[postgis-devel] overlaps left
Kevin Neufeld
kneufeld at refractions.net
Wed Jan 21 15:00:18 PST 2009
OK, I think what this should be saying is that &< returns true if it overlaps or is NOT to the right of ...
Kevin Neufeld wrote:
> Typo.. that was &<
>
> Kevin Neufeld wrote:
>> The docs said that &> returned true if the bounding boxes overlap OR
>> is to the left of ...
>>
>> That doesn't seem to be the case:
>> SELECT tbl1.column1, tbl2.column1,
>> tbl1.column2 && tbl2.column2 AS overlaps,
>> tbl1.column2 &< tbl2.column2 AS overlapsleft
>> FROM
>> ( VALUES
>> (1, 'LINESTRING( 1 2, 4 6 )'::geometry)) AS tbl1,
>> ( VALUES
>> (2, 'LINESTRING( 0 0, 3 3 )'::geometry)) AS tbl2;
>>
>> column1 | column1 | overlaps | overlapsleft
>> ---------+---------+----------+--------------
>> 1 | 2 | t | f
>> (1 row)
>>
>>
>> -- Kevin
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