6s
declare
start_time varchar:= time_extend->'start_time';
end_time varchar:= time_extend->'end_time';
west float:= space_extend->'west';
east float:= space_extend->'east';
south float:= space_extend->'south';
north float:= space_extend->'north';
min_r integer;
min_c integer;
query_space geometry;
begin
query_space := ST_MakeEnvelope(west,south,east,north,4326)::geometry;
--获得数据data 在时间范围内 在空间范围内
create temp table if not exists query_events on commit drop as
(
select sid, to_char(时间,'YYYYMMDDHH24') as p_time,glib.f_geodetic2quadtree(ST_X(geometry(地理位置))::numeric, ST_Y(geometry(地理位置))::numeric, layerth) as g_geohash
from crimestat.v_incidents
where
to_timestamp(start_time,'YYYYMMDDHH24')<=时间
and to_timestamp(end_time,'YYYYMMDDHH24')>=时间
and ST_Covers(query_space,geometry(地理位置)));
--依据 geohash 和 time聚类
create temp table if not exists cluster_events on commit drop as
(select query_events.p_time,query_events.g_geohash,count(sid) as counts from query_events group by query_events.g_geohash, query_events.p_time);
--依据geohash计算 从0开始的行列号
--获得原始行列号
create temp table if not exists rc_event_t on commit drop as
(select cluster_events.g_geohash, cluster_events.p_time, cluster_events.counts,(glib.f_quadtree2rowcol(cluster_events.g_geohash))[1] as row_t,(glib.f_quadtree2rowcol(cluster_events.g_geohash))[2] as col_t from cluster_events);
--return query select rc_event_t.g_geohash::varchar, rc_event_t.p_time::varchar, rc_event_t.counts::integer,row_t::integer,col_t::integer from rc_event_t;
min_r := (select min(rc_event_t.row_t) from rc_event_t);
min_c := (select min(rc_event_t.col_t) from rc_event_t);
--获得从0开始的行列号
return query select rc_event_t.g_geohash::varchar,rc_event_t.p_time::varchar, rc_event_t.counts::integer, rc_event_t.row_t-min_r as row_zero, rc_event_t.col_t-min_c as col_zero from rc_event_t order by rc_event_t.p_time,rc_event_t.g_geohash;
end;
5s 965ms//5s 768ms//5s969ms
declare
start_time varchar:= time_extend->'start_time';
end_time varchar:= time_extend->'end_time';
west float:= space_extend->'west';
east float:= space_extend->'east';
south float:= space_extend->'south';
north float:= space_extend->'north';
min_r integer;
min_c integer;
query_space geometry;
begin
query_space := ST_MakeEnvelope(west,south,east,north,4326)::geometry;
--获得数据data 在时间范围内 在空间范围内
create temp table if not exists query_events on commit drop as
(
select sid, to_char(时间,'YYYYMMDDHH24') as p_time,glib.f_geodetic2quadtree(ST_X(geometry(地理位置))::numeric, ST_Y(geometry(地理位置))::numeric, layerth) as g_geohash
from crimestat.v_incidents
where
to_timestamp(start_time,'YYYYMMDDHH24')<=时间
and to_timestamp(end_time,'YYYYMMDDHH24')>=时间
and ST_Covers(query_space,geometry(地理位置)));
--依据 geohash 和 time聚类,并获得原始行列号
create temp table if not exists cluster_events on commit drop as
(select query_events.p_time,query_events.g_geohash,count(sid) as counts,(glib.f_quadtree2rowcol(query_events.g_geohash))[1] as row_t,(glib.f_quadtree2rowcol(query_events.g_geohash))[2] as col_t from query_events group by query_events.g_geohash, query_events.p_time);
--依据geohash计算 从0开始的行列号
--获得原始行列号
--create temp table if not exists rc_event_t on commit drop as
--(select cluster_events.g_geohash, cluster_events.p_time, cluster_events.counts,(glib.f_quadtree2rowcol(cluster_events.g_geohash))[1] as row_t,(glib.f_quadtree2rowcol(cluster_events.g_geohash))[2] as col_t from cluster_events);
--return query select rc_event_t.g_geohash::varchar, rc_event_t.p_time::varchar, rc_event_t.counts::integer,row_t::integer,col_t::integer from rc_event_t;
min_r := (select min(cluster_events.row_t) from cluster_events);
min_c := (select min(cluster_events.col_t) from cluster_events);
--获得从0开始的行列号
return query select cluster_events.g_geohash::varchar,cluster_events.p_time::varchar,cluster_events.counts::integer,cluster_events.row_t-min_r as row_zero, cluster_events.col_t-min_c as col_zero from cluster_events order by cluster_events.p_time,cluster_events.g_geohash;
end;
5s 851ms //6s 230ms//5s 984ms//5s 848ms
declare
start_time varchar:= time_extend->'start_time';
end_time varchar:= time_extend->'end_time';
west float:= space_extend->'west';
east float:= space_extend->'east';
south float:= space_extend->'south';
north float:= space_extend->'north';
--min_r integer;
--min_c integer;
query_space geometry;
begin
query_space := ST_MakeEnvelope(west,south,east,north,4326)::geometry;
--获得数据data 在时间范围内 在空间范围内
create temp table if not exists query_events on commit drop as
(
select sid, to_char(时间,'YYYYMMDDHH24') as p_time,glib.f_geodetic2quadtree(ST_X(geometry(地理位置))::numeric, ST_Y(geometry(地理位置))::numeric, layerth) as g_geohash
from crimestat.v_incidents
where
to_timestamp(start_time,'YYYYMMDDHH24')<=时间
and to_timestamp(end_time,'YYYYMMDDHH24')>=时间
and ST_Covers(query_space,geometry(地理位置)));
--依据 geohash 和 time聚类,并获得原始行列号
create temp table if not exists cluster_events on commit drop as
(select query_events.p_time,query_events.g_geohash,count(sid) as counts,(glib.f_quadtree2rowcol(query_events.g_geohash))[1] as row_t,(glib.f_quadtree2rowcol(query_events.g_geohash))[2] as col_t from query_events group by query_events.g_geohash, query_events.p_time);
--依据geohash计算 从0开始的行列号
--获得原始行列号
--create temp table if not exists rc_event_t on commit drop as
--(select cluster_events.g_geohash, cluster_events.p_time, cluster_events.counts,(glib.f_quadtree2rowcol(cluster_events.g_geohash))[1] as row_t,(glib.f_quadtree2rowcol(cluster_events.g_geohash))[2] as col_t from cluster_events);
--return query select rc_event_t.g_geohash::varchar, rc_event_t.p_time::varchar, rc_event_t.counts::integer,row_t::integer,col_t::integer from rc_event_t;
--min_r := (select min(cluster_events.row_t) from cluster_events);
--min_c := (select min(cluster_events.col_t) from cluster_events);
--获得从0开始的行列号
return query select cluster_events.g_geohash::varchar,cluster_events.p_time::varchar,cluster_events.counts::integer,cluster_events.row_t-minrc.min_r as row_zero, cluster_events.col_t-minrc.min_c as col_zero from (select min(cluster_events.row_t) as min_r, min(cluster_events.col_t) as min_c from cluster_events) as minrc,cluster_events order by cluster_events.p_time,cluster_events.g_geohash;
end;
