I've tried -

Update p_id.image
set the_geom =
(select st_translate(library.dgm_device.the_geom,
st_x (st_centroid(p_id.p_id.othe_geom))  -
st_x (st_centroid(library.dgm_device.ithe_geom)) ,
st_y (st_centroid(p_id.p_id.othe_geom)) - (Select Case when p_id.devices.status = 'Pump #1'
and p_id.devices.devices_id = '3614'
then - 10000) -
st_y (st_centroid(library.dgm_device.the_geom)))
from p_id.p_id, library.dgm_device, p_id.processes, processes_count, p_id.devices
where library.dgm_device.description = 'In Line Pump'
and library.dgm_device.orientation = ta_orientation
and p_id.p_id.p_id_id = processes_count.p_id_id
and p_id.p_id.process_id = p_id.processes.process_id
and p_id.devices.devices_id = '3614'
and  p_id.processes.fluid_id = p_id.devices.fluid_id)
from p_id.devices
where p_id.image.fluid_id = p_id.devices.fluid_id
and p_id.devices.devices_id = '3614'
and p_id.image.text_ = 'Pump #1'
and p_id.image.device_id = '3614';

and get ERROR:  syntax error at or near ")"
LINE 16:  then - 10000)

Bob
----- Original Message ----- From: "Stephen Woodbridge" <[email protected]>
To: "PostGIS Users Discussion" <[email protected]>
Sent: Thursday, February 04, 2010 2:13 PM
Subject: Re: [postgis-users] Using CASE


Bob,

You sub-select need to be enclosed in parens like:

 ... - (select case ...) ...

-Steve

Bob Pawley wrote:
Hi
I've been attempting to use CASE to establish the spatial point in the following expression.
 Update p_id.image
set the_geom = (select st_translate(library.dgm_device.the_geom, st_x (st_centroid(p_id.p_id.othe_geom)) -
 st_x (st_centroid(library.dgm_device.ithe_geom)) ,
st_y (st_centroid(p_id.p_id.othe_geom)) - Select Case when p_id.devices.status = 'Pump #1'
 and p_id.devices.devices_id = '3614'
 then - 10000 -
 st_y (st_centroid(library.dgm_device.the_geom)))
from p_id.p_id, library.dgm_device, p_id.processes, processes_count, p_id.devices where library.dgm_device.description = 'In Line Pump'
 and library.dgm_device.orientation = ta_orientation
 and p_id.p_id.p_id_id = processes_count.p_id_id
 and p_id.p_id.process_id = p_id.processes.process_id
 and p_id.devices.devices_id = '3614'
 and  p_id.processes.fluid_id = p_id.devices.fluid_id) from p_id.devices
 where p_id.image.fluid_id = p_id.devices.fluid_id
 and p_id.devices.devices_id = '3614'
 and p_id.image.text_ = 'Pump #1'
 and p_id.image.device_id = '3614';
 I get - "ERROR:  syntax error at or near "Select"
LINE 14:  st_y (st_centroid(p_id.p_id.othe_geom)"
 Any help would be appreciated.
 Bob


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