关于postgreSQL 数据库时间相关查询语句

àì夳堔傛蜴生んèń 2022-12-11 15:23 288阅读 0赞

## 个人记载 方便查找 ##

创建自增ID

CREATE SEQUENCE upms_log_id_seq START 10;

获取当前时间（精确到时分秒）：

select to_char((select  now()),'yyyy-mm-dd hh24:mm:ss')::timestamp

获取今天、昨天、上周一、上周日、本周一、本月、上月、今年、去年时间：

--今天
    select to_char(current_date,'yyyy-MM-dd')::timestamp
    
    --昨天
    select to_char(current_date-1,'yyyy-MM-dd')::timestamp
    
    --获取上周一时间 00:00:00
    SELECT CURRENT_DATE - ( EXTRACT ( dow FROM CURRENT_DATE ) - 1 || ' day' ) :: INTERVAL - INTERVAL '7 day'
    
    --获取上周日时间 23:59:59
    SELECT CURRENT_DATE - ( EXTRACT ( dow FROM CURRENT_DATE ) - 1 || ' day' ) :: INTERVAL - INTERVAL '1 s'
    
    --获取本周一时间 00:00:00
    SELECT CURRENT_DATE - ( EXTRACT ( dow FROM CURRENT_DATE ) - 1 || ' day' ) :: INTERVAL
    
    --本月
    select to_char(current_date,'yyyy-MM')::timestamp
    
    --上月
    select to_char((select  now() - interval '1 month'),'yyyy-mm')::timestamp
    
    --本年
    select to_char((select  now() ),'yyyy')::timestamp
    
    --去年
    select to_char((select  now() - interval '1 years'),'yyyy')::timestamp

查询指定时间字段今天、昨天、本月、上月、今年、去年表数据：

--今天
    SELECT *
    FROM
    	表名 AS n 
    WHERE
    	to_char( n.时间字段名, 'yyyy-mm-dd' ) =  to_char( CURRENT_DATE, 'yyyy-MM-dd' );
    
    --昨天
    SELECT *
    FROM
    	表名 AS n 
    WHERE
    	to_char( n.时间字段名, 'yyyy-MM-dd' ) = to_char( CURRENT_DATE - 1, 'yyyy-MM-dd' );
    
    --本月
    SELECT *
    FROM
    	表名 AS n 
    WHERE
    	to_char( n.时间字段名, 'yyyy-mm' ) = to_char( ( SELECT now( ) AS TIMESTAMP ), 'yyyy-mm' );
    
    --上月
    SELECT *
    FROM
    	表名 AS n 
    WHERE
    	to_char( n.时间字段名, 'yyyy-mm' ) = to_char( ( SELECT now( ) - INTERVAL '1 month' ), 'yyyy-mm' );
    
    --本年
    SELECT *
    FROM
    	表名 AS n 
    WHERE
    	to_char( n.时间字段名, 'yyyy' ) = to_char( ( SELECT now( ) ), 'yyyy' );
    
    --去年
    SELECT *
    FROM
    	表名 AS n 
    WHERE
    	to_char( n.时间字段名, 'yyyy' ) = to_char( ( SELECT now( ) - INTERVAL '1 years' ), 'yyyy' );

查询上周、上季度的数据：

--查询上周数据
    SELECT *
    FROM 表名
    WHERE
        时间字段名   BETWEEN
    	current_timestamp - (extract (dow from current_timestamp) - 1 || ' day')::interval - interval '7 day'
    	AND
    	current_timestamp - (extract (dow from current_timestamp) - 1 || ' day')::interval - interval '1 day'
    
    --查询上季度数据
    SELECT *
    FROM 表名
    WHERE
    	时间字段名 BETWEEN
        date_trunc('quarter',now() + interval '-3 month') 
        AND
        date_trunc('quarter',now() + interval '-3 month') + interval '3 month'

按照天、月、年求和：

--按天求和
    SELECT
    to_char( 时间字段, 'YYYY-mm-dd' ) AS time, SUM ( 求和字段 )
    FROM
    表名
    GROUP BY time
    
    --按月求和
    SELECT
    to_char( 时间字段, 'YYYY-mm' ) AS time, SUM ( 求和字段 )
    FROM
    表名
    GROUP BY time
    
    --按年求和
    SELECT
    to_char( 时间字段, 'YYYY' ) AS time, SUM ( 求和字段 )
    FROM
    表名
    GROUP BY time

查询字段为空，赋默认值0：

COALESCE(字段名,0)

查询为null和不为null数据：

--查询某字段为空的数据
    SELECT *
    FROM 表名
    WHERE　字段名 IS NULL
    
    --查询某字段不为空的数据
    SELECT *
    FROM 表名
    WHERE　字段名 IS NOT NULL

空间数据库相关

添加空间扩展

CREATE EXTENSION postgis;
    CREATE EXTENSION pgrouting;
    CREATE EXTENSION postgis_topology;
    CREATE EXTENSION fuzzystrmatch;
    CREATE EXTENSION postgis_tiger_geocoder;
    CREATE EXTENSION address_standardizer;

postGIS的SRID更新

select UpdateGeometrySRID('表名', 'geom', 4326);
    
    --查询SRID
    select st_srid(geom) from table;
    
    
    --坐标系转换 4326转3857
    UPDATE colliery SET geom = ST_Transform ( st_geometryfromtext ( ST_AsText ( geom ), 4326 ), 3857 );

postgis火星坐标系转换

示例：

--GCJ02转WGS84
    select geoc_gcj02towgs84(geom) from test_table
    --WGS84转GCJ02
    select geoc_wgs84togcj02(geom) from test_table
    --WGS84转BD09
    select geoc_wgs84tobd09(geom) from test_table
    --BD09转WGS84
    select geoc_bd09towgs84(geom) from test_table
    --GCJ02转BD09
    select geoc_gcj02tobd09(geom) from test_table
    --BD09转GCJ02
    select geoc_bd09togcj02(geom) from test_table

sql代码：

CREATE OR REPLACE FUNCTION "public"."geoc_bd09towgs84_multipolygon"("source_geom" "public"."geometry")
      RETURNS "public"."geometry" AS $BODY$
    DECLARE
        target_parts    geometry[];
        single_polygon  geometry;
        single_polygon_trans  geometry;
        final_geom      geometry;
    
    BEGIN
        IF ST_GeometryType(source_geom) != 'ST_MultiPolygon' THEN
            RETURN null;
        END IF;
        FOR single_polygon IN SELECT (ST_Dump($1)).geom LOOP
            single_polygon_trans := geoc_bd09towgs84_polygon(single_polygon); 
            target_parts := array_append(target_parts,single_polygon_trans);
        END LOOP;
        
        SELECT st_multi(ST_Union(target_parts)) INTO final_geom;
        RETURN final_geom;
    END;
    $BODY$
      LANGUAGE plpgsql VOLATILE
      COST 100;
    CREATE OR REPLACE FUNCTION "public"."geoc_bd09towgs84_point"("geom" "public"."geometry")
      RETURNS "public"."geometry" AS $BODY$
    DECLARE
      x       numeric; 
    	y       numeric; 
    	gcj_point  geometry;
    	wgs_point  geometry;
    
    BEGIN
        if st_geometrytype(geom) != 'ST_Point' then
          return null;
        end if;
        x := st_x(geom);
        y := st_y(geom);
        if (geoc_is_in_china_bbox(x, y) = false) then
          return geom;
        end if;
        gcj_point = geoc_bd09togcj02_point(geom);
    	  wgs_point = geoc_gcj02towgs84_point(gcj_point);
    	  return wgs_point;
    
    END;
    $BODY$
      LANGUAGE plpgsql VOLATILE
      COST 100;
    CREATE OR REPLACE FUNCTION "public"."geoc_bd09towgs84_polygon"("source_geom" "public"."geometry")
      RETURNS "public"."geometry" AS $BODY$
    DECLARE
        target_parts    geometry[];
        source_npoints  integer;
        single_line     geometry;
        single_line_trans geometry;
        single_polygon  geometry;
        final_geom      geometry;
    
    BEGIN
        IF ST_GeometryType(source_geom) != 'ST_Polygon' THEN
            RETURN null;
        END IF;
    
        FOR single_polygon IN SELECT ST_ExteriorRing ((st_dumprings($1)).geom) as geom LOOP				
            source_npoints := ST_NPoints(single_polygon); 
            single_line  := ST_RemovePoint(single_polygon, source_npoints - 1);  
            single_line_trans := geoc_bd09towgs84_line(single_line);  
            target_parts := array_append(target_parts, ST_AddPoint(single_line_trans, ST_PointN(single_line_trans, 1)));  
        END LOOP;
        SELECT ST_MakePolygon(target_parts[1], target_parts[2:array_upper(target_parts, 1)]) INTO final_geom; 
        RETURN final_geom;
    
    END;
    $BODY$
      LANGUAGE plpgsql VOLATILE
      COST 100;
    CREATE OR REPLACE FUNCTION "public"."geoc_cgcs2000tobd09"("geom" "public"."geometry")
      RETURNS "public"."geometry" AS $BODY$
    DECLARE
    BEGIN
    IF st_srid(geom) != '4490' THEN
            RETURN null;
    end if;
    return geoc_wgs84tobd09(st_transform(st_setsrid(geom,4490),4326));
    END;
    $BODY$
      LANGUAGE plpgsql VOLATILE
      COST 100;
    CREATE OR REPLACE FUNCTION "public"."geoc_cgcs2000togcj02"("geom" "public"."geometry")
      RETURNS "public"."geometry" AS $BODY$
    DECLARE
    BEGIN
    IF st_srid(geom) != '4490' THEN
            RETURN null;
    end if;
    return geoc_wgs84togcj02(st_transform(st_setsrid(geom,4490),4326));
    END;
    $BODY$
      LANGUAGE plpgsql VOLATILE
      COST 100;
    CREATE OR REPLACE FUNCTION "public"."geoc_delta"("lon" numeric, "lat" numeric)
      RETURNS "pg_catalog"."jsonb" AS $BODY$
    DECLARE
        ret             varchar;
        dLon            numeric;
        dlat            numeric;
        radLat          numeric;
        magic           numeric;
        sqrtMagic       numeric;
        ee              numeric;
        a               numeric;
    BEGIN
        ee := 0.006693421622965823;
        a  := 6378245;
        dLon := geoc_transform_lon(lon - 105, lat - 35);
        dLat := geoc_transform_lat(lon - 105, lat - 35);
        radLat := lat / 180 * pi();
        magic = sin(radLat);
    
        magic = 1 - ee * magic * magic;
    
        sqrtMagic := sqrt(magic);
        dLon = (dLon * 180) / (a / sqrtMagic * cos(radLat) * pi());
        dLat = (dLat * 180) / ((a * (1 - ee)) / (magic * sqrtMagic) * pi());
        ret :='['||dLon||','||dLat||']';
    	return ret::jsonb;
    END;
    $BODY$
      LANGUAGE plpgsql VOLATILE
      COST 100;
    CREATE OR REPLACE FUNCTION "public"."geoc_gcj02tobd09"("geom" "public"."geometry")
      RETURNS "public"."geometry" AS $BODY$
    DECLARE
    BEGIN
    IF st_srid(geom) != '4490' and  st_srid(geom) != '4326'THEN
            RETURN null;
    end if;
    case ST_GeometryType(geom)
        when 'ST_LineString' then 
    			return geoc_gcj02tobd09_line(geom);
    	when 'ST_MultiLineString' then 
    		return geoc_gcj02tobd09_multiline(geom);
    	when 'ST_Point' then 
    		return geoc_gcj02tobd09_point(geom);
    	when 'ST_MultiPoint' then 
    			return geoc_gcj02tobd09_multipoint(geom);
    	when 'ST_Polygon' then 
    			return geoc_gcj02tobd09_polygon(geom);
    	when 'ST_MultiPolygon' then
    		return geoc_gcj02tobd09_multipolygon(geom); 
    	ELSE
        	RETURN null;
    END CASE;
    END;
    $BODY$
      LANGUAGE plpgsql VOLATILE
      COST 100;
    CREATE OR REPLACE FUNCTION "public"."geoc_gcj02tobd09_line"("geom" "public"."geometry")
      RETURNS "public"."geometry" AS $BODY$
    DECLARE
    		p_p     geometry;
    		p_t     geometry;
    		z_t     geometry;
    		i       int;
    BEGIN
        i:=1;
    	while i <= st_npoints(geom) LOOP
    		p_p := st_pointn(geom,i);
    		p_t := geoc_gcj02tobd09_point(p_p);
    		geom:=st_setpoint(geom,i-1,p_t);
    		i:=i+1;
    	end LOOP;
    	return geom;
    
    END;
    $BODY$
      LANGUAGE plpgsql VOLATILE
      COST 100;
    CREATE OR REPLACE FUNCTION "public"."geoc_gcj02tobd09_multiline"("geom" "public"."geometry")
      RETURNS "public"."geometry" AS $BODY$
    DECLARE
    		i                 geometry;
    		transform_i       geometry;
    		multiArr          geometry[]; 
    	
    BEGIN
        multiArr:='{}'::geometry[];
    	for i in EXECUTE $Q$ select (st_dump($1)).geom  $Q$ using geom LOOP
    	  	transform_i :=geoc_gcj02tobd09_line(i);
    		multiArr := array_append(multiArr, transform_i);
    	end LOOP;
    	return st_multi(ST_Union(multiArr));
    END;
    $BODY$
      LANGUAGE plpgsql VOLATILE
      COST 100;
    CREATE OR REPLACE FUNCTION "public"."geoc_gcj02tobd09_multipoint"("geom" "public"."geometry")
      RETURNS "public"."geometry" AS $BODY$
    DECLARE
    		i                 geometry;
    		transform_i       geometry;
    		multiArr          geometry[]; 
    	
    BEGIN
        multiArr:='{}'::geometry[];
    	for i in EXECUTE $Q$ select (st_dump($1)).geom  $Q$ using geom LOOP
    	  	transform_i :=geoc_gcj02tobd09_point(i);
    		multiArr := array_append(multiArr, transform_i);
    	end LOOP;
    	return st_multi(ST_Union(multiArr));
    END;
    $BODY$
      LANGUAGE plpgsql VOLATILE
      COST 100;
    CREATE OR REPLACE FUNCTION "public"."geoc_gcj02tobd09_multipolygon"("source_geom" "public"."geometry")
      RETURNS "public"."geometry" AS $BODY$
    DECLARE
        target_parts    geometry[];
        single_polygon  geometry;
        single_polygon_trans  geometry;
        final_geom      geometry;
    
    BEGIN
        IF ST_GeometryType(source_geom) != 'ST_MultiPolygon' THEN
            RETURN null;
        END IF;
            FOR single_polygon IN SELECT (ST_Dump($1)).geom LOOP
                    single_polygon_trans := geoc_gcj02tobd09_polygon(single_polygon); 
                    target_parts := array_append(target_parts,single_polygon_trans);
            END LOOP;
    				
            SELECT st_multi(ST_Union(target_parts)) INTO final_geom;
            RETURN final_geom;
    END;
    $BODY$
      LANGUAGE plpgsql VOLATILE
      COST 100;
    CREATE OR REPLACE FUNCTION "public"."geoc_gcj02tobd09_point"("geom" "public"."geometry")
      RETURNS "public"."geometry" AS $BODY$
    DECLARE
    z         double precision; 
    theta     double precision; 
    x_pi      double precision:=3.14159265358979324 * 3000.0 / 180.0; 
    lon       numeric; 
    lat       numeric; 
    bd_point  geometry;
    
    BEGIN
        if st_geometrytype(geom) != 'ST_Point' then
          return null;
        end if;
        lon := st_x(geom);
        lat := st_y(geom);
        if geoc_is_in_china_bbox(lon, lat) = false THEN 
          return geom;
        end if;
        z:= sqrt(power(lon,2) + power(lat,2)) + 0.00002 * sin(lat * x_pi); 
        theta:= atan2(lat, lon) + 0.000003 * cos(lon * x_pi); 
    	bd_point:=ST_SetSRID(ST_MakePoint(z * cos(theta) + 0.0065,z * sin(theta) + 0.006),4326); 
    	  return bd_point; 
    
    END;
    $BODY$
      LANGUAGE plpgsql VOLATILE
      COST 100;
    CREATE OR REPLACE FUNCTION "public"."geoc_gcj02tobd09_polygon"("source_geom" "public"."geometry")
      RETURNS "public"."geometry" AS $BODY$
    DECLARE
        target_parts    geometry[];
        source_npoints  integer;
        single_line     geometry;
        single_line_trans geometry;
        single_polygon  geometry;
        final_geom      geometry;
    
    BEGIN
        IF ST_GeometryType(source_geom) != 'ST_Polygon' THEN
            RETURN null;
        END IF;
    
        FOR single_polygon IN SELECT ST_ExteriorRing ((st_dumprings($1)).geom) as geom LOOP				
            source_npoints := ST_NPoints(single_polygon); 
            single_line  := ST_RemovePoint(single_polygon, source_npoints - 1);  
            single_line_trans := geoc_gcj02tobd09_line(single_line);  
            target_parts := array_append(target_parts, ST_AddPoint(single_line_trans, ST_PointN(single_line_trans, 1)));  
        END LOOP;
        SELECT ST_MakePolygon(target_parts[1], target_parts[2:array_upper(target_parts, 1)]) INTO final_geom;
        RETURN final_geom;
    
    END;
    $BODY$
      LANGUAGE plpgsql VOLATILE
      COST 100;
    CREATE OR REPLACE FUNCTION "public"."geoc_gcj02tocgcs2000"("geom" "public"."geometry")
      RETURNS "public"."geometry" AS $BODY$
    DECLARE
    BEGIN
    IF st_srid(geom) != '4490' THEN
            RETURN null;
    end if;
    return st_transform(st_setsrid(geoc_gcj02towgs84(geom),4326),4490);
    END;
    $BODY$
      LANGUAGE plpgsql VOLATILE
      COST 100;
    CREATE OR REPLACE FUNCTION "public"."geoc_gcj02towgs84"("geom" "public"."geometry")
      RETURNS "public"."geometry" AS $BODY$
    DECLARE
    BEGIN
    IF st_srid(geom) != '4490' and  st_srid(geom) != '4326'THEN
            RETURN null;
    end if;
    case ST_GeometryType(geom)
        when 'ST_LineString' then 
    			return geoc_gcj02towgs84_line(geom);
    	when 'ST_MultiLineString' then 
    		return geoc_gcj02towgs84_multiline(geom);
    	when 'ST_Point' then 
    		return geoc_gcj02towgs84_point(geom);
    	when 'ST_MultiPoint' then 
    			return geoc_gcj02towgs84_multipoint(geom);
    	when 'ST_Polygon' then 
    			return geoc_gcj02towgs84_polygon(geom);
    	when 'ST_MultiPolygon' then
    		return geoc_gcj02towgs84_multipolygon(geom); 
    	ELSE
        	RETURN null;
    END CASE;
    END;
    $BODY$
      LANGUAGE plpgsql VOLATILE
      COST 100;
    CREATE OR REPLACE FUNCTION "public"."geoc_gcj02towgs84_line"("geom" "public"."geometry")
      RETURNS "public"."geometry" AS $BODY$
    DECLARE
    		p_p     geometry;
    		p_t     geometry;
    		z_t     geometry;
    		i       int;
    BEGIN
        i:=1;
    	while i <= st_npoints(geom) LOOP
    		p_p := st_pointn(geom,i);
    		p_t := geoc_gcj02towgs84_point(p_p);
    		geom:=st_setpoint(geom,i-1,p_t);
    		i:=i+1;
    	end LOOP;
    	return geom;
    
    END;
    $BODY$
      LANGUAGE plpgsql VOLATILE
      COST 100;
    CREATE OR REPLACE FUNCTION "public"."geoc_gcj02towgs84_multiline"("geom" "public"."geometry")
      RETURNS "public"."geometry" AS $BODY$
    DECLARE
    		i                 geometry;
    		transform_i       geometry;
    		multiArr          geometry[]; 
    	
    BEGIN
        multiArr:='{}'::geometry[];
    	for i in EXECUTE $Q$ select (st_dump($1)).geom  $Q$ using geom LOOP
    	  	transform_i :=geoc_gcj02towgs84_line(i);
    		multiArr := array_append(multiArr, transform_i);
    	end LOOP;
    	return st_multi(ST_Union(multiArr));
    END;
    $BODY$
      LANGUAGE plpgsql VOLATILE
      COST 100;
    CREATE OR REPLACE FUNCTION "public"."geoc_gcj02towgs84_multipoint"("geom" "public"."geometry")
      RETURNS "public"."geometry" AS $BODY$
    DECLARE
    		i                 geometry;
    		transform_i       geometry;
    		multiArr          geometry[]; 
    	
    BEGIN
        multiArr:='{}'::geometry[];
    	for i in EXECUTE $Q$ select (st_dump($1)).geom  $Q$ using geom LOOP
    	  	transform_i :=geoc_gcj02towgs84_point(i);
    		multiArr := array_append(multiArr, transform_i);
    	end LOOP;
    	return st_multi(ST_Union(multiArr));
    END;
    $BODY$
      LANGUAGE plpgsql VOLATILE
      COST 100;
    CREATE OR REPLACE FUNCTION "public"."geoc_gcj02towgs84_multipolygon"("source_geom" "public"."geometry")
      RETURNS "public"."geometry" AS $BODY$
    DECLARE
        target_parts    geometry[];
        single_polygon  geometry;
        single_polygon_trans  geometry;
        final_geom      geometry;
    
    BEGIN
        IF ST_GeometryType(source_geom) != 'ST_MultiPolygon' THEN
            RETURN null;
        END IF;
            FOR single_polygon IN SELECT (ST_Dump($1)).geom LOOP
                    single_polygon_trans := geoc_gcj02towgs84_polygon(single_polygon); 
                    target_parts := array_append(target_parts,single_polygon_trans);
            END LOOP;
    				
            SELECT st_multi(ST_Union(target_parts)) INTO final_geom;
            RETURN final_geom;
    END;
    $BODY$
      LANGUAGE plpgsql VOLATILE
      COST 100;
    CREATE OR REPLACE FUNCTION "public"."geoc_gcj02towgs84_point"("geom" "public"."geometry")
      RETURNS "public"."geometry" AS $BODY$
    DECLARE
        tempPoint  numeric[];
        wgsLon     numeric;
        wgsLat     numeric;
        lon        numeric;
        lat        numeric;
    BEGIN
        if st_geometrytype(geom) != 'ST_Point' then
          return null;
        end if;
        lon := st_x(geom);
        lat := st_y(geom);
        if geoc_is_in_china_bbox(lon, lat) = false THEN 
          return geom;
        end if;
    
        tempPoint := geoc_wgs84togcj02(ARRAY[lon, lat]);
        wgsLon := lon*2 - tempPoint[1];
        wgsLat := lat*2 - tempPoint[2];
        return st_makepoint(wgsLon,wgsLat);
    END;
    $BODY$
      LANGUAGE plpgsql VOLATILE
      COST 100;
    CREATE OR REPLACE FUNCTION "public"."geoc_gcj02towgs84_polygon"("source_geom" "public"."geometry")
      RETURNS "public"."geometry" AS $BODY$
    DECLARE
        target_parts    geometry[];
        source_npoints  integer;
        single_line     geometry;
        single_line_trans geometry;
        single_polygon  geometry;
        final_geom      geometry;
    
    BEGIN
        IF ST_GeometryType(source_geom) != 'ST_Polygon' THEN
            RETURN null;
        END IF;
    
        FOR single_polygon IN SELECT ST_ExteriorRing ((st_dumprings($1)).geom) as geom LOOP				
            source_npoints := ST_NPoints(single_polygon); 
            single_line  := ST_RemovePoint(single_polygon, source_npoints - 1);  
            single_line_trans := geoc_gcj02towgs84_line(single_line);  
            target_parts := array_append(target_parts, ST_AddPoint(single_line_trans, ST_PointN(single_line_trans, 1)));  
        END LOOP;
        SELECT ST_MakePolygon(target_parts[1], target_parts[2:array_upper(target_parts, 1)]) INTO final_geom; 
        RETURN final_geom;
    
    END;
    $BODY$
      LANGUAGE plpgsql VOLATILE
      COST 100;
    CREATE OR REPLACE FUNCTION "public"."geoc_is_in_china_bbox"("lon" numeric, "lat" numeric)
      RETURNS "pg_catalog"."bool" AS $BODY$
    DECLARE
    BEGIN
        
        return lon >= 72.004 and lon <= 137.8347 and lat >= 0.8293 and lat <= 55.8271;
    END;
    $BODY$
      LANGUAGE plpgsql VOLATILE
      COST 100;
    CREATE OR REPLACE FUNCTION "public"."geoc_transform_lat"("x" numeric, "y" numeric)
      RETURNS "pg_catalog"."numeric" AS $BODY$
    DECLARE
    ret   numeric;
    BEGIN
        ret := -100 + 2 * x + 3 * y + 0.2 * y * y + 0.1 * x * y + 0.2 * sqrt(abs(x));
        ret := ret + (20 * sin(6 * x * PI()) + 20 * sin(2 * x * PI())) * 2 / 3;
        ret := ret +(20 * sin(y * PI()) + 40 * sin(y / 3 * PI())) * 2 / 3;
        ret := ret +(160 * sin(y / 12 * PI()) + 320 * sin(y * PI() / 30)) * 2 / 3;
        return ret;
    
    END;
    $BODY$
      LANGUAGE plpgsql VOLATILE
      COST 100;
    CREATE OR REPLACE FUNCTION "public"."geoc_transform_lon"("x" numeric, "y" numeric)
      RETURNS "pg_catalog"."numeric" AS $BODY$
    DECLARE
        ret   numeric;
    BEGIN
        ret := 300 + x + 2 * y + 0.1 * x * x + 0.1 * x * y + 0.1 * sqrt(abs(x));
        ret :=ret + (20 * sin(6 * x * pi()) + 20 * sin(2 * x * pi())) * 2 / 3;
        ret :=ret + (20 * sin(x * pi()) + 40 * sin(x / 3 * pi())) * 2 / 3;
        ret :=ret + (150 * sin(x / 12 * pi()) + 300 * sin(x / 30 * pi())) * 2 / 3;
        return ret;
    END;
    $BODY$
      LANGUAGE plpgsql VOLATILE
      COST 100;
    CREATE OR REPLACE FUNCTION "public"."geoc_wgs84tobd09"("geom" "public"."geometry")
      RETURNS "public"."geometry" AS $BODY$
    DECLARE
    BEGIN
    IF st_srid(geom) != '4490' and  st_srid(geom) != '4326'THEN
            RETURN null;
    end if;
    case ST_GeometryType(geom)
      when 'ST_LineString' then 
    		return geoc_wgs84tobd09_line(geom);
    	when 'ST_MultiLineString' then 
    		return geoc_wgs84tobd09_multiline(geom);
    	when 'ST_Point' then 
    		return geoc_wgs84tobd09_point(geom);
    	when 'ST_MultiPoint' then 
    		return geoc_wgs84tobd09_multipoint(geom);
    	when 'ST_Polygon' then 
    		return geoc_wgs84tobd09_polygon(geom);
    	when 'ST_MultiPolygon' then
    		return geoc_wgs84tobd09_multipolygon(geom); 
    	ELSE
        	RETURN null;
    END CASE;
    END;
    $BODY$
      LANGUAGE plpgsql VOLATILE
      COST 100;
    CREATE OR REPLACE FUNCTION "public"."geoc_wgs84tobd09_line"("geom" "public"."geometry")
      RETURNS "public"."geometry" AS $BODY$
    DECLARE
    		p_p     geometry;
    		p_t     geometry;
    		z_t     geometry;
    		i       int;
    BEGIN
        i:=1;
    	while i <= st_npoints(geom) LOOP
    		p_p := st_pointn(geom,i);
    		p_t := geoc_wgs84tobd09_point(p_p);
    		geom:=st_setpoint(geom,i-1,p_t);
    		i:=i+1;
    	end LOOP;
    	return geom;
    
    END;
    $BODY$
      LANGUAGE plpgsql VOLATILE
      COST 100;
    CREATE OR REPLACE FUNCTION "public"."geoc_wgs84tobd09_multiline"("geom" "public"."geometry")
      RETURNS "public"."geometry" AS $BODY$
    DECLARE
    		i                 geometry;
    		transform_i       geometry;
    		multiArr          geometry[]; 
    	
    BEGIN
        multiArr:='{}'::geometry[];
    	for i in EXECUTE $Q$ select (st_dump($1)).geom  $Q$ using geom LOOP
    	  	transform_i :=geoc_wgs84tobd09_line(i);
    		multiArr := array_append(multiArr, transform_i);
    	end LOOP;
    	return st_multi(ST_Union(multiArr));
    END;
    $BODY$
      LANGUAGE plpgsql VOLATILE
      COST 100;
    CREATE OR REPLACE FUNCTION "public"."geoc_wgs84tobd09_multipoint"("geom" "public"."geometry")
      RETURNS "public"."geometry" AS $BODY$
    DECLARE
    		i                 geometry;
    		transform_i       geometry;
    		multiArr          geometry[]; 
    	
    BEGIN
        multiArr:='{}'::geometry[];
    	for i in EXECUTE $Q$ select (st_dump($1)).geom  $Q$ using geom LOOP
    	  	transform_i :=geoc_wgs84tobd09_point(i);
    		multiArr := array_append(multiArr, transform_i);
    	end LOOP;
    	return st_multi(ST_Union(multiArr));
    END;
    $BODY$
      LANGUAGE plpgsql VOLATILE
      COST 100;
    CREATE OR REPLACE FUNCTION "public"."geoc_wgs84tobd09_multipolygon"("source_geom" "public"."geometry")
      RETURNS "public"."geometry" AS $BODY$
    DECLARE
        target_parts    geometry[];
        single_polygon  geometry;
        single_polygon_trans  geometry;
        final_geom      geometry;
    
    BEGIN
        IF ST_GeometryType(source_geom) != 'ST_MultiPolygon' THEN
            RETURN null;
        END IF;
            FOR single_polygon IN SELECT (ST_Dump($1)).geom LOOP
                    single_polygon_trans := geoc_wgs84tobd09_polygon(single_polygon); 
                    target_parts := array_append(target_parts,single_polygon_trans);
            END LOOP;
    				
            SELECT st_multi(ST_Union(target_parts)) INTO final_geom;
            RETURN final_geom;
    END;
    $BODY$
      LANGUAGE plpgsql VOLATILE
      COST 100;
    CREATE OR REPLACE FUNCTION "public"."geoc_wgs84tobd09_point"("geom" "public"."geometry")
      RETURNS "public"."geometry" AS $BODY$
    DECLARE
    lon       numeric; 
    lat       numeric; 
    bd_point  geometry;
    gcj_point  geometry;
    
    BEGIN
        if st_geometrytype(geom) != 'ST_Point' then
          return null;
        end if;
        lon := st_x(geom);
        lat := st_y(geom);
        if geoc_is_in_china_bbox(lon, lat) = false THEN 
          return geom;
        end if;
        gcj_point = geoc_wgs84togcj02_point(geom);
    		bd_point = geoc_gcj02tobd09_point(gcj_point);
    	  return bd_point; 
    
    END;
    $BODY$
      LANGUAGE plpgsql VOLATILE
      COST 100;
    CREATE OR REPLACE FUNCTION "public"."geoc_wgs84tobd09_polygon"("source_geom" "public"."geometry")
      RETURNS "public"."geometry" AS $BODY$
    DECLARE
        target_parts    geometry[];
        source_npoints  integer;
        single_line     geometry;
        single_line_trans geometry;
        single_polygon  geometry;
        final_geom      geometry;
    
    BEGIN
        IF ST_GeometryType(source_geom) != 'ST_Polygon' THEN
            RETURN null;
        END IF;
    
        FOR single_polygon IN SELECT ST_ExteriorRing ((st_dumprings($1)).geom) as geom LOOP				
            source_npoints := ST_NPoints(single_polygon); 
            single_line  := ST_RemovePoint(single_polygon, source_npoints - 1);  
            single_line_trans := geoc_wgs84tobd09_line(single_line);  
            target_parts := array_append(target_parts, ST_AddPoint(single_line_trans, ST_PointN(single_line_trans, 1)));  
        END LOOP;
        SELECT ST_MakePolygon(target_parts[1], target_parts[2:array_upper(target_parts, 1)]) INTO final_geom;  
        RETURN final_geom;
    
    END;
    $BODY$
      LANGUAGE plpgsql VOLATILE
      COST 100;
    CREATE OR REPLACE FUNCTION "public"."geoc_wgs84togcj02"("geom" "public"."geometry")
      RETURNS "public"."geometry" AS $BODY$
    DECLARE
    		i                 geometry;
    		transform_i       geometry;
    		multiArr          geometry[]; 
    	
    BEGIN
    IF st_srid(geom) != '4490' and  st_srid(geom) != '4326'THEN
            RETURN null;
    end if;
     	CASE ST_GeometryType(geom)
        	when 'ST_LineString' then 
    			return geoc_wgs84togcj02_line(geom);
    		when 'ST_MultiLineString' then 
    			return geoc_wgs84togcj02_multiline(geom);
    		when 'ST_Point' then 
    			return geoc_wgs84togcj02_point(geom);
    		when 'ST_MultiPoint' then 
    			return geoc_wgs84togcj02_multipoint(geom);
    		when 'ST_Polygon' then 
    			return geoc_wgs84togcj02_polygon(geom);
    		when 'ST_MultiPolygon' then
    			return geoc_wgs84togcj02_multipolygon(geom);
    		ELSE
         		RETURN null;
    	END CASE;
    END;
    $BODY$
      LANGUAGE plpgsql VOLATILE
      COST 100;
    CREATE OR REPLACE FUNCTION "public"."geoc_wgs84togcj02_line"("geom" "public"."geometry")
      RETURNS "public"."geometry" AS $BODY$
    DECLARE
    		p_p     geometry;
    		p_t     geometry;
    		z_t     geometry;
    		i       int;
    BEGIN
        i:=1;
    	while i <= st_npoints(geom) LOOP
    		p_p := st_pointn(geom,i);
        	p_t := geoc_wgs84togcj02_point(p_p);
    		geom:=st_setpoint(geom,i-1,p_t);
    		i:=i+1;
    	end LOOP;
    	return geom;
    
    END;
    $BODY$
      LANGUAGE plpgsql VOLATILE
      COST 100;
    CREATE OR REPLACE FUNCTION "public"."geoc_wgs84togcj02_multiline"("geom" "public"."geometry")
      RETURNS "public"."geometry" AS $BODY$
    DECLARE
    		i                 geometry;
    		transform_i       geometry;
    		multiArr          geometry[]; 
    	
    BEGIN
        multiArr:='{}'::geometry[];
    	for i in EXECUTE $Q$ select (st_dump($1)).geom $Q$ using geom LOOP
    	  	transform_i :=geoc_wgs84togcj02_line(i);
    		multiArr := array_append(multiArr, transform_i);
    	end LOOP;
    	return st_multi(ST_Union(multiArr));
    END;
    $BODY$
      LANGUAGE plpgsql VOLATILE
      COST 100;
    CREATE OR REPLACE FUNCTION "public"."geoc_wgs84togcj02_multipoint"("geom" "public"."geometry")
      RETURNS "public"."geometry" AS $BODY$
    DECLARE
    		i                 geometry;
    		transform_i       geometry;
    		multiArr          geometry[]; 
    	
    BEGIN
        multiArr:='{}'::geometry[];
    	for i in EXECUTE $Q$ select (st_dump($1)).geom $Q$ using geom LOOP
    	  	transform_i :=geoc_wgs84togcj02_point(i);
    		multiArr := array_append(multiArr, transform_i);
    	end LOOP;
    	return st_multi(ST_Union(multiArr));
    END;
    $BODY$
      LANGUAGE plpgsql VOLATILE
      COST 100;
    CREATE OR REPLACE FUNCTION "public"."geoc_wgs84togcj02_multipolygon"("source_geom" "public"."geometry")
      RETURNS "public"."geometry" AS $BODY$
    DECLARE
        target_parts    geometry[];
        single_polygon  geometry;
        single_polygon_trans  geometry;
        final_geom      geometry;
    
    BEGIN
        IF ST_GeometryType(source_geom) != 'ST_MultiPolygon' THEN
            RETURN null;
        END IF;
        FOR single_polygon IN SELECT (ST_Dump($1)).geom LOOP
            single_polygon_trans := geoc_wgs84togcj02_polygon(single_polygon); 
            target_parts := array_append(target_parts,single_polygon_trans);
        END LOOP;
        
        SELECT st_multi(ST_Union(target_parts)) INTO final_geom;
        RETURN final_geom;
    END;
    $BODY$
      LANGUAGE plpgsql VOLATILE
      COST 100;
    CREATE OR REPLACE FUNCTION "public"."geoc_wgs84togcj02"("coord" _numeric)
      RETURNS "pg_catalog"."_numeric" AS $BODY$
    DECLARE
        ret             numeric[];
        dLon            numeric;
        dlat            numeric;
    		lon             numeric;
    		lat             numeric;
    		d								jsonb;
    -- 		coord           ARRAY;
    BEGIN
        lon := coord[1];
        lat := coord[2];
        if (geoc_is_in_china_bbox(lon, lat) = false) then
            return coord;
        end if;
        d := geoc_delta(lon, lat);
        dlon := d->0;
        dlat := d->1;
        ret := ARRAY[lon + dlon , lat + dlat];
        return ret;
    END;
    $BODY$
      LANGUAGE plpgsql VOLATILE
      COST 100;
    CREATE OR REPLACE FUNCTION "public"."geoc_wgs84togcj02_point"("geom" "public"."geometry")
      RETURNS "public"."geometry" AS $BODY$
    DECLARE
        lon     numeric;
        lat     numeric;
        d       jsonb;
        dlon    numeric;
        dlat    numeric;
    BEGIN
        if st_geometrytype(geom) != 'ST_Point' then
            return null;
        end if;
        lon := st_x(geom);
        lat := st_y(geom);
        if (geoc_is_in_china_bbox(lon, lat) = false) then
            return geom;
        end if;
        d := geoc_delta(lon, lat);
        dlon := d->0;
        dlat := d->1;
        return st_makepoint(lon + dlon,lat + dlat);
    END;
    $BODY$
      LANGUAGE plpgsql VOLATILE
      COST 100;
    CREATE OR REPLACE FUNCTION "public"."geoc_wgs84togcj02_polygon"("source_geom" "public"."geometry")
      RETURNS "public"."geometry" AS $BODY$
    DECLARE
        target_parts    geometry[];
        source_npoints  integer;
        single_line     geometry;
        single_line_trans geometry;
        single_polygon  geometry;
        final_geom      geometry;
    
    BEGIN
        IF ST_GeometryType(source_geom) != 'ST_Polygon' THEN
            RETURN null;
        END IF;
    
        FOR single_polygon IN SELECT ST_ExteriorRing ((st_dumprings($1)).geom) as geom LOOP				
            source_npoints := ST_NPoints(single_polygon); 
            single_line  := ST_RemovePoint(single_polygon, source_npoints - 1);  
            single_line_trans := geoc_wgs84togcj02_line(single_line);  
            target_parts := array_append(target_parts, ST_AddPoint(single_line_trans, ST_PointN(single_line_trans, 1)));  
        END LOOP;
        SELECT ST_MakePolygon(target_parts[1], target_parts[2:array_upper(target_parts, 1)]) INTO final_geom; 
        RETURN final_geom;
    
    END;
    $BODY$
      LANGUAGE plpgsql VOLATILE
      COST 100;
    CREATE OR REPLACE FUNCTION "public"."geoc_bd09tocgcs2000"("geom" "public"."geometry")
      RETURNS "public"."geometry" AS $BODY$
    DECLARE
    BEGIN
    IF st_srid(geom) != '4490' THEN
            RETURN null;
    end if;
    return st_transform(st_setsrid(geoc_bd09towgs84(geom),4326),4490);
    END;
    $BODY$
      LANGUAGE plpgsql VOLATILE
      COST 100;
    CREATE OR REPLACE FUNCTION "public"."geoc_bd09togcj02"("geom" "public"."geometry")
      RETURNS "public"."geometry" AS $BODY$
    DECLARE
    		i                 geometry;
    		transform_i       geometry;
    		multiArr          geometry[]; 
    	
    BEGIN
    IF st_srid(geom) != '4490' and  st_srid(geom) != '4326'THEN
            RETURN null;
    	end if;
     	CASE ST_GeometryType(geom)
        	when 'ST_LineString' then 
    			return geoc_bd09togcj02_line(geom);
    		when 'ST_MultiLineString' then 
    			return geoc_bd09togcj02_multiline(geom);
    		when 'ST_Point' then 
    			return geoc_bd09togcj02_point(geom);
    		when 'ST_MultiPoint' then 
    			return geoc_bd09togcj02_multipoint(geom);
    		when 'ST_Polygon' then 
    			return geoc_bd09togcj02_polygon(geom);
    		when 'ST_MultiPolygon' then
    			return geoc_bd09togcj02_multipolygon(geom);
    		ELSE
         		RETURN null;
    	END CASE;
    END;
    $BODY$
      LANGUAGE plpgsql VOLATILE
      COST 100;
    CREATE OR REPLACE FUNCTION "public"."geoc_bd09togcj02_line"("geom" "public"."geometry")
      RETURNS "public"."geometry" AS $BODY$
    DECLARE
    		p_p     geometry;
    		p_t     geometry;
    		z_t     geometry;
    		i       int;
    BEGIN
        i:=1;
    	while i <= st_npoints(geom) LOOP
    		p_p := st_pointn(geom,i);
        	p_t := geoc_bd09togcj02_point(p_p);
    		geom:=st_setpoint(geom,i-1,p_t);
    		i:=i+1;
    	end LOOP;
    	return geom;
    
    END;
    $BODY$
      LANGUAGE plpgsql VOLATILE
      COST 100;
    CREATE OR REPLACE FUNCTION "public"."geoc_bd09togcj02_multiline"("geom" "public"."geometry")
      RETURNS "public"."geometry" AS $BODY$
    DECLARE
    		i                 geometry;
    		transform_i       geometry;
    		multiArr          geometry[]; 
    	
    BEGIN
        multiArr:='{}'::geometry[];
    	for i in EXECUTE $Q$ select (st_dump($1)).geom $Q$ using geom LOOP
    	  	transform_i :=geoc_bd09togcj02_line(i);
    		multiArr := array_append(multiArr, transform_i);
    	end LOOP;
    	return st_multi(ST_Union(multiArr));
    END;
    $BODY$
      LANGUAGE plpgsql VOLATILE
      COST 100;
    CREATE OR REPLACE FUNCTION "public"."geoc_bd09togcj02_multipoint"("geom" "public"."geometry")
      RETURNS "public"."geometry" AS $BODY$
    DECLARE
    		i                 geometry;
    		transform_i       geometry;
    		multiArr          geometry[]; 
    	
    BEGIN
        multiArr:='{}'::geometry[];
    	for i in EXECUTE $Q$ select (st_dump($1)).geom $Q$ using geom LOOP
    	  	transform_i :=geoc_bd09togcj02_point(i);
    		multiArr := array_append(multiArr, transform_i);
    	end LOOP;
    	return st_multi(ST_Union(multiArr));
    END;
    $BODY$
      LANGUAGE plpgsql VOLATILE
      COST 100;
    CREATE OR REPLACE FUNCTION "public"."geoc_bd09togcj02_multipolygon"("source_geom" "public"."geometry")
      RETURNS "public"."geometry" AS $BODY$
    DECLARE
        target_parts    geometry[];
        single_polygon  geometry;
        single_polygon_trans  geometry;
        final_geom      geometry;
    
    BEGIN
        IF ST_GeometryType(source_geom) != 'ST_MultiPolygon' THEN
            RETURN null;
        END IF;
        FOR single_polygon IN SELECT (ST_Dump($1)).geom LOOP
            single_polygon_trans := geoc_bd09togcj02_polygon(single_polygon); 
            target_parts := array_append(target_parts,single_polygon_trans);
        END LOOP;
        
        SELECT st_multi(ST_Union(target_parts)) INTO final_geom;
        
        RETURN final_geom;
    END;
    $BODY$
      LANGUAGE plpgsql VOLATILE
      COST 100;
    CREATE OR REPLACE FUNCTION "public"."geoc_bd09togcj02_point"("geom" "public"."geometry")
      RETURNS "public"."geometry" AS $BODY$
    DECLARE
      x       numeric; 
    	y       numeric; 
     	z       double precision; 
     	theta   double precision; 
     	x_pi    double precision:=3.14159265358979324 * 3000.0 / 180.0; 
    	gcj_point  geometry;
    
    BEGIN
        if st_geometrytype(geom) != 'ST_Point' then
            return null;
        end if;
        x := st_x(geom);
        y := st_y(geom);
        if (geoc_is_in_china_bbox(x, y) = false) then
            return geom;
        end if;
        x:= ST_X(geom) - 0.0065; 
        y:= ST_Y(geom) - 0.006; 
        z:=sqrt(power(x,2) + power(y,2)) - 0.00002 *sin(y * x_pi); 
        theta:= atan2(y, x) - 0.000003 * cos(x * x_pi); 
    	  gcj_point:=ST_SetSRID(ST_MakePoint(z *cos(theta),z *sin(theta)),4326); 
    	 return gcj_point;
    
    END;
    $BODY$
      LANGUAGE plpgsql VOLATILE
      COST 100;
    CREATE OR REPLACE FUNCTION "public"."geoc_bd09togcj02_polygon"("source_geom" "public"."geometry")
      RETURNS "public"."geometry" AS $BODY$
    DECLARE
        target_parts    geometry[];
        source_npoints  integer;
        single_line     geometry;
        single_line_trans geometry;
        single_polygon  geometry;
        final_geom      geometry;
    
    BEGIN
        IF ST_GeometryType(source_geom) != 'ST_Polygon' THEN
            RETURN null;
        END IF;
    
        FOR single_polygon IN SELECT ST_ExteriorRing ((st_dumprings($1)).geom) as geom LOOP				
            source_npoints := ST_NPoints(single_polygon); 
            single_line  := ST_RemovePoint(single_polygon, source_npoints - 1);  
            single_line_trans := geoc_bd09togcj02_line(single_line);  
            target_parts := array_append(target_parts, ST_AddPoint(single_line_trans, ST_PointN(single_line_trans, 1)));  
        END LOOP;
        SELECT ST_MakePolygon(target_parts[1], target_parts[2:array_upper(target_parts, 1)]) INTO final_geom;  
    
        RETURN final_geom;
    
    END;
    $BODY$
      LANGUAGE plpgsql VOLATILE
      COST 100;
    CREATE OR REPLACE FUNCTION "public"."geoc_bd09towgs84"("geom" "public"."geometry")
      RETURNS "public"."geometry" AS $BODY$
    DECLARE
    		i                 geometry;
    		transform_i       geometry;
    		multiArr          geometry[]; 
    	
    BEGIN
    	IF st_srid(geom) != '4490' and  st_srid(geom) != '4326'THEN
            RETURN null;
    	end if;
     	CASE ST_GeometryType(geom)
        	when 'ST_LineString' then 
    			return geoc_bd09towgs84_line(geom);
    		when 'ST_MultiLineString' then 
    			return geoc_bd09towgs84_multiline(geom);
    		when 'ST_Point' then 
    			return geoc_bd09towgs84_point(geom);
    		when 'ST_MultiPoint' then 
    			return geoc_bd09towgs84_multipoint(geom);
    		when 'ST_Polygon' then 
    			return geoc_bd09towgs84_polygon(geom);
    		when 'ST_MultiPolygon' then
    			return geoc_bd09towgs84_multipolygon(geom);
    		ELSE
         		RETURN null;
    	END CASE;
    END;
    $BODY$
      LANGUAGE plpgsql VOLATILE
      COST 100;
    CREATE OR REPLACE FUNCTION "public"."geoc_bd09towgs84_line"("geom" "public"."geometry")
      RETURNS "public"."geometry" AS $BODY$
    DECLARE
    		p_p     geometry;
    		p_t     geometry;
    		z_t     geometry;
    		i       int;
    BEGIN
        i:=1;
    	while i <= st_npoints(geom) LOOP
    		p_p := st_pointn(geom,i);
        	p_t := geoc_bd09towgs84_point(p_p);
    		geom:=st_setpoint(geom,i-1,p_t);
    		i:=i+1;
    	end LOOP;
    	return geom;
    
    END;
    $BODY$
      LANGUAGE plpgsql VOLATILE
      COST 100;
    CREATE OR REPLACE FUNCTION "public"."geoc_bd09towgs84_multiline"("geom" "public"."geometry")
      RETURNS "public"."geometry" AS $BODY$
    DECLARE
    		i                 geometry;
    		transform_i       geometry;
    		multiArr          geometry[]; 
    	
    BEGIN
        multiArr:='{}'::geometry[];
    	for i in EXECUTE $Q$ select (st_dump($1)).geom $Q$ using geom LOOP
    	  	transform_i :=geoc_bd09towgs84_line(i);
    		multiArr := array_append(multiArr, transform_i);
    	end LOOP;
    	return st_multi(ST_Union(multiArr));
    END;
    $BODY$
      LANGUAGE plpgsql VOLATILE
      COST 100;
    CREATE OR REPLACE FUNCTION "public"."geoc_bd09towgs84_multipoint"("geom" "public"."geometry")
      RETURNS "public"."geometry" AS $BODY$
    DECLARE
    		i                 geometry;
    		transform_i       geometry;
    		multiArr          geometry[]; 
    	
    BEGIN
        multiArr:='{}'::geometry[];
    	for i in EXECUTE $Q$ select (st_dump($1)).geom $Q$ using geom LOOP
    	  	transform_i :=geoc_bd09towgs84_point(i);
    		multiArr := array_append(multiArr, transform_i);
    	end LOOP;
    	return st_multi(ST_Union(multiArr));
    END;
    $BODY$
      LANGUAGE plpgsql VOLATILE
      COST 100;

查询经纬度属于哪个区域

SELECT "字段名" FROM "表名" WHERE ST_Contains( geom ,st_geometryfromtext('POINT(120.1 30.1)',4326) )='t'

查询在指定区域的所有数据（表中包含经纬度）

SELECT *
    FROM 表名
    where
    ST_Contains((SELECT geom FROM province WHERE province = '内蒙古自治区'), st_geometryfromtext('POINT('|| longitude ||' '|| latitude ||')',4326))='t'

# postGIS相关函数 #

## **1. OGC标准函数** ##

### 管理函数： ###

1.  `添加几何字段 AddGeometryColumn(, , , , , )`
2.  `删除几何字段 DropGeometryColumn(, , )`
3.  `检查数据库几何字段并在geometry_columns中归档 Probe_Geometry_Columns()`
4.  `给几何对象设置空间参考（在通过一个范围做空间查询时常用） ST_SetSRID(geometry, integer)`

### 几何对象关系函数： ###

1.  `获取两个几何对象间的距离 ST_Distance(geometry, geometry)`
2.  `如果两个几何对象间距离在给定值范围内，则返回TRUE ST_DWithin(geometry, geometry, float)`
3.  `判断两个几何对象是否相等`
4.  `（比如LINESTRING(0 0, 2 2)和LINESTRING(0 0, 1 1, 2 2)是相同的几何对象） ST_Equals(geometry, geometry)`
5.  `判断两个几何对象是否分离 ST_Disjoint(geometry, geometry)`
6.  `判断两个几何对象是否相交 ST_Intersects(geometry, geometry)`
7.  `判断两个几何对象的边缘是否接触 ST_Touches(geometry, geometry)`
8.  `判断两个几何对象是否互相穿过 ST_Crosses(geometry, geometry)`
9.  `判断A是否被B包含 ST_Within(geometry A, geometry B)`
10. `判断两个几何对象是否是重叠 ST_Overlaps(geometry, geometry)`
11. `判断A是否包含B ST_Contains(geometry A, geometry B)`
12. `判断A是否覆盖 B ST_Covers(geometry A, geometry B)`
13. `判断A是否被B所覆盖 ST_CoveredBy(geometry A, geometry B)`
14. `通过DE-9IM 矩阵判断两个几何对象的关系是否成立 ST_Relate(geometry, geometry, intersectionPatternMatrix)`
15. `获得两个几何对象的关系（DE-9IM矩阵） ST_Relate(geometry, geometry)`

### 几何对象处理函数： ###

1.  `获取几何对象的中心 ST_Centroid(geometry)`
2.  `面积量测 ST_Area(geometry)`
3.  `长度量测 ST_Length(geometry)`
4.  `返回曲面上的一个点 ST_PointOnSurface(geometry)`
5.  `获取边界 ST_Boundary(geometry)`
6.  `获取缓冲后的几何对象 ST_Buffer(geometry, double, [integer])`
7.  `获取多几何对象的外接对象 ST_ConvexHull(geometry)`
8.  `获取两个几何对象相交的部分 ST_Intersection(geometry, geometry)`
9.  `将经度小于0的值加360使所有经度值在0-360间 ST_Shift_Longitude(geometry)`
10. `获取两个几何对象不相交的部分（A、B可互换） ST_SymDifference(geometry A, geometry B)`
11. `从A去除和B相交的部分后返回 ST_Difference(geometry A, geometry B)`
12. `返回两个几何对象的合并结果 ST_Union(geometry, geometry)`
13. `返回一系列几何对象的合并结果 ST_Union(geometry set)`
14. `用较少的内存和较长的时间完成合并操作，结果和ST_Union相同 ST_MemUnion(geometry set)`

### 几何对象存取函数： ###

1.  `获取几何对象的WKT描述 ST_AsText(geometry)`
2.  `获取几何对象的WKB描述 ST_AsBinary(geometry)`
3.  `获取几何对象的空间参考ID ST_SRID(geometry)`
4.  `获取几何对象的维数 ST_Dimension(geometry)`
5.  `获取几何对象的边界范围 ST_Envelope(geometry)`
6.  `判断几何对象是否为空 ST_IsEmpty(geometry)`
7.  `判断几何对象是否不包含特殊点（比如自相交） ST_IsSimple(geometry)`
8.  `判断几何对象是否闭合 ST_IsClosed(geometry)`
9.  `判断曲线是否闭合并且不包含特殊点 ST_IsRing(geometry)`
10. `获取多几何对象中的对象个数 ST_NumGeometries(geometry)`
11. `获取多几何对象中第N个对象 ST_GeometryN(geometry,int)`
12. `获取几何对象中的点个数 ST_NumPoints(geometry)`
13. `获取几何对象的第N个点 ST_PointN(geometry,integer)`
14. `获取多边形的外边缘 ST_ExteriorRing(geometry)`
15. `获取多边形内边界个数 ST_NumInteriorRings(geometry)`
16. `同上 ST_NumInteriorRing(geometry)`
17. `获取多边形的第N个内边界 ST_InteriorRingN(geometry,integer)`
18. `获取线的终点 ST_EndPoint(geometry)`
19. `获取线的起始点 ST_StartPoint(geometry)`
20. `获取几何对象的类型 GeometryType(geometry)`
21. `类似上，但是不检查M值，即POINTM对象会被判断为point ST_GeometryType(geometry)`
22. `获取点的X坐标 ST_X(geometry)`
23. `获取点的Y坐标 ST_Y(geometry)`
24. `获取点的Z坐标 ST_Z(geometry)`
25. `获取点的M值 ST_M(geometry)`

### 几何对象构造函数： ###

参考语义： Text：WKT WKB：WKB Geom:Geometry M:Multi Bd:BuildArea Coll:Collection ST\_GeomFromText(text,\[\])

1.  `ST_PointFromText(text,[])`
2.  `ST_LineFromText(text,[])`
3.  `ST_LinestringFromText(text,[])`
4.  `ST_PolyFromText(text,[])`
5.  `ST_PolygonFromText(text,[])`
6.  `ST_MPointFromText(text,[])`
7.  `ST_MLineFromText(text,[])`
8.  `ST_MPolyFromText(text,[])`
9.  `ST_GeomCollFromText(text,[])`
10. `ST_GeomFromWKB(bytea,[])`
11. `ST_GeometryFromWKB(bytea,[])`
12. `ST_PointFromWKB(bytea,[])`
13. `ST_LineFromWKB(bytea,[])`
14. `ST_LinestringFromWKB(bytea,[])`
15. `ST_PolyFromWKB(bytea,[])`
16. `ST_PolygonFromWKB(bytea,[])`
17. `ST_MPointFromWKB(bytea,[])`
18. `ST_MLineFromWKB(bytea,[])`
19. `ST_MPolyFromWKB(bytea,[])`
20. `ST_GeomCollFromWKB(bytea,[])`
21. `ST_BdPolyFromText(text WKT, integer SRID)`
22. `ST_BdMPolyFromText(text WKT, integer SRID)`

1.  ## PostGIS扩展函数 ##
    
    ### 管理函数： ###
    
    删除一个空间表（包括geometry\_columns中的记录） DropGeometryTable(\[\], ) 更新空间表的空间参考 UpdateGeometrySRID(\[\], , , ) 更新空间表的统计信息 update\_geometry\_stats(\[, \])

参考语义： Geos：GEOS库 Jts：JTS库 Proj：PROJ4库 postgis\_version()

1.  `postgis_lib_version()`
2.  `postgis_lib_build_date()`
3.  `postgis_script_build_date()`
4.  `postgis_scripts_installed()`
5.  `postgis_scripts_released()`
6.  `postgis_geos_version()`
7.  `postgis_jts_version()`
8.  `postgis_proj_version()`
9.  `postgis_uses_stats()`
10. `postgis_full_version()`

### 几何操作符： ###

1.  `A范围=B范围 A = B`
2.  `A范围覆盖B范围或A范围在B范围左侧 A &<> B`
3.  `A范围在B范围左侧 A <<>> B`
4.  `A范围覆盖B范围或A范围在B范围下方 A &<| B A范围覆盖B范围或A范围在B范围上方 A |&> B`
5.  `A范围在B范围下方 A <<| B A范围在B范围上方 A |>> B`
6.  `A=B A ~= B`
7.  `A范围被B范围包含 A @ B`
8.  `A范围包含B范围 A ~ B`
9.  `A范围覆盖B范围 A && B`

### 几何量测函数： ###

1.  `量测面积 ST_Area(geometry)`
2.  `根据经纬度点计算在地球曲面上的距离，单位米，地球半径取值6370986米 ST_distance_sphere(point, point)`
3.  `类似上，使用指定的地球椭球参数 ST_distance_spheroid(point, point, spheroid)`
4.  `量测2D对象长度 ST_length2d(geometry)`
5.  `量测3D对象长度 ST_length3d(geometry)`
6.  `根据经纬度对象计算在地球曲面上的长度 ST_length_spheroid(geometry,spheroid)`
7.  `ST_length3d_spheroid(geometry,spheroid)`
8.  `量测两个对象间距离 ST_distance(geometry, geometry)`
9.  `量测两条线之间的最大距离 ST_max_distance(linestring,linestring)`
10. `量测2D对象的周长 ST_perimeter(geometry)`
11. `ST_perimeter2d(geometry)`
12. `量测3D对象的周长 ST_perimeter3d(geometry)`
13. `量测两点构成的方位角，单位弧度 ST_azimuth(geometry, geometry)`

### 几何对象输出： ###

参考语义： NDR：Little Endian XDR：big-endian HEXEWKB：Canonical SVG：SVG 格式 GML：GML 格式 KML：KML 格式 GeoJson：GeoJson 格式

1.  `ST_AsBinary(geometry,{'NDR'|'XDR'})`
2.  `ST_AsEWKT(geometry)`
3.  `ST_AsEWKB(geometry, {'NDR'|'XDR'})`
4.  `ST_AsHEXEWKB(geometry, {'NDR'|'XDR'})`
5.  `ST_AsSVG(geometry, [rel], [precision])`
6.  `ST_AsGML([version], geometry, [precision])`
7.  `ST_AsKML([version], geometry, [precision])`
8.  `ST_AsGeoJson([version], geometry, [precision], [options])`

### 几何对象创建： ###

参考语义： Dump：转储 ST\_GeomFromEWKT(text)

1.  `ST_GeomFromEWKB(bytea)`
2.  `ST_MakePoint(, , [], [])`
3.  `ST_MakePointM(, , )`
4.  `ST_MakeBox2D(, )`
5.  `ST_MakeBox3D(, )`
6.  `ST_MakeLine(geometry set)`
7.  `ST_MakeLine(geometry, geometry)`
8.  `ST_LineFromMultiPoint(multipoint)`
9.  `ST_MakePolygon(linestring, [linestring[]])`
10. `ST_BuildArea(geometry)`
11. `ST_Polygonize(geometry set)`
12. `ST_Collect(geometry set)`
13. `ST_Collect(geometry, geometry)`
14. `ST_Dump(geometry)`
15. `ST_DumpRings(geometry)`

### 几何对象编辑： ###

1.  `给几何对象添加一个边界，会使查询速度加快 ST_AddBBOX(geometry)`
2.  `删除几何对象的边界 ST_DropBBOX(geometry)`
3.  `添加、删除、设置点 ST_AddPoint(linestring, point, [])`
4.  `ST_RemovePoint(linestring, offset)`
5.  `ST_SetPoint(linestring, N, point)`
6.  `几何对象类型转换 ST_Force_collection(geometry)`
7.  `ST_Force_2d(geometry)`
8.  `ST_Force_3dz(geometry), ST_Force_3d(geometry),`
9.  `ST_Force_3dm(geometry)`
10. `ST_Force_4d(geometry)`
11. `ST_Multi(geometry)`
12. `将几何对象转化到指定空间参考 ST_Transform(geometry,integer)`
13. `对3D几何对象作仿射变化 ST_Affine(geometry, float8, float8, float8, float8, float8, float8, float8, float8, float8, float8, float8, float8)`
14. `对2D几何对象作仿射变化 ST_Affine(geometry, float8, float8, float8, float8, float8, float8)`
15. `对几何对象作偏移 ST_Translate(geometry, float8, float8, float8)`
16. `对几何对象作缩放 ST_Scale(geometry, float8, float8, float8)`
17. `对3D几何对象作旋转 ST_RotateZ(geometry, float8)`
18. `ST_RotateX(geometry, float8)`
19. `ST_RotateY(geometry, float8)`
20. `对2D对象作偏移和缩放 ST_TransScale(geometry, float8, float8, float8, float8)`
21. `反转 ST_Reverse(geometry)`
22. `转化到右手定则 ST_ForceRHR(geometry)`
23. `参考IsSimple函数`
24. `使用Douglas-Peuker算法 ST_Simplify(geometry, tolerance)`
25. `ST_SimplifyPreserveTopology(geometry, tolerance)`
26. `讲几何对象顶点捕捉到网格 ST_SnapToGrid(geometry, originX, originY, sizeX, sizeY)`
27. `ST_SnapToGrid(geometry, sizeX, sizeY), ST_SnapToGrid(geometry, size)`
28. `第二个参数为点，指定原点坐标 ST_SnapToGrid(geometry, geometry, sizeX, sizeY, sizeZ, sizeM)`
29. `分段 ST_Segmentize(geometry, maxlength)`
30. `合并为线 ST_LineMerge(geometry)`

### 线性参考： ###

1.  `根据location（0-1）获得该位置的点 ST_line_interpolate_point(linestring, location)`
2.  `获取一段线 ST_line_substring(linestring, start, end)`
3.  `根据点获取location（0-1） ST_line_locate_point(LineString, Point)`
4.  `根据量测值获得几何对象 ST_locate_along_measure(geometry, float8)`
5.  `根据量测值区间获得几何对象集合 ST_locate_between_measures(geometry, float8, float8)`

### 杂项功能函数： ###

1.  `几何对象的摘要 ST_Summary(geometry)`
2.  `几何对象的边界 ST_box2d(geometry)`
3.  `ST_box3d(geometry)`
4.  `多个几何对象的边界 ST_extent(geometry set)`
5.  `0=2d, 1=3dm, 2=3dz, 3=4d ST_zmflag(geometry)`
6.  `是否包含Bounding Box ST_HasBBOX(geometry)`
7.  `几何对象的维数：2、3、4 ST_ndims(geometry)`
8.  `子对象的个数 ST_nrings(geometry)`
9.  `ST_npoints(geometry)`
10. `对象是否验证成功 ST_isvalid(geometry)`
11. `扩大几何对象 ST_expand(geometry, float)`
12. `计算一个空间表的边界范围 ST_estimated_extent([schema], table, geocolumn)`
13. `获得空间参考 ST_find_srid(, , )`
14. `几何对象使用的内存大小，单位byte ST_mem_size(geometry)`
15. `点是否在圆上 ST_point_inside_circle(,,,)`
16. `获取边界的X、Y、Z ST_XMin(box3d)`
17. `ST_YMin(box3d)`
18. `ST_ZMin(box3d)`
19. `ST_XMax(box3d)`
20. `ST_YMax(box3d)`
21. `ST_ZMax(box3d)`
22. `构造一个几何对象的数组 ST_Accum(geometry set)`

### 长事务支持： ###

1.  `启用/关闭长事务支持，重复调用无副作用 EnableLongTransactions()`
2.  `DisableLongTransactions()`
3.  `检查对行的update和delete操作是否已授权 CheckAuth([],, )`
4.  `锁定行 LockRow([],, , , [])`
5.  `解锁行 UnlockRows()`
6.  `在当前事务中添加授权ID AddAuth()`

其它还有SQL-MM和ArcSDE样式的函数支持，可以参考http://postgis.refractions.net/documentation/manual-1.3/ch06.html\#id2750611，这里就不详细列了。