我使用postgis扩展编写了一个相当大的空间查询。查询工作得很好，但我想成为一个函数，因为更容易重用
概念：此查询采用空间启用的多边形宗地表，并计算来自各种其他多边形/点表的面积，以指示特定的土地类型特征。
目前，如果我希望此查询在不同的宗地多边形表上运行。 *我尝试使用左连接横向尝试只需插入新的parcels表一次，但查询花了更长的时间来运行该方法
我的问题是如何创建一个postgreSQL函数，我可以在其中输入一个表作为参数，然后创建一个名为输出的新表。
我找到了这篇文章https://dba.stackexchange.com/questions/141419/postgresql-pass-table-as-argument-in-function/141766
但我一点都没运气
这样的事情：
CREATE OR REPLACE FUNCTION hdc_report(out_name text,parcel_table regclass)
RETURNS TABLE(pcl_mun text,pclblock character varying, pcllot character varying,contaminated_sites_tier1_points text,contaminated_tier2_points text,
geol_mine_acres text,ecz_acres text,pre_act_const_no_slope_15_25_acres text,pre_act_sewer_service_acres text,
pre_act_water_buffers_acres text,pre_act_flood_acres text,pre_act_slopes_15_25_acres text,pre_act_slopes_25_acres text,
pre_act_streams_feet text,pre_act_waterbodies_acres text,total_acres text) AS
$$
begin
return query execute
'select b.pcl_mun,b.pclblock,b.pcllot,coalesce(q1.tier1,'0') as contaminated_sites_tier1_points,coalesce(q2.tier2,'0') as contaminated_tier2_points,
coalesce(q3.geol_m,'0') as geol_mine_acres,coalesce(q4.lucz2,'0') as ecz_acres,coalesce(q5.slp15_25,'0') as pre_act_const_no_slope_15_25_acres,
coalesce(q6.pre_sewer_service_area,'0') as pre_act_sewer_service_acres,coalesce(q7.water_buff,'0') as pre_act_water_buffers_acres,
coalesce(q8.flood_prone,'0') as pre_act_flood_acres,COALESCE(q9.preact_slopes_15_25,'0') as pre_act_slopes_15_25_acres,
COALESCE(q10.slopes25,'0') as pre_act_slopes_25_acres,COALESCE(q11.streams,'0') as pre_act_streams_feet,
COALESCE(q12.wb,'0') as pre_act_waterbodies_acres,sum(st_area(b.shape))/43560 as total_acres
from || parcel_table b
left join(select count(objectid_1)::text as tier1,pr.ssn,parcels.pcllot as pcllot,parcels.pclblock as pclblock
from || parcel_table as parcels join ralph.contaminated_sites_tier1points as pr ON st_intersects(parcels.shape,pr.shape)
group by parcels.pcllot,pr.ssn,pcllot,pclblock ) as q1
on b.pcllot=q1.pcllot and b.pclblock=q1.pclblock
left join(select count(objectid_1)::text as tier2,pr.ssn,parcels.pcllot as pcllot ,parcels.pclblock as pclblock
from || parcel_table as parcels join ralph.contaminated_tier2points as pr ON st_intersects(parcels.shape,pr.shape)
group by parcels.pcllot,pr.ssn,pcllot,pclblock ) as q2
on b.pcllot=q2.pcllot and b.pclblock=q2.pclblock
left join(select round(sum(st_area(st_intersection(pr.shape,parcels.shape)))::numeric,2) as geol_m,pr.mun,pr.county,parcels.pcllot as pcllot,parcels.pclblock as pclblock
from || parcel_table as parcels join ralph.geol_mine pr ON st_intersects(parcels.shape,pr.shape)
group by parcels.pcllot,pr.mun,pr.county,pcllot,pclblock ) as q3
ON b.pcllot = q3.pcllot and b.pclblock=q3.pclblock
left join(select round(sum(st_area(st_intersection(pr.shape,parcels.shape))/43560)::numeric,2) as lucz2,pr.ssn,parcels.pcllot as pcllot,parcels.pclblock as pclblock
from || parcel_table as parcels join ralph.lucz pr ON st_intersects(parcels.shape,pr.shape) where lucz_id = 'ECECSZ' or lucz_id = 'ECZ'
group by parcels.pcllot,pr.ssn,parcels.pcllot,pclblock ) as q4
ON b.pcllot = q4.pcllot and b.pclblock=q4.pclblock
left join(select round(sum(st_area(st_intersection(pr.shape,parcels.shape))/43560)::numeric,2) as slp15_25,parcels.pcllot as pcllot,parcels.pclblock as pclblock
from || parcel_table as parcels join ralph.pre_act_const_no_slp15_25 as pr on parcels.shape && pr.shape
group by parcels.pcllot,parcels.pcl_mun,pclblock ) as q5
ON b.pcllot = q5.pcllot and b.pclblock=q5.pclblock
left join(select round(sum(st_area(st_intersection(pr.shape,parcels.shape))/43560)::numeric,2) as pre_sewer_service_area,parcels.pcllot as pcllot,parcels.pclblock as pclblock
from || parcel_table as parcels join ralph.pre_act_sewer_service_area as pr on parcels.shape && pr.shape
group by parcels.pcllot,parcels.pcl_mun,pclblock ) as q6
ON b.pcllot = q6.pcllot and b.pclblock=q6.pclblock
left join(select round(sum(st_area(st_intersection(pr.shape,parcels.shape))/43560)::numeric,2) as water_buff,parcels.pcllot as pcllot,parcels.pclblock as pclblock
from || parcel_table as parcels join ralph.pre_act_water_buffers as pr on parcels.shape && pr.shape
group by parcels.pcllot,parcels.pcl_mun,pclblock ) as q7
ON b.pcllot = q7.pcllot and b.pclblock=q7.pclblock
left join(select round(sum(st_area(st_intersection(pr.shape,parcels.shape))/43560)::numeric,2) as flood_prone,parcels.pcllot as pcllot,parcels.pclblock as pclblock
from || parcel_table as parcels join ralph.preact_flood_prone_flood_hazard as pr on parcels.shape && pr.shape
group by parcels.pcllot,parcels.pcl_mun,pclblock ) as q8
ON b.pcllot = q8.pcllot and b.pclblock=q8.pclblock
left join(select round(sum(st_area(st_intersection(pr.shape,parcels.shape))/43560)::numeric,2) as preact_slopes_15_25,parcels.pcllot as pcllot,parcels.pclblock as pclblock
from || parcel_table as parcels join ralph.preact_slopes_15_25_percent as pr on parcels.shape && pr.shape
group by parcels.pcllot,parcels.pcl_mun,pclblock ) as q9
ON b.pcllot = q9.pcllot and b.pclblock=q9.pclblock
left join(select round(sum(st_area(st_intersection(pr.shape,parcels.shape))/43560)::numeric,2) as slopes25,parcels.pcllot as pcllot,parcels.pclblock as pclblock
from || parcel_table as parcels join ralph.preact_slopes_25_percent as pr on parcels.shape && pr.shape
group by parcels.pcllot,parcels.pcl_mun,pclblock ) as q10
ON b.pcllot = q10.pcllot and b.pclblock=q10.pclblock
left join(select round(sum(st_length(st_intersection(pr.shape,parcels.shape)))::numeric,2) as streams,parcels.pcllot as pcllot,parcels.pclblock as pclblock
from || parcel_table as parcels join ralph.preact_streams as pr on parcels.shape && pr.shape
group by parcels.pcllot,parcels.pcl_mun,pclblock ) as q11
ON b.pcllot = q11.pcllot and b.pclblock=q11.pclblock
left join(select round(sum(st_area(st_intersection(pr.shape,parcels.shape))/43560)::numeric,2) as wb,parcels.pcllot as pcllot,parcels.pclblock as pclblock
from || parcel_table as parcels join ralph.preact_water_bodies as pr on parcels.shape && pr.shape
group by parcels.pcllot,parcels.pcl_mun,pclblock ) as q12
ON b.pcllot = q12.pcllot and b.pclblock=q12.pclblock
group by b.pcl_mun,b.pclblock,b.pcllot,contaminated_sites_tier1_points,contaminated_tier2_points,geol_mine_acres,ecz_acres,
pre_act_const_no_slope_15_25_acres,pre_act_sewer_service_acres,pre_act_water_buffers_acres,pre_act_flood_acres,pre_act_slopes_15_25_acres,
pre_act_slopes_25_acres,pre_act_streams_feet,pre_act_waterbodies_acres;'
end
$$ LANGUAGE plpgsql;