更新字段几何图形多边形PostGIS PostgreSQL
我在尝试更新字段时遇到一些问题 我创建了一个列作为更新字段几何图形多边形PostGIS PostgreSQL,sql,postgresql,geometry,sql-update,postgis,Sql,Postgresql,Geometry,Sql Update,Postgis,我在尝试更新字段时遇到一些问题 我创建了一个列作为text,并用(lon,lat)存储了许多行。现在,我又创建了一个字段,名为几何体(多边形),我试图更新它,但没有成功 数据的存储方式如下: POLYGON ((-16.6318775869111 -52.5925428149806, -16.6346393504709 -52.572542814981 , -16.629462102066 -52.5525428149806, -16.6255191065928 -52.5455
text
,并用(lon,lat)
存储了许多行。现在,我又创建了一个字段,名为几何体(多边形)
,我试图更新它,但没有成功
数据的存储方式如下:
POLYGON ((-16.6318775869111 -52.5925428149806, -16.6346393504709 -52.572542814981
, -16.629462102066 -52.5525428149806, -16.6255191065928 -52.5455420519144
, -16.6055191065928 -52.5488828022871, -16.6021791014778 -52.552542814981
, -16.6108484688169 -52.5925428149806, -16.6255191065928 -52.599495926874
, -16.6318775869111 -52.5925428149806))
UPDATE table_name
SET field_as_geomtry = ST_GeomFromText(field_as_text);
我正在尝试这个命令
UPDATE field_as_text
SET field_as_geomtry = SELECT ST_GeomFromText(SELECT field_as_text);
我收到了这个错误消息
ERROR: syntax error at or near "select"
LINE 1: ... set field_as_geomtry = select (ST...
错误:“选择”处或附近出现语法错误
第1行:。。。将字段设置为geomtry=select(ST。。。
有谁能启发我吗?你需要从阅读开始。
应该是这样的:
POLYGON ((-16.6318775869111 -52.5925428149806, -16.6346393504709 -52.572542814981
, -16.629462102066 -52.5525428149806, -16.6255191065928 -52.5455420519144
, -16.6055191065928 -52.5488828022871, -16.6021791014778 -52.552542814981
, -16.6108484688169 -52.5925428149806, -16.6255191065928 -52.599495926874
, -16.6318775869111 -52.5925428149806))
UPDATE table_name
SET field_as_geomtry = ST_GeomFromText(field_as_text);
你需要从阅读开始。
应该是这样的:
POLYGON ((-16.6318775869111 -52.5925428149806, -16.6346393504709 -52.572542814981
, -16.629462102066 -52.5525428149806, -16.6255191065928 -52.5455420519144
, -16.6055191065928 -52.5488828022871, -16.6021791014778 -52.552542814981
, -16.6108484688169 -52.5925428149806, -16.6255191065928 -52.599495926874
, -16.6318775869111 -52.5925428149806))
UPDATE table_name
SET field_as_geomtry = ST_GeomFromText(field_as_text);