l0st是什么意思中文

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ST_Intersection

insert into agg_result values(0,ST_GeomFromText('POLYGON((0 0,0 0.5,0.5 0.5,0.5 0,0 0))'));insert into agg_result select i,st_buffer('POINT(0 0)',0.8+random()*0.1)from generate_series(1,100)as i;select st_astext(st_...

ST_SetPoint

将传入LineString中给定序号的坐标点替换为参数中指定的坐标点。语法 geometry ST_SetPoint...示例 SELECT ST_AsText(ST_SetPoint(ST_GeomFromText('LINESTRING(2 1,1 1)'),0,ST_MakePoint(0,1)));st_astext-LINESTRING(0 1,1 1)(1 row)

ST_SetPoint

将传入LineString中给定序号的坐标点替换为参数中指定的坐标点。语法 geometry ST_SetPoint...示例 SELECT ST_AsText(ST_SetPoint(ST_GeomFromText('LINESTRING(2 1,1 1)'),0,ST_MakePoint(0,1)));st_astext-LINESTRING(0 1,1 1)(1 row)

ST_SetPoint

将传入LineString中给定序号的坐标点替换为参数中指定的坐标点。语法 geometry ST_SetPoint...示例 SELECT ST_AsText(ST_SetPoint(ST_GeomFromText('LINESTRING(2 1,1 1)'),0,ST_MakePoint(0,1)));st_astext-LINESTRING(0 1,1 1)(1 row)

ST_RotateZ

描述 ST_RotateZ(geomA,rotRadians)是 SELECT ST_Affine(geomA,cos(rotRadians),-sin(rotRadians),0,sin(rotRadians),cos(rotRadians),000,1,000)的简写。该函数支持Circular Strings、Curves、Polyhedral ...

ST_RotateZ

描述 ST_RotateZ(geomA,rotRadians)是 SELECT ST_Affine(geomA,cos(rotRadians),-sin(rotRadians),0,sin(rotRadians),cos(rotRadians),000,1,000)的简写。该函数支持Circular Strings、Curves、Polyhedral ...

ST_RotateZ

描述 ST_RotateZ(geomA,rotRadians)是 SELECT ST_Affine(geomA,cos(rotRadians),-sin(rotRadians),0,sin(rotRadians),cos(rotRadians),000,1,000)的简写。该函数支持Circular Strings、Curves、Polyhedral ...

ST_IsValid

测试给定的ST_Geometry值是否格式正确。语法 boolean ST_IsValid(geometry g);...示例 SELECT ST_IsValid('POLYGON((0 0,0 1,1 0,1 1,0 0))':geometry);NOTICE:Self-intersection at or near point 0.5 0.5 st_isvalid-f(1 row)

ST_IsValid

测试给定的ST_Geometry值是否格式正确。语法 boolean ST_IsValid(geometry g);...示例 SELECT ST_IsValid('POLYGON((0 0,0 1,1 0,1 1,0 0))':geometry);NOTICE:Self-intersection at or near point 0.5 0.5 st_isvalid-f(1 row)

ST_IsValid

测试给定的ST_Geometry值是否格式正确。语法 boolean ST_IsValid(geometry g);...示例 SELECT ST_IsValid('POLYGON((0 0,0 1,1 0,1 1,0 0))':geometry);NOTICE:Self-intersection at or near point 0.5 0.5 st_isvalid-f(1 row)

Accessor functions

Returned results:+-+|ST_XMin(ST_GeomFromText('MULTIPOINT(1 2,2 4,3 6,4 8)'))|+-+|1.0|ST_YMin ST_YMin(g1)Description:This function returns the minimum Y coordinate of g1.Data type of the return value:DOUBLE.Example:SELECT ...

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);...示例 SELECT ST_AsText(ST_ClosestPoint('LINESTRING(0-1,0 1)':geometry,'POINT(1 0)':geometry));st_astext-POINT(0 0)(1 row)

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);...示例 SELECT ST_AsText(ST_ClosestPoint('LINESTRING(0-1,0 1)':geometry,'POINT(1 0)':geometry));st_astext-POINT(0 0)(1 row)

ST_Force3D

将Geometry对象强制转换为XYZ模式。语法 geometry ST_Force3D(geometry geomA);参数 参数名称 描述 geomA 目标Geometry对象。描述 这是ST_Force_3DZ的别名。如果Geometry原本没有Z坐标,则将其Z坐标设为0。...st_asewkt-POINT(1 2 0)(1 row)

ST_Force3D

将Geometry对象强制转换为XYZ模式。语法 geometry ST_Force3D(geometry geomA);参数 参数名称 描述 geomA 目标Geometry对象。描述 这是ST_Force_3DZ的别名。如果Geometry原本没有Z坐标,则将其Z坐标设为0。...st_asewkt-POINT(1 2 0)(1 row)

ST_Force3D

将Geometry对象强制转换为XYZ模式。语法 geometry ST_Force3D(geometry geomA);参数 参数名称 描述 geomA 目标Geometry对象。描述 这是ST_Force_3DZ的别名。如果Geometry原本没有Z坐标,则将其Z坐标设为0。...st_asewkt-POINT(1 2 0)(1 row)

ST_CoordDim

st_coorddim-2(1 row)3维对象(3DM和3DZ):SELECT ST_CoordDim('POINT(1 0 1)');st_coorddim-3(1 row)SELECT ST_CoordDim('POINTM(1 0 1)');st_coorddim-3(1 row)4维对象:SELECT ST_CoordDim('POINT(1 0 1 1)');st_coorddim-4(1 row)

ST_CoordDim

st_coorddim-2(1 row)3维对象(3DM和3DZ):SELECT ST_CoordDim('POINT(1 0 1)');st_coorddim-3(1 row)SELECT ST_CoordDim('POINTM(1 0 1)');st_coorddim-3(1 row)4维对象:SELECT ST_CoordDim('POINT(1 0 1 1)');st_coorddim-4(1 row)

ST_CoordDim

st_coorddim-2(1 row)3维对象(3DM和3DZ):SELECT ST_CoordDim('POINT(1 0 1)');st_coorddim-3(1 row)SELECT ST_CoordDim('POINTM(1 0 1)');st_coorddim-3(1 row)4维对象:SELECT ST_CoordDim('POINT(1 0 1 1)');st_coorddim-4(1 row)

ST_Clip

使用geometry裁剪-都是用默认值裁剪 SELECT(ST_CLIP(rast,ST_geomfromtext('Polygon((0 0,45 45,90 45,45 0,0 0))',4326),0)).*from clip_table where id=1-使用白色作为背景色填充并且压缩为png图片 SELECT(ST_CLIP(rast,ST_geomfromtext...

ST_Clip

使用geometry裁剪-都是用默认值裁剪 SELECT(ST_CLIP(rast,ST_geomfromtext('Polygon((0 0,45 45,90 45,45 0,0 0))',4326),0)).*from clip_table where id=1-使用白色作为背景色填充并且压缩为png图片 SELECT(ST_CLIP(rast,ST_geomfromtext...

ST_Clip

使用白色作为背景色填充并且压缩为png图片 SELECT(ST_CLIP(rast,ST_geomfromtext('Polygon((0 0,45 45,90 45,45 0,0 0))',4326),0,'',ARRAY[254,254,254],'','{"compression":"png","interleaving":"bip"}')).*from clip_table where id=1;...

ST_{2D|2DT|3D|3DT}DWithin

b,ST_PGEpochToTS(0),ST_PGEpochToTS(49),19),ST_2dtDWithin(a,b,ST_PGEpochToTS(0),ST_PGEpochToTS(50),20),ST_3dtDWithin(a,b,ST_PGEpochToTS(0),ST_PGEpochToTS(50),20),ST_2dtDWithin(a,b,ST_PGEpochToTS(0),ST_PGEpochToTS(70),21),ST...

ST_{2D|2DT|3D|3DT}DWithin

b,ST_PGEpochToTS(0),ST_PGEpochToTS(49),19),ST_2dtDWithin(a,b,ST_PGEpochToTS(0),ST_PGEpochToTS(50),20),ST_3dtDWithin(a,b,ST_PGEpochToTS(0),ST_PGEpochToTS(50),20),ST_2dtDWithin(a,b,ST_PGEpochToTS(0),ST_PGEpochToTS(70),21),ST...

ST_{2D|2DT|3D|3DT}DWithin

b,ST_PGEpochToTS(0),ST_PGEpochToTS(49),19),ST_2dtDWithin(a,b,ST_PGEpochToTS(0),ST_PGEpochToTS(50),20),ST_3dtDWithin(a,b,ST_PGEpochToTS(0),ST_PGEpochToTS(50),20),ST_2dtDWithin(a,b,ST_PGEpochToTS(0),ST_PGEpochToTS(70),21),ST...

ST_{2D|2DT|3D|3DT}DWithin

b,ST_PGEpochToTS(0),ST_PGEpochToTS(49),19),ST_2dtDWithin(a,b,ST_PGEpochToTS(0),ST_PGEpochToTS(50),20),ST_3dtDWithin(a,b,ST_PGEpochToTS(0),ST_PGEpochToTS(50),20),ST_2dtDWithin(a,b,ST_PGEpochToTS(0),ST_PGEpochToTS(70),21),ST...

ST_Project

将一个Geography坐标点按给定的距离(以米为单位)和角度(北方为0度,东方为90度,南方为180度,西方是270度)做投影变换。语法 geography ST_Project(geography g1,float distance,float azimuth);参数 参数名称 描述 g1 目标Geography...

ST_Project

将一个Geography坐标点按给定的距离(以米为单位)和角度(北方为0度,东方为90度,南方为180度,西方是270度)做投影变换。语法 geography ST_Project(geography g1,float distance,float azimuth);参数 参数名称 描述 g1 目标Geography...

ST_Project

将一个Geography坐标点按给定的距离(以米为单位)和角度(北方为0度,东方为90度,南方为180度,西方是270度)做投影变换。语法 geography ST_Project(geography g1,float distance,float azimuth);参数 参数名称 描述 g1 目标Geography...

SELECT

Add the/*+_l_allow_filtering_*/hint to the end of inefficient query statements to skip the query check and execute the statements by force.SELECT/*+_l_allow_filtering_*/*FROM gps_data WHERE ST_Within(g,ST_GeomFromText('...

ST_Tile

从金字塔中按瓦片编号生成一个mvt标准的二进制数据。语法 bytea ST_Tile(cstring name,cstring key);bytea ST_Tile(cstring name,int x,int y,int z);...st_tile-0xFFAABB8D8A6678.select ST_Tile('roads',1,6,3);st_tile-0xFFAABB8D8A6678.

空间构造函数

返回结果:+-+|ST_AsText(ST_GeometryFromText('Point(1 1)'))|+-+|POINT(1 1)|ST_IsValidWKT ST_IsValidWKT(wkt)命令说明:返回WKT的是否是正确的WKT格式的文本,1为True,0为False。返回值类型:INT。示例:SELECT ST_IsValidWKT('...

ST_3DClosestPoint

返回Geometry1上最接近Geometry2的三维点。此点也是Geometry1和Geometry2之间...示例 SELECT ST_AsText(ST_3DClosestPoint('LINESTRING(0 0 0,1 1 1)':geometry,'LINESTRING(0 0 1,1 1 0)':geometry));st_astext-POINT Z(0.5 0.5 0.5)(1 row)

访问函数

返回结果:+-+|astext|+-+|POINT(0 0)|+-+示例2 SELECT ST_AsText(ST_Centroid(ST_GeomFromText('LINESTRING(0 0,0 1,1 2)')))AS astext;返回结果:+-+|astext|+-+|POINT(0.2928932188134525|1.085786437626905)|+-+ST_EndPoint 指定...

访问函数

返回结果:+-+|astext|+-+|POINT(0 0)|+-+示例2 SELECT ST_AsText(ST_Centroid(ST_GeomFromText('LINESTRING(0 0,0 1,1 2)')))AS astext;返回结果:+-+|astext|+-+|POINT(0.2928932188134525|1.085786437626905)|+-+ST_EndPoint 指定...

ST_NumPoints

返回一个LineString或CircularString中包含的点的个数。语法 integer ST_NumPoints(geometry g1);参数 参数名称 描述 g1 目标Geometry对象。...示例 SELECT ST_NumPoints('LineString(0 0,0 1,1 1)':geometry);st_numpoints-3(1 row)

ST_NumPoints

返回一个LineString或CircularString中包含的点的个数。语法 integer ST_NumPoints(geometry g1);参数 参数名称 描述 g1 目标Geometry对象。...示例 SELECT ST_NumPoints('LineString(0 0,0 1,1 1)':geometry);st_numpoints-3(1 row)

ST_NumPoints

返回一个LineString或CircularString中包含的点的个数。语法 integer ST_NumPoints(geometry g1);参数 参数名称 描述 g1 目标Geometry对象。...示例 SELECT ST_NumPoints('LineString(0 0,0 1,1 1)':geometry);st_numpoints-3(1 row)

ST_LineInterpolatePoints

st_astext-MULTIPOINT((0 1.00002443285827),(0 2.00004274948544),(0 3.00004884128919),(0 4.00003661494431),(0 5))不重复插入:SELECT ST_AsText(ST_LineInterpolatePoints('LINESTRING(0 0,0 5)',0.20,false));st_astext-POINT(0 1)(1...

ST_LineInterpolatePoints

st_astext-MULTIPOINT((0 1.00002443285827),(0 2.00004274948544),(0 3.00004884128919),(0 4.00003661494431),(0 5))不重复插入:SELECT ST_AsText(ST_LineInterpolatePoints('LINESTRING(0 0,0 5)',0.20,false));st_astext-POINT(0 1)(1...
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