軌道属性フィールドを指定できます。 この関数は、固定値に基づいて条件を満たす軌道点をフィルタリングし、フィルタリングされた属性フィールド値 (配列) を返します。
構文
int8[] ST_attrIntFilter(trajectory traj, cstring attr_field_name,cstring operator, int8 value);
int8[] ST_attrIntFilter(trajectory traj, cstring attr_field_name,cstring operator, int8 value1, int8 value2);パラメーター
パラメーター | 説明 |
traj | 軌道オブジェクトattr |
attr_field_name | 指定された属性名 |
演算子 | フィルター演算子: |
value, value1 | 属性の最小固定値 |
value2 | 属性の最大固定値 |
説明
整数型の属性フィールドのみがサポートされています。
例
create table traj(id integer, traj trajectory);
insert into traj(id, traj) values(1, ST_makeTrajectory('STPOINT'::leaftype, 'LINESTRING(-179.48077 51.72814,-179.46731 51.74634,-179.46502 51.74934,-179.46183 51.75378,-179.45943 51.75736,-179.45560 51.76273,-179.44845 51.77186,-179.43419 51.78977,-179.41259 51.81643,-179.41001 51.81941,-179.40751 51.82223,-179.40497 51.82505,-179.40242 51.82796,-179.39981 51.83095,-179.39734 51.83398,-179.39499 51.83709)'::geometry, ARRAY['2017-01-15 09:06:39'::timestamp,'2017-01-15 09:14:48','2017-01-15 09:13:39','2017-01-15 09:16:28','2017-01-15 09:19:48','2017-01-15 09:17:48','2017-01-15 09:23:19','2017-01-15 09:34:40','2017-01-15 09:30:28','2017-01-15 09:36:59','2017-01-15 09:38:09','2017-01-15 09:39:18','2017-01-15 09:40:40','2017-01-15 09:47:38','2017-01-15 21:18:30','2017-01-15 09:48:49'], '{"leafcount": 16, "attributes" : {"heading" : {"type": "integer", "length": 4, "nullable" : false,"value":[0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15]}}}'));
select st_attrIntFilter(traj, 'heading', '>', 5) from traj where id = 1;
st_attrintfilter
-----------------------------
{6,7,8,9,10,11,12,13,14,15}
(1 row)
select st_attrIntFilter(traj, 'heading', '>=', 5) from traj where id = 1;
st_attrintfilter
-------------------------------
{5,6,7,8,9,10,11,12,13,14,15}
(1 row)
select st_attrIntFilter(traj, 'heading', '<', 5) from traj where id = 1;
st_attrintfilter
------------------
{0,1,2,3,4}
(1 row)
select st_attrIntFilter(traj, 'heading', '<=', 5) from traj where id = 1;
st_attrintfilter
------------------
{0,1,2,3,4,5}
(1 row)
select st_attrIntFilter(traj, 'heading', '=', 5) from traj where id = 1;
st_attrintfilter
------------------
{5}
(1 row)
select st_attrIntFilter(traj, 'heading', '!=', 5) from traj where id = 1;
st_attrintfilter
---------------------------------------
{0,1,2,3,4,6,7,8,9,10,11,12,13,14,15}
(1 row)
select st_attrIntFilter(traj, 'heading', '()', 5,8) from traj where id = 1;
st_attrintfilter
------------------
{6,7}
(1 row)
select st_attrIntFilter(traj, 'heading', '(]', 5,8) from traj where id = 1;
st_attrintfilter
------------------
{6,7,8}
(1 row)
select st_attrIntFilter(traj, 'heading', '[)', 5,8) from traj where id = 1;
st_attrintfilter
------------------
{5,6,7}
(1 row)
select st_attrIntFilter(traj, 'heading', '[]', 5,8) from traj where id = 1;
st_attrintfilter
------------------
{5,6,7,8}
(1 row)