Name
ST_AsHEXEWKB — 使用小端(NDR)或大端(XDR)编码返回HEXEWKB格式(文本形式)的几何图形。
Synopsis
text
ST_AsHEXEWKB
(
geometry
g1
, text
NDRorXDR
)
;
text
ST_AsHEXEWKB
(
geometry
g1
)
;
描述
使用小端(NDR)或大端(XDR)编码返回HEXEWKB格式(文本形式)的几何图形。如果未指定编码，则使用NDR。
![[Note]](images/note.png)
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可用性：1.2.2 |
This function supports 3d and will not drop the z-index.
This method supports Circular Strings and Curves
示例
SELECT ST_AsHEXEWKB(ST_GeomFromText('POLYGON((0 0,0 1,1 1,1 0,0 0))',4326));
which gives same answer as
SELECT ST_GeomFromText('POLYGON((0 0,0 1,1 1,1 0,0 0))',4326)::text;
st_ashexewkb
--------
0103000020E6100000010000000500
00000000000000000000000000000000
00000000000000000000000000000000F03F
000000000000F03F000000000000F03F000000000000F03
F000000000000000000000000000000000000000000000000