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首頁(yè) 云數(shù)據(jù)庫(kù) RDS RDS PostgreSQL數(shù)據(jù)庫(kù) 時(shí)空引擎（GanosBase） Trajectory SQL參考 SQL參考手冊(cè) 事件函數(shù) ST_addEvent

ST_addEvent

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給軌跡增加一個(gè)事件。

語(yǔ)法

trajectory ST_addEvent(trajectory traj, integer event_type, timestamp event_time) ;

參數(shù)

參數(shù)名稱

描述

traj

軌跡對(duì)象。

event_type

事件類型。

event_time

事件時(shí)間戳。

描述

事件類型由用戶預(yù)先定義好，如 ‘1000’ 表示開(kāi)鎖， ‘2000’表示關(guān)鎖等。

示例

With traj AS (
  select '{"trajectory":{"version":1,"type":"STPOINT","leafcount":2,"start_time":"2010-01-01 11:30:00","end_time":"2010-01-01 12:30:00","spatial":"SRID=4326;LINESTRING(1 1,3 5)","timeline":["2010-01-01 11:30:00","2010-01-01 12:30:00"],"attributes":{"leafcount":2,"velocity":{"type":"integer","length":4,"nullable":true,"value":[1,null]},"speed":{"type":"float","length":8,"nullable":true,"value":[null,1.0]},"angel":{"type":"string","length":64,"nullable":true,"value":["test",null]}, "tngel2":{"type":"timestamp","length":8,"nullable":true,"value":["2010-01-01 12:30:00",null]},"bearing":{"type":"bool","length":1,"nullable":true,"value":[null,true]}}}}'::trajectory a)
Select st_addevent(a, 1, '2010-01-01 11:30:00' ) from traj;
                                                                                                                                                                                                                                                                                                                                                st_addevent                                                                                                                                                                                                                                                                                                                                                 
------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
 {"trajectory":{"version":1,"type":"STPOINT","leafcount":2,"start_time":"2010-01-01 11:30:00","end_time":"2010-01-01 12:30:00","spatial":"SRID=4326;LINESTRING(1 1,3 5)","timeline":["2010-01-01 11:30:00","2010-01-01 12:30:00"],"attributes":{"leafcount":2,"velocity":{"type":"integer","length":4,"nullable":true,"value":[1,null]},"speed":{"type":"float","length":8,"nullable":true,"value":[null,1.0]},"angel":{"type":"string","length":64,"nullable":true,"value":["test",null]},"tngel2":{"type":"timestamp","length":8,"nullable":true,"value":["2010-01-01 12:30:00",null]},"bearing":{"type":"bool","length":1,"nullable":true,"value":[null,true]}},"events":[{"1":"2010-01-01 11:30:00"}]}}
(1 row)