2009/7/11 Tamas Szekeres :
> Jorge,
>
> I think this driver is in a special situation comparing to the file based
> raster data sources, that is: we should minimize the round trips to the
> server as much as possible which is costly. Therefore in addition to write
> IReadBlock correctly (required t
Jorge,
I think this driver is in a special situation comparing to the file based
raster data sources, that is: we should minimize the round trips to the
server as much as possible which is costly. Therefore in addition to write
IReadBlock correctly (required to fetch a single row in each call or
m
2009/7/11 Frank Warmerdam :
> Jorge Arévalo wrote:
>>
>> So, clearly, I have a mistake. Think in a table with tiles of 100x100
>> px. We have 30 tiles. When I create RasterBands, their block size will
>> be 100x100. So, IReadBlock(0, 0, bufffer) indicates the block going
>> from (0, 0) to (100, 100
Jorge Arévalo wrote:
So, clearly, I have a mistake. Think in a table with tiles of 100x100
px. We have 30 tiles. When I create RasterBands, their block size will
be 100x100. So, IReadBlock(0, 0, bufffer) indicates the block going
from (0, 0) to (100, 100). Does it mean that the block from (0, 0)
On Sat, Jul 11, 2009 at 1:32 AM, Tamas Szekeres wrote:
>
>
> 2009/7/11 Frank Warmerdam
>>
>> Jorge Arévalo wrote:
>>>
>>> Hello,
>>>
>>> 2009/7/10 Tamas Szekeres :
Jorge,
I'm a bit hesitant to think using a server cursor would be the best
approach
here. Could you expl
2009/7/11 Frank Warmerdam
> Jorge Arévalo wrote:
>
>> Hello,
>>
>> 2009/7/10 Tamas Szekeres :
>>
>>> Jorge,
>>>
>>> I'm a bit hesitant to think using a server cursor would be the best
>>> approach
>>> here. Could you explain why is this needed?
>>>
>>
>> Yes. As now I'm working basically with reg
Jorge Arévalo wrote:
Hello,
2009/7/10 Tamas Szekeres :
Jorge,
I'm a bit hesitant to think using a server cursor would be the best approach
here. Could you explain why is this needed?
Yes. As now I'm working basically with regularly tiled coverages, an
operation like SELECT rast FROM table gi
Hello,
2009/7/10 Tamas Szekeres :
> Jorge,
>
> I'm a bit hesitant to think using a server cursor would be the best approach
> here. Could you explain why is this needed?
Yes. As now I'm working basically with regularly tiled coverages, an
operation like SELECT rast FROM table gives me all the til
Jorge,
I'm a bit hesitant to think using a server cursor would be the best approach
here. Could you explain why is this needed?
I my understanding each IReadBlock would trigger a normal "SELECT" without
the cursor, this will give you all the data at once, just like FETCH ALL.
This select would in
Hello,
2009/7/10 Frank Warmerdam :
> Jorge Arévalo wrote:
>>
>> Hello,
>>
>> Context: GDAL WKTRaster Driver. When creating Dataset, I declare a
>> cursor to read all the rows (tiles) of a table with a raster column
>> (DECLARE cursor CURSOR FOR SELECT * FROM TABLE). The RasterBand should
>> read o
Jorge Arévalo wrote:
Hello,
Context: GDAL WKTRaster Driver. When creating Dataset, I declare a
cursor to read all the rows (tiles) of a table with a raster column
(DECLARE cursor CURSOR FOR SELECT * FROM TABLE). The RasterBand should
read one of the rows' band
Question 1: The cursor is created
Hello,
Context: GDAL WKTRaster Driver. When creating Dataset, I declare a
cursor to read all the rows (tiles) of a table with a raster column
(DECLARE cursor CURSOR FOR SELECT * FROM TABLE). The RasterBand should
read one of the rows' band
Question 1: The cursor is created during the Dataset crea
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