,geometry g2);参数 参数名称 描述 g1 第一个Geometry对象。g2 第二个Geometry对象。描述 如果找到不止一条,该函数将仅返回第一条最短的Line对象。如果g1和g2仅在一个点处相交,则该函数将返回...
语法 geometry ST_ShortestLine(geometry g1,geometry g2);参数 参数名称 描述 g1 第一个Geometry对象。g2 第二个Geometry对象。描述 如果找到不止一条,该函数将仅返回第一条最短的Line对象。如果g1和g2仅在一个点处相交,则该函数将返回...
语法 geometry ST_ShortestLine(geometry g1,geometry g2);参数 参数名称 描述 g1 第一个Geometry对象。g2 第二个Geometry对象。描述 如果找到不止一条,该函数将仅返回第一条最短的Line对象。如果g1和g2仅在一个点处相交,则该函数将返回...
024 GB memory 8×GU50 ecs.gn7i-c32g1.32xlarge 128 vCPUs+752 GB memory 4×NVIDIA A10 ecs.gn7-c13g1.13xlarge 52 vCPUs+380 GB memory 4×GU50 ecs.gn7s-c32g1.32xlarge 128 vCPUs+1,000 GB memory 4×NVIDIA A30 ecs.gn7s-c56g1.14...
通过Java GC日志分析,帮助用户从CMS GC升级到G1 GC,解决升级过程中的各种问题。用户诉求 某日接到业务同学的反馈如下:业务运行过程中经常出现超长的暂停时 间,导致健康检查失败,引发问题。应用本身是做离线数据处理,对时延要求不是很...
st_touches-t(1 row)不满足 DE-9IM 结果的情况:SELECT ST_Touches(g1,g2),ST_Relate(g1,g2)FROM(SELECT 'LINESTRING(0 0,0 2)':geometry as g1,'LINESTRING(0 1,0 3)':geometry as g2)as test;st_touches|st_relate-+-f|1010F0102(1 row)
st_touches-t(1 row)不满足 DE-9IM 结果的情况:SELECT ST_Touches(g1,g2),ST_Relate(g1,g2)FROM(SELECT 'LINESTRING(0 0,0 2)':geometry as g1,'LINESTRING(0 1,0 3)':geometry as g2)as test;st_touches|st_relate-+-f|1010F0102(1 row)
st_touches-t(1 row)不满足 DE-9IM 结果的情况:SELECT ST_Touches(g1,g2),ST_Relate(g1,g2)FROM(SELECT 'LINESTRING(0 0,0 2)':geometry as g1,'LINESTRING(0 1,0 3)':geometry as g2)as test;st_touches|st_relate-+-f|1010F0102(1 row)
示例 对比ST_Distance与 ST_3DDistance:SELECT ST_Distance(g1,g2),ST_3DDistance(g1,g2)FROM(SELECT 'POINT(0 0 0)':geometry as g1,'POINT(1 1 1)':geometry as g2)as test;st_distance|st_3ddistance-+-1.4142135623731|1....
示例 对比ST_Distance与 ST_3DDistance:SELECT ST_Distance(g1,g2),ST_3DDistance(g1,g2)FROM(SELECT 'POINT(0 0 0)':geometry as g1,'POINT(1 1 1)':geometry as g2)as test;st_distance|st_3ddistance-+-1.4142135623731|1....
示例 对比ST_Distance与 ST_3DDistance:SELECT ST_Distance(g1,g2),ST_3DDistance(g1,g2)FROM(SELECT 'POINT(0 0 0)':geometry as g1,'POINT(1 1 1)':geometry as g2)as test;st_distance|st_3ddistance-+-1.4142135623731|1....
返回Geometry对象g1之中,离g2最近的2D坐标点,返回最短线的端点。语法 geometry ST_ClosestPoint(geometry g1,geometry g2);参数 参数名称 描述 g1 第一个Geometry对象。g2 第二个Geometry对象。示例 SELECT ST_AsText(ST_ClosestPoint('...
返回Geometry对象g1之中,离g2最近的2D坐标点。语法 geometry ST_ClosestPoint(geometry g1,geometry g2);参数 参数名称 描述 g1 第一个Geometry对象。g2 第二个Geometry对象。描述 返回的是最短线的端点。示例 SELECT ST_AsText(ST_...
返回Geometry对象g1之中,离g2最近的2D坐标点。语法 geometry ST_ClosestPoint(geometry g1,geometry g2);参数 参数名称 描述 g1 第一个Geometry对象。g2 第二个Geometry对象。描述 返回的是最短线的端点。示例 SELECT ST_AsText(ST_...
语法 geometry ST_3DLongestLine(geometry g1,geometry g2);参数 参数名称 描述 g1 第一个Geometry对象。g2 第二个Geometry对象。描述 如果结果不唯一,该函数将仅返回第一条最长的Line对象。返回的Line对象将始终从g1指向g2。该函数返回的...
语法 text ST_AsText(geometry g1);text ST_AsText(geometry g1,integer maxdecimaldigits);text ST_AsText(geography g1);text ST_AsText(geography g1,integer maxdecimaldigits);参数 参数名称 描述 g1 目标Geometry/Geography对象。...
语法 geometry ST_3DLongestLine(geometry g1,geometry g2);参数 参数名称 描述 g1 第一个Geometry对象。g2 第二个Geometry对象。描述 如果结果不唯一,该函数将仅返回第一条最长的Line对象。返回的Line对象将始终从g1指向g2。该函数返回的...
语法 text ST_AsText(geometry g1);text ST_AsText(geometry g1,integer maxdecimaldigits);text ST_AsText(geography g1);text ST_AsText(geography g1,integer maxdecimaldigits);参数 参数名称 描述 g1 目标Geometry/Geography对象。...
语法 text ST_AsText(geometry g1);text ST_AsText(geometry g1,integer maxdecimaldigits);text ST_AsText(geography g1);text ST_AsText(geography g1,integer maxdecimaldigits);参数 参数名称 描述 g1 目标Geometry/Geography对象。...
语法 geometry ST_3DLongestLine(geometry g1,geometry g2);参数 参数名称 描述 g1 第一个Geometry对象。g2 第二个Geometry对象。描述 如果结果不唯一,该函数将仅返回第一条最长的Line对象。返回的Line对象将始终从g1指向g2。该函数返回的...
DFullyWithin function and the ST_DWithin function:SELECT ST_DFullyWithin(g1,g2,2),ST_DWithin(g1,g2,2)from(SELECT 'LINESTRING(0 1,1 1)':geometry as g1,'LINESTRING(0 0,0-1)':geometry as g2)as test;st_dfullywithin|st_dwithin-...
DFullyWithin function and the ST_DWithin function:SELECT ST_DFullyWithin(g1,g2,2),ST_DWithin(g1,g2,2)from(SELECT 'LINESTRING(0 1,1 1)':geometry as g1,'LINESTRING(0 0,0-1)':geometry as g2)as test;st_dfullywithin|st_dwithin-...
DFullyWithin function and the ST_DWithin function:SELECT ST_DFullyWithin(g1,g2,2),ST_DWithin(g1,g2,2)from(SELECT 'LINESTRING(0 1,1 1)':geometry as g1,'LINESTRING(0 0,0-1)':geometry as g2)as test;st_dfullywithin|st_dwithin-...
示例 对比 ST_DFullyWithin:SELECT ST_DFullyWithin(g1,g2,2),ST_DWithin(g1,g2,2)from(SELECT 'LINESTRING(0 1,1 1)':geometry as g1,'LINESTRING(0 0,0-1)':geometry as g2)as test;st_dfullywithin|st_dwithin-+-f|t(1 row)
示例 对比 ST_DFullyWithin:SELECT ST_DFullyWithin(g1,g2,2),ST_DWithin(g1,g2,2)from(SELECT 'LINESTRING(0 1,1 1)':geometry as g1,'LINESTRING(0 0,0-1)':geometry as g2)as test;st_dfullywithin|st_dwithin-+-f|t(1 row)
示例 对比 ST_DFullyWithin:SELECT ST_DFullyWithin(g1,g2,2),ST_DWithin(g1,g2,2)from(SELECT 'LINESTRING(0 1,1 1)':geometry as g1,'LINESTRING(0 0,0-1)':geometry as g2)as test;st_dfullywithin|st_dwithin-+-f|t(1 row)
语法 float ST_MaxDistance(geometry g1,geometry g2);参数 参数名称 描述 g1 第一个Geometry对象。g2 第二个Geometry对象。描述 如果g1和g2是相同的对象,则该函数将返回该对象中彼此距离最远的两个顶点之间的距离。示例 默认调用:SELECT...