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observatory-extension/release/observatory--1.5.1.sql

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1.5.1 release artifact
2017-05-16 22:27:49 +08:00
--DO NOT MODIFY THIS FILE, IT IS GENERATED AUTOMATICALLY FROM SOURCES
-- Complain if script is sourced in psql, rather than via CREATE EXTENSION
\echo Use "CREATE EXTENSION observatory" to load this file. \quit
-- Version number of the extension release
CREATE OR REPLACE FUNCTION cdb_observatory_version()
RETURNS text AS $$
SELECT '1.5.1'::text;
$$ language 'sql' STABLE STRICT;
-- Internal identifier of the installed extension instence
-- e.g. 'dev' for current development version
CREATE OR REPLACE FUNCTION _cdb_observatory_internal_version()
RETURNS text AS $$
SELECT installed_version FROM pg_available_extensions where name='observatory' and pg_available_extensions IS NOT NULL;
$$ language 'sql' STABLE STRICT;
-- Returns the table name with geoms for the given geometry_id
-- TODO probably needs to take in the column_id array to get the relevant
-- table where there is multiple sources for a column from multiple
-- geometries.
CREATE OR REPLACE FUNCTION cdb_observatory._OBS_GeomTable(
geom geometry(Geometry, 4326),
geometry_id text,
time_span text DEFAULT NULL
)
RETURNS TEXT
AS $$
DECLARE
result text;
BEGIN
EXECUTE '
SELECT tablename FROM observatory.OBS_table
WHERE id IN (
SELECT table_id
FROM observatory.OBS_table tab,
observatory.OBS_column_table coltable,
observatory.OBS_column col
WHERE type ILIKE ''geometry''
AND coltable.column_id = col.id
AND coltable.table_id = tab.id
AND col.id = $1
AND CASE WHEN $3::TEXT IS NOT NULL THEN timespan ILIKE $3::TEXT ELSE TRUE END
ORDER BY timespan DESC LIMIT 1
)
'
USING geometry_id, geom, time_span
INTO result;
return result;
END;
$$ LANGUAGE plpgsql;
-- A function that gets the column data for multiple columns
-- Old: OBS_GetColumnData
CREATE OR REPLACE FUNCTION cdb_observatory._OBS_GetColumnData(
geometry_id text,
column_ids text[],
timespan text
)
RETURNS SETOF JSON
AS $$
BEGIN
-- figure out highest-weight geometry_id/timespan pair for the first data column
-- TODO this should be done for each data column separately
IF geometry_id IS NULL OR timespan IS NULL THEN
EXECUTE '
SELECT data_t.timespan timespan, geom_c.id boundary_id
FROM observatory.obs_table data_t,
observatory.obs_column_table data_ct,
observatory.obs_column data_c,
observatory.obs_column_table geoid_ct,
observatory.obs_column_to_column c2c,
observatory.obs_column geom_c
WHERE data_c.id = $2
AND data_ct.column_id = data_c.id
AND data_ct.table_id = data_t.id
AND geoid_ct.table_id = data_t.id
AND geoid_ct.column_id = c2c.source_id
AND c2c.reltype = ''geom_ref''
AND geom_c.id = c2c.target_id
AND CASE WHEN $3 IS NULL THEN True ELSE $3 = timespan END
AND CASE WHEN $1 IS NULL THEN True ELSE $1 = geom_c.id END
ORDER BY geom_c.weight DESC,
data_t.timespan DESC
LIMIT 1
' INTO timespan, geometry_id
USING geometry_id, (column_ids)[1], timespan;
END IF;
RETURN QUERY
EXECUTE '
WITH geomref AS (
SELECT ct.table_id id
FROM observatory.OBS_column_to_column c2c,
observatory.OBS_column_table ct
WHERE c2c.reltype = ''geom_ref''
AND c2c.target_id = $1
AND c2c.source_id = ct.column_id
),
column_ids as (
select row_number() over () as no, a.column_id as column_id from (select unnest($2) as column_id) a
)
SELECT row_to_json(a) from (
select colname,
tablename,
aggregate,
name,
type,
c.description,
$1 AS boundary_id
FROM column_ids, observatory.OBS_column c, observatory.OBS_column_table ct, observatory.OBS_table t
WHERE column_ids.column_id = c.id
AND c.id = ct.column_id
AND t.id = ct.table_id
AND t.timespan = $3
AND t.id in (SELECT id FROM geomref)
order by column_ids.no
) a
'
USING geometry_id, column_ids, timespan
RETURN;
END;
$$ LANGUAGE plpgsql;
--Test point cause Stuart always seems to make random points in the water
CREATE OR REPLACE FUNCTION cdb_observatory._TestPoint()
RETURNS geometry(Point, 4326)
AS $$
BEGIN
-- new york city
RETURN ST_SetSRID(ST_Point( -73.936669, 40.704512), 4326);
END;
$$ LANGUAGE plpgsql;
--Test polygon cause Stuart always seems to make random points in the water
-- TODO: remove as it's not used anywhere?
CREATE OR REPLACE FUNCTION cdb_observatory._TestArea()
RETURNS geometry(Geometry, 4326)
AS $$
BEGIN
-- Buffer NYC point by 500 meters
RETURN ST_Buffer(cdb_observatory._TestPoint()::geography, 500)::geometry;
END;
$$ LANGUAGE plpgsql;
--Problematic test area that tends to cause errors
CREATE OR REPLACE FUNCTION cdb_observatory._ProblemTestArea()
RETURNS geometry(Geometry, 4326)
AS $$
BEGIN
RETURN ST_Translate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
END;
$$ LANGUAGE plpgsql;
--Used to expand a column based response to a table based one. Give it the desired
--columns and it will return a partial query for rolling them out to a table.
CREATE OR REPLACE FUNCTION cdb_observatory._OBS_BuildSnapshotQuery(names text[])
RETURNS TEXT
AS $$
DECLARE
q text;
i numeric;
BEGIN
q := 'SELECT ';
FOR i IN 1..array_upper(names,1)
LOOP
q = q || format(' vals[%s] As %I', i, names[i]);
IF i < array_upper(names, 1) THEN
q= q || ',';
END IF;
END LOOP;
RETURN q;
END;
$$ LANGUAGE plpgsql;
-- Function that replaces all non digits or letters with _ trims and lowercases the
-- passed measure name
CREATE OR REPLACE FUNCTION cdb_observatory._OBS_StandardizeMeasureName(measure_name text)
RETURNS text
AS $$
DECLARE
result text;
BEGIN
-- Turn non letter or digits to _
result = regexp_replace(measure_name, '[^\dA-Za-z]+','_', 'g');
-- Remove duplicate _'s
result = regexp_replace(result,'_{2,}','_', 'g');
-- Trim _'s from beginning and end
result = trim(both '_' from result);
result = lower(result);
RETURN result;
END;
$$ LANGUAGE plpgsql;
-- Function that returns the currently deployed obs_dump_version from the
-- remote table of the same name.
CREATE OR REPLACE FUNCTION cdb_observatory.OBS_DumpVersion(
)
RETURNS TEXT
AS $$
DECLARE
result text;
BEGIN
EXECUTE '
SELECT MAX(dump_id) FROM observatory.obs_dump_version
' INTO result;
RETURN result;
END;
$$ LANGUAGE plpgsql;
-- Function we can call to raise an exception in the midst of a SQL statement
CREATE OR REPLACE FUNCTION cdb_observatory._OBS_RaiseNotice(
message TEXT
) RETURNS TEXT
AS $$
BEGIN
RAISE NOTICE '%', message;
RETURN NULL;
END;
$$ LANGUAGE plpgsql;
-- Create a function that always returns the first non-NULL item
CREATE OR REPLACE FUNCTION cdb_observatory.first_agg ( anyelement, anyelement )
RETURNS anyelement LANGUAGE SQL IMMUTABLE STRICT AS $$
SELECT $1;
$$;
DROP AGGREGATE IF EXISTS cdb_observatory.FIRST (anyelement);
-- And then wrap an aggregate around it
CREATE AGGREGATE cdb_observatory.FIRST (
sfunc = cdb_observatory.first_agg,
basetype = anyelement,
stype = anyelement
);
CREATE OR REPLACE FUNCTION cdb_observatory.isnumeric (
typename varchar
)
RETURNS BOOLEAN LANGUAGE SQL IMMUTABLE STRICT AS $$
SELECT LOWER(typename) IN (
'smallint',
'integer',
'bigint',
'decimal',
'numeric',
'real',
'double precision'
)
$$;
-- Attempt to perform intersection, if there's an exception then buffer
-- https://gis.stackexchange.com/questions/50399/how-best-to-fix-a-non-noded-intersection-problem-in-postgis
CREATE OR REPLACE FUNCTION cdb_observatory.safe_intersection(
geom_a Geometry(Geometry, 4326),
geom_b Geometry(Geometry, 4326)
)
RETURNS Geometry(Geometry, 4326) AS
$$
BEGIN
RETURN ST_MakeValid(ST_Intersection(geom_a, geom_b));
EXCEPTION
WHEN OTHERS THEN
BEGIN
RETURN ST_MakeValid(ST_Intersection(ST_Buffer(geom_a, 0.0000001), ST_Buffer(geom_b, 0.0000001)));
EXCEPTION
WHEN OTHERS THEN
RETURN NULL;
END;
END
$$
LANGUAGE 'plpgsql' STABLE STRICT;
--Functions for augmenting specific tables
--------------------------------------------------------------------------------
-- Creates a table of demographic snapshot
CREATE OR REPLACE FUNCTION cdb_observatory.OBS_GetDemographicSnapshot(geom geometry(Geometry, 4326),
timespan text DEFAULT NULL,
boundary_id text DEFAULT NULL
) RETURNS SETOF JSON
AS $$
DECLARE
meta JSON;
BEGIN
boundary_id = COALESCE(boundary_id, 'us.census.tiger.census_tract');
EXECUTE $query$ SELECT cdb_observatory.OBS_GetMeta($1,
('[ ' ||
'{"numer_id": "us.census.acs.B01003001", "numer_timespan": ' || $2 || ', "geom_id": ' || $3 || '},' ||
'{"numer_id": "us.census.acs.B01001002", "numer_timespan": ' || $2 || ', "geom_id": ' || $3 || '},' ||
'{"numer_id": "us.census.acs.B01001026", "numer_timespan": ' || $2 || ', "geom_id": ' || $3 || '},' ||
'{"numer_id": "us.census.acs.B01002001", "numer_timespan": ' || $2 || ', "geom_id": ' || $3 || '},' ||
'{"numer_id": "us.census.acs.B03002003", "numer_timespan": ' || $2 || ', "geom_id": ' || $3 || '},' ||
'{"numer_id": "us.census.acs.B03002004", "numer_timespan": ' || $2 || ', "geom_id": ' || $3 || '},' ||
'{"numer_id": "us.census.acs.B03002006", "numer_timespan": ' || $2 || ', "geom_id": ' || $3 || '},' ||
'{"numer_id": "us.census.acs.B03002012", "numer_timespan": ' || $2 || ', "geom_id": ' || $3 || '},' ||
'{"numer_id": "us.census.acs.B03002005", "numer_timespan": ' || $2 || ', "geom_id": ' || $3 || '},' ||
'{"numer_id": "us.census.acs.B03002008", "numer_timespan": ' || $2 || ', "geom_id": ' || $3 || '},' ||
'{"numer_id": "us.census.acs.B03002009", "numer_timespan": ' || $2 || ', "geom_id": ' || $3 || '},' ||
'{"numer_id": "us.census.acs.B03002002", "numer_timespan": ' || $2 || ', "geom_id": ' || $3 || '},' ||
'{"numer_id": "us.census.acs.B11001001", "numer_timespan": ' || $2 || ', "geom_id": ' || $3 || '},' ||
'{"numer_id": "us.census.acs.B15003001", "numer_timespan": ' || $2 || ', "geom_id": ' || $3 || '},' ||
'{"numer_id": "us.census.acs.B15003017", "numer_timespan": ' || $2 || ', "geom_id": ' || $3 || '},' ||
'{"numer_id": "us.census.acs.B15003019", "numer_timespan": ' || $2 || ', "geom_id": ' || $3 || '},' ||
'{"numer_id": "us.census.acs.B15003020", "numer_timespan": ' || $2 || ', "geom_id": ' || $3 || '},' ||
'{"numer_id": "us.census.acs.B15003021", "numer_timespan": ' || $2 || ', "geom_id": ' || $3 || '},' ||
'{"numer_id": "us.census.acs.B15003022", "numer_timespan": ' || $2 || ', "geom_id": ' || $3 || '},' ||
'{"numer_id": "us.census.acs.B15003023", "numer_timespan": ' || $2 || ', "geom_id": ' || $3 || '},' ||
'{"numer_id": "us.census.acs.B19013001", "numer_timespan": ' || $2 || ', "geom_id": ' || $3 || '},' ||
'{"numer_id": "us.census.acs.B19083001", "numer_timespan": ' || $2 || ', "geom_id": ' || $3 || '},' ||
'{"numer_id": "us.census.acs.B19301001", "numer_timespan": ' || $2 || ', "geom_id": ' || $3 || '},' ||
'{"numer_id": "us.census.acs.B25001001", "numer_timespan": ' || $2 || ', "geom_id": ' || $3 || '},' ||
'{"numer_id": "us.census.acs.B25002003", "numer_timespan": ' || $2 || ', "geom_id": ' || $3 || '},' ||
'{"numer_id": "us.census.acs.B25004002", "numer_timespan": ' || $2 || ', "geom_id": ' || $3 || '},' ||
'{"numer_id": "us.census.acs.B25004004", "numer_timespan": ' || $2 || ', "geom_id": ' || $3 || '},' ||
'{"numer_id": "us.census.acs.B25058001", "numer_timespan": ' || $2 || ', "geom_id": ' || $3 || '},' ||
'{"numer_id": "us.census.acs.B25071001", "numer_timespan": ' || $2 || ', "geom_id": ' || $3 || '},' ||
'{"numer_id": "us.census.acs.B25075001", "numer_timespan": ' || $2 || ', "geom_id": ' || $3 || '},' ||
'{"numer_id": "us.census.acs.B25075025", "numer_timespan": ' || $2 || ', "geom_id": ' || $3 || '},' ||
'{"numer_id": "us.census.acs.B25081002", "numer_timespan": ' || $2 || ', "geom_id": ' || $3 || '},' ||
'{"numer_id": "us.census.acs.B08134001", "numer_timespan": ' || $2 || ', "geom_id": ' || $3 || '},' ||
'{"numer_id": "us.census.acs.B08134002", "numer_timespan": ' || $2 || ', "geom_id": ' || $3 || '},' ||
'{"numer_id": "us.census.acs.B08134003", "numer_timespan": ' || $2 || ', "geom_id": ' || $3 || '},' ||
'{"numer_id": "us.census.acs.B08134004", "numer_timespan": ' || $2 || ', "geom_id": ' || $3 || '},' ||
'{"numer_id": "us.census.acs.B08134005", "numer_timespan": ' || $2 || ', "geom_id": ' || $3 || '},' ||
'{"numer_id": "us.census.acs.B08134006", "numer_timespan": ' || $2 || ', "geom_id": ' || $3 || '},' ||
'{"numer_id": "us.census.acs.B08134007", "numer_timespan": ' || $2 || ', "geom_id": ' || $3 || '},' ||
'{"numer_id": "us.census.acs.B08134008", "numer_timespan": ' || $2 || ', "geom_id": ' || $3 || '},' ||
'{"numer_id": "us.census.acs.B08134009", "numer_timespan": ' || $2 || ', "geom_id": ' || $3 || '},' ||
'{"numer_id": "us.census.acs.B08134010", "numer_timespan": ' || $2 || ', "geom_id": ' || $3 || '},' ||
'{"numer_id": "us.census.acs.B08135001", "numer_timespan": ' || $2 || ', "geom_id": ' || $3 || '},' ||
'{"numer_id": "us.census.acs.B19001002", "numer_timespan": ' || $2 || ', "geom_id": ' || $3 || '},' ||
'{"numer_id": "us.census.acs.B19001003", "numer_timespan": ' || $2 || ', "geom_id": ' || $3 || '},' ||
'{"numer_id": "us.census.acs.B19001004", "numer_timespan": ' || $2 || ', "geom_id": ' || $3 || '},' ||
'{"numer_id": "us.census.acs.B19001005", "numer_timespan": ' || $2 || ', "geom_id": ' || $3 || '},' ||
'{"numer_id": "us.census.acs.B19001006", "numer_timespan": ' || $2 || ', "geom_id": ' || $3 || '},' ||
'{"numer_id": "us.census.acs.B19001007", "numer_timespan": ' || $2 || ', "geom_id": ' || $3 || '},' ||
'{"numer_id": "us.census.acs.B19001008", "numer_timespan": ' || $2 || ', "geom_id": ' || $3 || '},' ||
'{"numer_id": "us.census.acs.B19001009", "numer_timespan": ' || $2 || ', "geom_id": ' || $3 || '},' ||
'{"numer_id": "us.census.acs.B19001010", "numer_timespan": ' || $2 || ', "geom_id": ' || $3 || '},' ||
'{"numer_id": "us.census.acs.B19001011", "numer_timespan": ' || $2 || ', "geom_id": ' || $3 || '},' ||
'{"numer_id": "us.census.acs.B19001012", "numer_timespan": ' || $2 || ', "geom_id": ' || $3 || '},' ||
'{"numer_id": "us.census.acs.B19001013", "numer_timespan": ' || $2 || ', "geom_id": ' || $3 || '},' ||
'{"numer_id": "us.census.acs.B19001014", "numer_timespan": ' || $2 || ', "geom_id": ' || $3 || '},' ||
'{"numer_id": "us.census.acs.B19001015", "numer_timespan": ' || $2 || ', "geom_id": ' || $3 || '},' ||
'{"numer_id": "us.census.acs.B19001016", "numer_timespan": ' || $2 || ', "geom_id": ' || $3 || '},' ||
'{"numer_id": "us.census.acs.B19001017", "numer_timespan": ' || $2 || ', "geom_id": ' || $3 || '}' ||
']')::JSON)
$query$
INTO meta
USING geom,
COALESCE('"' || timespan || '"', 'null'),
COALESCE('"' || boundary_id || '"', 'null');
RETURN QUERY EXECUTE $query$
WITH vals AS (SELECT JSON_Array_Elements(data)->'value' val,
JSON_Array_Elements($2) meta
FROM cdb_observatory.OBS_GetData( ARRAY[($1, 1)::geomval], $2))
SELECT JSON_Build_Object(
'value', val,
'id', meta->'numer_id',
'name', meta->'numer_name',
'type', meta->'numer_type',
'description', meta->'numer_description'
) FROM vals
$query$
USING geom, meta
RETURN;
END;
$$ LANGUAGE plpgsql STABLE;
CREATE OR REPLACE FUNCTION cdb_observatory.OBS_GetMeta(
geom geometry(Geometry, 4326),
params JSON,
num_timespan_options INTEGER DEFAULT NULL, -- how many timespan options to show
num_score_options INTEGER DEFAULT NULL, -- how many score options to show
target_geoms INTEGER DEFAULT NULL
)
RETURNS JSON
AS $$
DECLARE
numer_filters TEXT[];
geom_filters TEXT[];
meta_filter_clause TEXT;
scores_clause TEXT;
result JSON;
BEGIN
IF num_timespan_options IS NULL THEN
num_timespan_options := 1;
END IF;
IF num_score_options IS NULL THEN
num_score_options := 1;
END IF;
numer_filters := (SELECT Array_Agg(val) FILTER (WHERE val IS NOT NULL) FROM (SELECT (JSON_Array_Elements(params))->>'numer_id' val) foo);
geom_filters := (SELECT Array_Agg(val) FILTER (WHERE val IS NOT NULL) FROM (SELECT (JSON_Array_Elements(params))->>'geom_id' val) bar);
meta_filter_clause := '(m.numer_id = ANY ($6) OR m.geom_id = ANY ($7))';
scores_clause := ' agg_geoms AS (
SELECT target_geoms, target_area, ARRAY_AGG(geom_id) geom_ids
FROM meta
GROUP BY target_geoms, target_area
), scores AS (
SELECT target_geoms, target_area,
CASE target_area
-- point-specific, just order by numgeoms instead of score
WHEN 0 THEN scores.numgeoms
-- has some area, use proper scoring
ELSE scores.score
END AS score,
scores.numgeoms, scores.table_id, scores.column_id
FROM agg_geoms,
LATERAL cdb_observatory._OBS_GetGeometryScores($1,
geom_ids, COALESCE(target_geoms, $2), target_area) scores
) ';
IF JSON_Array_Length(params) = 1 THEN
IF numer_filters IS NULL AND geom_filters IS NOT NULL THEN
meta_filter_clause := 'm.geom_id = ($7)[1]';
ELSIF geom_filters IS NULL AND numer_filters IS NOT NULL THEN
meta_filter_clause := 'm.numer_id = ($6)[1]';
ELSIF numer_filters IS NOT NULL AND geom_filters IS NOT NULL THEN
meta_filter_clause := 'm.numer_id = ($6)[1] AND m.geom_id = ($7)[1]';
ELSE
RAISE EXCEPTION 'Must pass either numer_id or geom_id to every key in GetMeta';
END IF;
IF geom_filters IS NOT NULL AND numer_filters IS NOT NULL THEN
scores_clause := 'scores AS (
SELECT NULL::INTEGER target_geoms, NULL::Numeric target_area,
1 score, null, geom_tid table_id, geom_id column_id,
NULL::Integer numgeoms
FROM meta) ';
END IF;
END IF;
EXECUTE format($string$
WITH _filters AS (SELECT
row_number() over () id, *
FROM json_to_recordset($3)
AS x(numer_id TEXT, denom_id TEXT, geom_id TEXT, numer_timespan TEXT,
geom_timespan TEXT, normalization TEXT, max_timespan_rank TEXT,
max_score_rank TEXT, target_geoms INTEGER, target_area Numeric
)
), meta AS (SELECT
id,
f.numer_id,
CASE WHEN f.numer_id IS NULL THEN NULL ELSE numer_aggregate END numer_aggregate,
CASE WHEN f.numer_id IS NULL THEN NULL ELSE numer_colname END numer_colname,
CASE WHEN f.numer_id IS NULL THEN NULL ELSE numer_geomref_colname END numer_geomref_colname,
CASE WHEN f.numer_id IS NULL THEN NULL ELSE numer_tablename END numer_tablename,
CASE WHEN f.numer_id IS NULL THEN NULL ELSE numer_type END numer_type,
CASE WHEN f.numer_id IS NULL THEN NULL ELSE numer_name END numer_name,
CASE WHEN f.numer_id IS NULL THEN NULL ELSE numer_description END numer_description,
CASE WHEN f.numer_id IS NULL THEN NULL ELSE numer_t_description END numer_t_description,
CASE WHEN f.numer_id IS NULL THEN NULL ELSE m.numer_timespan END numer_timespan,
CASE WHEN f.numer_id IS NULL THEN NULL ELSE m.denom_id END denom_id,
CASE WHEN f.numer_id IS NULL THEN NULL ELSE denom_aggregate END denom_aggregate,
CASE WHEN f.numer_id IS NULL THEN NULL ELSE denom_colname END denom_colname,
CASE WHEN f.numer_id IS NULL THEN NULL ELSE denom_geomref_colname END denom_geomref_colname,
CASE WHEN f.numer_id IS NULL THEN NULL ELSE denom_tablename END denom_tablename,
CASE WHEN f.numer_id IS NULL THEN NULL ELSE denom_name END denom_name,
CASE WHEN f.numer_id IS NULL THEN NULL ELSE denom_description END denom_description,
CASE WHEN f.numer_id IS NULL THEN NULL ELSE denom_t_description END denom_t_description,
CASE WHEN f.numer_id IS NULL THEN NULL ELSE denom_type END denom_type,
CASE WHEN f.numer_id IS NULL THEN NULL ELSE denom_reltype END denom_reltype,
m.geom_id,
m.geom_timespan,
geom_colname,
geom_tid,
geom_geomref_colname,
geom_tablename,
geom_name,
geom_description,
geom_t_description,
geom_type,
Coalesce(normalization,
-- automatically assign normalization to numeric numerators
CASE WHEN cdb_observatory.isnumeric(numer_type) THEN
CASE WHEN denom_reltype ILIKE 'denominator' THEN 'denominated'
WHEN numer_aggregate ILIKE 'sum' THEN 'area'
WHEN numer_aggregate IN ('median', 'average') AND denom_reltype ILIKE 'universe'
THEN 'prenormalized'
ELSE 'prenormalized'
END ELSE NULL
END
) normalization,
max_timespan_rank,
max_score_rank,
target_geoms,
target_area
FROM observatory.obs_meta m JOIN _filters f
ON CASE WHEN f.numer_id IS NULL THEN m.geom_id ELSE m.numer_id END =
CASE WHEN f.numer_id IS NULL THEN f.geom_id ELSE f.numer_id END
WHERE
%s
AND (m.numer_id = f.numer_id OR COALESCE(f.numer_id, '') = '')
AND (m.denom_id = f.denom_id OR COALESCE(f.denom_id, '') = '')
AND (m.geom_id = f.geom_id OR COALESCE(f.geom_id, '') = '')
AND (m.geom_timespan = f.geom_timespan OR COALESCE(f.geom_timespan, '') = '')
AND (m.numer_timespan = f.numer_timespan OR COALESCE(f.numer_timespan, '') = '')
), %s
, groups AS (SELECT
id,
scores.score,
numer_timespan,
dense_rank() OVER (PARTITION BY id ORDER BY numer_timespan DESC) timespan_rank,
dense_rank() OVER (PARTITION BY id ORDER BY score DESC) score_rank,
json_build_object(
'id', id,
'numer_id', numer_id,
'timespan_rank', dense_rank() OVER (PARTITION BY id ORDER BY numer_timespan DESC),
'score_rank', dense_rank() OVER (PARTITION BY id ORDER BY score DESC),
'timespan_rownum', row_number() over
(PARTITION BY id, score ORDER BY numer_timespan DESC, Coalesce(denom_id, '')),
'score_rownum', row_number() over
(PARTITION BY id, numer_timespan ORDER BY score DESC, Coalesce(denom_id, '')),
'score', scores.score,
'suggested_name', cdb_observatory.FIRST(
LOWER(TRIM(BOTH '_' FROM regexp_replace(CASE WHEN numer_id IS NOT NULL
THEN CASE
WHEN normalization ILIKE 'area%%' THEN numer_colname || ' per sq km'
WHEN normalization ILIKE 'denom%%' THEN numer_colname || ' rate'
ELSE numer_colname
END || ' ' || numer_timespan
ELSE geom_name || ' ' || geom_timespan
END, '[^a-zA-Z0-9]+', '_', 'g')))
),
'numer_aggregate', cdb_observatory.FIRST(meta.numer_aggregate),
'numer_colname', cdb_observatory.FIRST(meta.numer_colname),
'numer_geomref_colname', cdb_observatory.FIRST(meta.numer_geomref_colname),
'numer_tablename', cdb_observatory.FIRST(meta.numer_tablename),
'numer_type', cdb_observatory.FIRST(meta.numer_type),
'numer_description', cdb_observatory.FIRST(meta.numer_description),
'numer_t_description', cdb_observatory.FIRST(meta.numer_t_description),
'denom_aggregate', cdb_observatory.FIRST(meta.denom_aggregate),
'denom_colname', cdb_observatory.FIRST(denom_colname),
'denom_geomref_colname', cdb_observatory.FIRST(denom_geomref_colname),
'denom_tablename', cdb_observatory.FIRST(denom_tablename),
'denom_type', cdb_observatory.FIRST(meta.denom_type),
'denom_reltype', cdb_observatory.FIRST(meta.denom_reltype),
'denom_description', cdb_observatory.FIRST(meta.denom_description),
'denom_t_description', cdb_observatory.FIRST(meta.denom_t_description),
'geom_colname', cdb_observatory.FIRST(geom_colname),
'geom_geomref_colname', cdb_observatory.FIRST(geom_geomref_colname),
'geom_tablename', cdb_observatory.FIRST(geom_tablename),
'geom_type', cdb_observatory.FIRST(meta.geom_type),
'geom_timespan', cdb_observatory.FIRST(meta.geom_timespan),
'geom_description', cdb_observatory.FIRST(meta.geom_description),
'geom_t_description', cdb_observatory.FIRST(meta.geom_t_description),
'numer_timespan', cdb_observatory.FIRST(numer_timespan),
'numer_name', cdb_observatory.FIRST(numer_name),
'denom_name', cdb_observatory.FIRST(denom_name),
'geom_name', cdb_observatory.FIRST(geom_name),
'normalization', cdb_observatory.FIRST(normalization),
'max_timespan_rank', cdb_observatory.FIRST(max_timespan_rank),
'max_score_rank', cdb_observatory.FIRST(max_score_rank),
'target_geoms', cdb_observatory.FIRST(scores.target_geoms),
'target_area', cdb_observatory.FIRST(scores.target_area),
'num_geoms', cdb_observatory.FIRST(scores.numgeoms),
'denom_id', denom_id,
'geom_id', meta.geom_id
) metadata
FROM meta, scores
WHERE meta.geom_id = scores.column_id
AND meta.geom_tid = scores.table_id
AND COALESCE(meta.target_geoms, 0) = COALESCE(scores.target_geoms, 0)
AND COALESCE(meta.target_area, 0) = COALESCE(scores.target_area, 0)
GROUP BY id, score, numer_id, denom_id, geom_id, numer_timespan
) SELECT JSON_AGG(metadata ORDER BY id)
FROM groups
WHERE timespan_rank <= Coalesce((metadata->>'max_timespan_rank')::INTEGER, 'infinity'::FLOAT)
AND score_rank <= Coalesce((metadata->>'max_score_rank')::INTEGER, 1)
AND (metadata->>'timespan_rownum')::INTEGER <= $4
AND (metadata->>'score_rownum')::INTEGER <= $5
$string$, meta_filter_clause, scores_clause)
INTO result
USING
CASE WHEN ST_GeometryType(geom) = 'ST_Point' THEN
ST_Buffer(geom::geography, 200)::geometry(geometry, 4326)
ELSE geom
END,
target_geoms,
params,
num_timespan_options,
num_score_options, numer_filters, geom_filters
;
RETURN result;
END;
$$ LANGUAGE plpgsql STABLE;
CREATE OR REPLACE FUNCTION cdb_observatory.OBS_GetMeasure(
geom geometry(Geometry, 4326),
measure_id TEXT,
normalize TEXT DEFAULT NULL,
boundary_id TEXT DEFAULT NULL,
time_span TEXT DEFAULT NULL,
simplification NUMERIC DEFAULT 0.00001
)
RETURNS NUMERIC
AS $$
DECLARE
geom_type TEXT;
params JSON;
map_type TEXT;
result Numeric;
numer_aggregate TEXT;
BEGIN
IF geom IS NULL THEN
RETURN NULL;
END IF;
IF simplification IS NOT NULL THEN
geom := ST_Simplify(geom, simplification);
END IF;
IF ST_GeometryType(geom) = 'ST_Point' THEN
geom_type := 'point';
ELSIF ST_GeometryType(geom) IN ('ST_Polygon', 'ST_MultiPolygon') THEN
geom_type := 'polygon';
geom := ST_CollectionExtract(ST_MakeValid(geom), 3);
ELSE
RAISE EXCEPTION 'Invalid geometry type (%), can only handle ''ST_Point'', ''ST_Polygon'', and ''ST_MultiPolygon''',
ST_GeometryType(geom);
END IF;
params := (SELECT cdb_observatory.OBS_GetMeta(
geom, JSON_Build_Array(JSON_Build_Object('numer_id', measure_id,
'geom_id', boundary_id,
'numer_timespan', time_span
)), 1, 1, 500));
numer_aggregate := params->0->>'numer_aggregate';
IF normalize ILIKE 'area%' AND numer_aggregate ILIKE 'sum' THEN
map_type := 'areaNormalized';
ELSIF normalize ILIKE 'denom%' THEN
map_type := 'denominated';
ELSIF normalize ILIKE 'pre%' THEN
map_type := 'predenominated';
ELSE
-- defaults: area normalization for point if it's possible and none for
-- polygon or non-summable point
IF geom_type = 'point' AND numer_aggregate ILIKE 'sum' THEN
map_type := 'areaNormalized';
ELSE
map_type := 'predenominated';
END IF;
END IF;
params := JSON_Build_Array(JSONB_Set((params::JSONB)->0, '{normalization}', to_jsonb(map_type))::JSON);
IF params->0->>'geom_id' IS NULL THEN
RAISE NOTICE 'No boundary found for geom';
RETURN NULL;
ELSE
RAISE NOTICE 'Using boundary %', params->0->>'geom_id';
END IF;
EXECUTE $query$
SELECT (data->0->>'value')::Numeric FROM
cdb_observatory.OBS_GetData(ARRAY[($1, 1)::geomval], $2)
$query$
INTO result
USING geom, params;
RETURN result;
END;
$$ LANGUAGE plpgsql STABLE;
CREATE OR REPLACE FUNCTION cdb_observatory.OBS_GetMeasureById(
geom_ref TEXT,
measure_id TEXT,
boundary_id TEXT,
time_span TEXT DEFAULT NULL
)
RETURNS NUMERIC
AS $$
DECLARE
result NUMERIC;
BEGIN
IF geom_ref IS NULL THEN
RETURN NULL;
ELSIF boundary_id IS NULL THEN
RETURN NULL;
END IF;
EXECUTE $query$
SELECT data->0->>'value'
FROM cdb_observatory.OBS_GetData(Array[$1],
cdb_observatory.OBS_GetMeta(ST_MakeEnvelope(-180, -90, 180, 90, 4326),
JSON_Build_Array(JSON_Build_Object(
'numer_id', $2,
'geom_id', $3,
'numer_timespan', $4,
'normalization', 'predenominated'
))))
$query$
INTO result
USING geom_ref, measure_id, boundary_id, time_span;
RETURN result;
END;
$$ LANGUAGE plpgsql STABLE;
-- GetData that obtains data from array of geomrefs
CREATE OR REPLACE FUNCTION cdb_observatory.OBS_GetData(
geomrefs text[],
params JSON
)
RETURNS TABLE (
id TEXT,
data JSON
)
AS $$
DECLARE
colspecs TEXT;
tables TEXT;
obs_wheres TEXT;
user_wheres TEXT;
q text;
BEGIN
IF params IS NULL OR JSON_ARRAY_LENGTH(params) = 0 THEN
RETURN QUERY EXECUTE $query$ SELECT NULL::TEXT, NULL::JSON LIMIT 0 $query$;
RETURN;
END IF;
EXECUTE
$query$
WITH _meta AS (SELECT
generate_series(1, array_length($1, 1)) colid,
(unnest($1))->>'id' id,
(unnest($1))->>'numer_id' numer_id,
(unnest($1))->>'numer_aggregate' numer_aggregate,
(unnest($1))->>'numer_colname' numer_colname,
(unnest($1))->>'numer_geomref_colname' numer_geomref_colname,
(unnest($1))->>'numer_tablename' numer_tablename,
(unnest($1))->>'numer_type' numer_type,
(unnest($1))->>'denom_id' denom_id,
(unnest($1))->>'denom_aggregate' denom_aggregate,
(unnest($1))->>'denom_colname' denom_colname,
(unnest($1))->>'denom_geomref_colname' denom_geomref_colname,
(unnest($1))->>'denom_tablename' denom_tablename,
(unnest($1))->>'denom_type' denom_type,
(unnest($1))->>'denom_reltype' denom_reltype,
(unnest($1))->>'geom_id' geom_id,
(unnest($1))->>'geom_colname' geom_colname,
(unnest($1))->>'geom_geomref_colname' geom_geomref_colname,
(unnest($1))->>'geom_tablename' geom_tablename,
(unnest($1))->>'geom_type' geom_type,
(unnest($1))->>'geom_timespan' geom_timespan,
(unnest($1))->>'numer_timespan' numer_timespan,
(unnest($1))->>'normalization' normalization,
(unnest($1))->>'api_method' api_method,
(unnest($1))->'api_args' api_args
)
SELECT String_Agg(
-- numeric
'JSON_Build_Object(' || CASE
WHEN api_method IS NOT NULL THEN
'''value'', ' ||
'ARRAY_AGG( ' ||
api_method || '.' || numer_colname || ')::' || numer_type || '[]'
-- numeric internal values
WHEN cdb_observatory.isnumeric(numer_type) THEN
'''value'', ' || CASE
-- denominated
WHEN LOWER(normalization) LIKE 'denom%' OR (normalization IS NULL AND denom_id IS NOT NULL)
THEN 'cdb_observatory.FIRST(' || numer_tablename || '.' || numer_colname ||
' / NullIf(' || denom_tablename || '.' || denom_colname || ', 0))'
-- areaNormalized
WHEN LOWER(normalization) LIKE 'area%' OR (normalization IS NULL AND numer_aggregate ILIKE 'sum')
THEN 'cdb_observatory.FIRST(' || numer_tablename || '.' || numer_colname ||
' / (ST_Area(' || geom_tablename || '.' || geom_colname || '::Geography)/1000000))'
-- prenormalized
ELSE 'cdb_observatory.FIRST(' || numer_tablename || '.' || numer_colname || ')'
END || ':: ' || numer_type
-- categorical/text
WHEN LOWER(numer_type) LIKE 'text' THEN
'''value'', ' || 'cdb_observatory.FIRST(' || numer_tablename || '.' || numer_colname || ') '
-- geometry
WHEN numer_id IS NULL THEN
'''geomref'', ' || 'cdb_observatory.FIRST(' || geom_tablename ||
'.' || geom_geomref_colname || '), ' ||
'''value'', ' || 'cdb_observatory.FIRST(' || geom_tablename ||
'.' || geom_colname || ')'
ELSE ''
END || ')', ', ')
AS colspecs,
(SELECT String_Agg(DISTINCT CASE
-- External API
WHEN tablename LIKE 'cdb_observatory.%' THEN
'LATERAL (SELECT * FROM ' || tablename || ') ' ||
REPLACE(split_part(tablename, '(', 1), 'cdb_observatory.', '')
-- Internal obs_ table
ELSE 'observatory.' || tablename
END, ', ') FROM (
SELECT DISTINCT UNNEST(tablenames_ary) tablename FROM (
SELECT ARRAY_AGG(numer_tablename) ||
ARRAY_AGG(denom_tablename) ||
ARRAY_AGG(geom_tablename) ||
ARRAY_AGG('cdb_observatory.' || api_method || '(_geomrefs.id' || COALESCE(', ' ||
(SELECT STRING_AGG(REPLACE(val::text, '"', ''''), ', ')
FROM (SELECT json_array_elements(api_args) as val) as vals),
'') || ')')
tablenames_ary
) tablenames_inner
) tablenames_outer) tablenames,
String_Agg(DISTINCT array_to_string(ARRAY[
CASE WHEN numer_tablename != geom_tablename
THEN numer_tablename || '.' || numer_geomref_colname || ' = ' ||
geom_tablename || '.' || geom_geomref_colname
ELSE NULL END,
CASE WHEN numer_tablename != denom_tablename
THEN numer_tablename || '.' || numer_geomref_colname || ' = ' ||
denom_tablename || '.' || denom_geomref_colname
ELSE NULL END
], ' AND '),
' AND ') AS obs_wheres,
String_Agg(geom_tablename || '.' || geom_geomref_colname || ' = ' ||
'_geomrefs.id', ' AND ')
AS user_wheres
FROM _meta
;
$query$
INTO colspecs, tables, obs_wheres, user_wheres
USING (SELECT ARRAY(SELECT json_array_elements_text(params))::json[]);
RETURN QUERY EXECUTE format($query$
WITH _geomrefs AS (SELECT UNNEST($1) as id)
SELECT _geomrefs.id, Array_to_JSON(ARRAY[%s]::JSON[])
FROM _geomrefs, %s
%s
GROUP BY _geomrefs.id
ORDER BY _geomrefs.id
$query$, colspecs, tables,
'WHERE ' || NULLIF(ARRAY_TO_STRING(ARRAY[
Nullif(obs_wheres, ''), Nullif(user_wheres, '')
], ' AND '), '')
)
USING geomrefs;
RETURN;
END;
$$ LANGUAGE plpgsql STABLE;
-- GetData that obtains data from array of (geom, id) geomvals.
CREATE OR REPLACE FUNCTION cdb_observatory.OBS_GetData(
geomvals geomval[],
params JSON,
merge BOOLEAN DEFAULT True
)
RETURNS TABLE (
id INT,
data JSON
)
AS $$
DECLARE
procgeom_clauses TEXT;
val_clauses TEXT;
json_clause TEXT;
geomtype TEXT;
BEGIN
IF params IS NULL OR JSON_ARRAY_LENGTH(params) = 0 OR ARRAY_LENGTH(geomvals, 1) IS NULL THEN
RETURN QUERY EXECUTE $query$ SELECT NULL::INT, NULL::JSON LIMIT 0 $query$;
RETURN;
END IF;
geomtype := ST_GeometryType(geomvals[1].geom);
/* Read metadata to generate clauses for query */
EXECUTE $query$
WITH _meta AS (SELECT
row_number() over () colid, *
FROM json_to_recordset($1)
AS x(id TEXT, numer_id TEXT, numer_aggregate TEXT, numer_colname TEXT,
numer_geomref_colname TEXT, numer_tablename TEXT, numer_type TEXT,
denom_id TEXT, denom_aggregate TEXT, denom_colname TEXT,
denom_geomref_colname TEXT, denom_tablename TEXT, denom_type TEXT,
denom_reltype TEXT, geom_id TEXT, geom_colname TEXT,
geom_geomref_colname TEXT, geom_tablename TEXT, geom_type TEXT,
numer_timespan TEXT, geom_timespan TEXT, normalization TEXT,
api_method TEXT, api_args JSON)
),
-- Generate procgeom clauses.
-- These join the users' geoms to the relevant geometries for the
-- asked-for measures in the Observatory.
_procgeom_clauses AS (
SELECT
'_procgeoms_' || Coalesce(geom_tablename || '_' || geom_geomref_colname, api_method) || ' AS (' ||
CASE WHEN api_method IS NULL THEN
'SELECT _geoms.id, ' ||
CASE $3 WHEN True THEN '_geoms.geom'
ELSE geom_tablename || '.' || geom_colname
END || ' AS geom, ' ||
geom_tablename || '.' || geom_geomref_colname || ' AS geomref, ' ||
CASE
WHEN $2 = 'ST_Point' THEN
' Nullif(ST_Area(' || geom_tablename || '.' || geom_colname || '::Geography), 0)/1000000 ' ||
' AS area'
-- for numeric areas, include more complex calcs
ELSE
'CASE WHEN ST_Within(_geoms.geom, ' || geom_tablename || '.' || geom_colname || ')
THEN ST_Area(_geoms.geom) / Nullif(ST_Area(' || geom_tablename || '.' || geom_colname || '), 0)
WHEN ST_Within(' || geom_tablename || '.' || geom_colname || ', _geoms.geom)
THEN 1
ELSE ST_Area(cdb_observatory.safe_intersection(_geoms.geom, ' || geom_tablename || '.' || geom_colname || ')) /
Nullif(ST_Area(' || geom_tablename || '.' || geom_colname || '), 0)
END pct_obs'
END || '
FROM _geoms, observatory.' || geom_tablename || '
WHERE ST_Intersects(_geoms.geom, ' || geom_tablename || '.' || geom_colname || ')'
-- pass through input geometries for api_method
ELSE 'SELECT _geoms.id, _geoms.geom FROM _geoms'
END ||
') '
AS procgeom_clause
FROM _meta
GROUP BY api_method, geom_tablename, geom_geomref_colname, geom_colname
),
-- Generate val clauses.
-- These perform interpolations or other necessary calculations to
-- provide values according to users geometries.
_val_clauses AS (
SELECT
'_vals_' || Coalesce(geom_tablename || '_' || geom_geomref_colname, api_method) || ' AS (
SELECT _procgeoms.id, ' ||
String_Agg('json_build_object(' || CASE
-- api-delivered values
WHEN api_method IS NOT NULL THEN
'''value'', ' ||
'ARRAY_AGG( ' ||
api_method || '.' || numer_colname || ')::' || numer_type || '[]'
-- numeric internal values
WHEN cdb_observatory.isnumeric(numer_type) THEN
'''value'', ' || CASE
-- denominated
WHEN LOWER(normalization) LIKE 'denom%'
THEN CASE
WHEN denom_tablename IS NULL THEN ' NULL '
-- denominated point-in-poly
WHEN $2 = 'ST_Point' THEN
' cdb_observatory.FIRST(' || numer_tablename || '.' || numer_colname ||
' / NullIf(' || denom_tablename || '.' || denom_colname || ', 0))'
-- denominated polygon interpolation
-- SUM (numer * (% OBS geom in user geom)) / SUM (denom * (% OBS geom in user geom))
ELSE
' SUM(' || numer_tablename || '.' || numer_colname || ' ' ||
' * _procgeoms.pct_obs ' ||
' ) / NULLIF(SUM(' || denom_tablename || '.' || denom_colname || ' ' ||
' * _procgeoms.pct_obs), 0) '
END
-- areaNormalized
WHEN LOWER(normalization) LIKE 'area%'
THEN CASE
-- areaNormalized point-in-poly
WHEN $2 = 'ST_Point' THEN
' cdb_observatory.FIRST(' || numer_tablename || '.' || numer_colname ||
' / _procgeoms.area)'
-- areaNormalized polygon interpolation
-- SUM (numer * (% OBS geom in user geom)) / area of big geom
ELSE
--' NULL END '
' SUM(' || numer_tablename || '.' || numer_colname || ' ' ||
' * _procgeoms.pct_obs' ||
' ) / (Nullif(ST_Area(cdb_observatory.FIRST(_procgeoms.geom)::Geography), 0) / 1000000) '
END
-- median/average measures with universe
WHEN LOWER(numer_aggregate) IN ('median', 'average') AND
denom_reltype ILIKE 'universe' AND LOWER(normalization) LIKE 'pre%'
THEN CASE
-- predenominated point-in-poly
WHEN $2 = 'ST_Point' THEN
' cdb_observatory.FIRST(' || numer_tablename || '.' || numer_colname || ') '
ELSE
-- predenominated polygon interpolation weighted by universe
-- SUM (numer * denom * (% user geom in OBS geom)) / SUM (denom * (% user geom in OBS geom))
-- (10 * 1000 * 1) / (1000 * 1) = 10
-- (10 * 1000 * 1 + 50 * 10 * 1) / (1000 + 10) = 10500 / 10000 = 10.5
' SUM(' || numer_tablename || '.' || numer_colname ||
' * ' || denom_tablename || '.' || denom_colname ||
' * _procgeoms.pct_obs ' ||
' ) / Nullif(SUM(' || denom_tablename || '.' || denom_colname ||
' * _procgeoms.pct_obs ' || '), 0) '
END
-- prenormalized for summable measures. point or summable only!
WHEN numer_aggregate ILIKE 'sum' AND LOWER(normalization) LIKE 'pre%'
THEN CASE
-- predenominated point-in-poly
WHEN $2 = 'ST_Point' THEN
' cdb_observatory.FIRST(' || numer_tablename || '.' || numer_colname || ') '
ELSE
-- predenominated polygon interpolation
-- SUM (numer * (% user geom in OBS geom))
' SUM(' || numer_tablename || '.' || numer_colname || ' ' ||
' * _procgeoms.pct_obs) '
END
-- Everything else. Point only!
ELSE CASE
WHEN $2 = 'ST_Point' THEN
' cdb_observatory.FIRST(' || numer_tablename || '.' || numer_colname || ') '
ELSE
' cdb_observatory._OBS_RaiseNotice(''Cannot perform calculation over polygon for ' ||
numer_id || '/' || coalesce(denom_id, '') || '/' || geom_id || '/' || numer_timespan || ''')::Numeric '
END
END || '::' || numer_type
-- categorical/text
WHEN LOWER(numer_type) LIKE 'text' THEN
'''value'', ' || 'MODE() WITHIN GROUP (ORDER BY ' || numer_tablename || '.' || numer_colname || ') '
-- geometry
WHEN numer_id IS NULL THEN
'''geomref'', _procgeoms.geomref, ' ||
'''value'', ' || 'cdb_observatory.FIRST(_procgeoms.geom)::TEXT'
-- code below will return the intersection of the user's geom and the
-- OBS geom
--'''value'', ' || 'ST_Union(cdb_observatory.safe_intersection(_geoms.geom, ' || geom_tablename ||
-- '.' || geom_colname || '))::TEXT'
ELSE ''
END
|| ') val_' || colid, ', ')
|| '
FROM _procgeoms_' || Coalesce(geom_tablename || '_' || geom_geomref_colname, api_method) || ' _procgeoms ' ||
Coalesce(', ' || String_Agg(DISTINCT
Coalesce('observatory.' || numer_tablename,
'LATERAL (SELECT * FROM cdb_observatory.' || api_method || '(_procgeoms.geom' || Coalesce(', ' ||
(SELECT STRING_AGG(REPLACE(val::text, '"', ''''), ', ')
FROM (SELECT JSON_Array_Elements(api_args) as val) as vals),
'') || ')) AS ' || api_method)
, ', '), '') ||
Coalesce(' WHERE ' || String_Agg(DISTINCT
'_procgeoms.geomref = ' || numer_tablename || '.' || numer_geomref_colname, ' AND '
), '') ||
CASE $3 WHEN True THEN E'\n GROUP BY _procgeoms.id ORDER BY _procgeoms.id '
ELSE E'\n GROUP BY _procgeoms.id, _procgeoms.geomref
ORDER BY _procgeoms.id, _procgeoms.geomref' END
|| ')'
AS val_clause,
'_vals_' || Coalesce(geom_tablename || '_' || geom_geomref_colname, api_method) AS cte_name
FROM _meta
GROUP BY geom_tablename, geom_geomref_colname, geom_colname, api_method
),
-- Generate clauses necessary to join together val_clauses
_val_joins AS (
SELECT String_Agg(a.cte_name || '.id = ' || b.cte_name || '.id ', ' AND ') val_joins
FROM _val_clauses a, _val_clauses b
WHERE a.cte_name != b.cte_name
AND a.cte_name < b.cte_name
),
-- Generate JSON clause. This puts together vals from val_clauses
_json_clause AS (SELECT
'SELECT ' || cdb_observatory.FIRST(cte_name) || '.id::INT,
Array_to_JSON(ARRAY[' || (SELECT String_Agg('val_' || colid, ', ') FROM _meta) || '])
FROM ' || String_Agg(cte_name, ', ') ||
Coalesce(' WHERE ' || val_joins, '')
AS json_clause
FROM _val_clauses, _val_joins
GROUP BY val_joins
)
SELECT (SELECT String_Agg(procgeom_clause, E',\n ') FROM _procgeom_clauses),
(SELECT String_Agg(val_clause, E',\n ') FROM _val_clauses),
json_clause
FROM _json_clause
$query$ INTO
procgeom_clauses,
val_clauses,
json_clause
USING params, geomtype, merge;
/* Execute query */
RETURN QUERY EXECUTE format($query$
WITH _raw_geoms AS (%s),
_geoms AS (SELECT id,
CASE WHEN (ST_NPoints(geom) > 1000)
THEN ST_CollectionExtract(ST_MakeValid(ST_SimplifyVW(geom, 0.00001)), 3)
ELSE geom END geom
FROM _raw_geoms),
-- procgeom_clauses
%s,
-- val_clauses
%s
-- json_clause
%s
$query$, CASE WHEN ARRAY_LENGTH(geomvals, 1) = 1
THEN ' SELECT $1[1].val as id, $1[1].geom as geom '
ELSE ' SELECT val as id, geom FROM UNNEST($1) '
END,
String_Agg(procgeom_clauses, E',\n '),
String_Agg(val_clauses, E',\n '),
json_clause)
USING geomvals;
RETURN;
END;
$$ LANGUAGE plpgsql STABLE;
CREATE OR REPLACE FUNCTION cdb_observatory.OBS_GetCategory(
geom geometry(Geometry, 4326),
category_id TEXT,
boundary_id TEXT DEFAULT NULL,
time_span TEXT DEFAULT NULL,
simplification NUMERIC DEFAULT 0.00001
)
RETURNS TEXT
AS $$
DECLARE
geom_type TEXT;
params JSON;
map_type TEXT;
result TEXT;
BEGIN
IF geom IS NULL THEN
RETURN NULL;
END IF;
IF simplification IS NOT NULL THEN
geom := ST_Simplify(geom, simplification);
END IF;
IF ST_GeometryType(geom) = 'ST_Point' THEN
geom_type := 'point';
ELSIF ST_GeometryType(geom) IN ('ST_Polygon', 'ST_MultiPolygon') THEN
geom_type := 'polygon';
geom := ST_CollectionExtract(ST_MakeValid(geom), 3);
ELSE
RAISE EXCEPTION 'Invalid geometry type (%), can only handle ''ST_Point'', ''ST_Polygon'', and ''ST_MultiPolygon''',
ST_GeometryType(geom);
END IF;
params := (SELECT cdb_observatory.OBS_GetMeta(
geom, JSON_Build_Array(JSON_Build_Object('numer_id', category_id,
'geom_id', boundary_id,
'numer_timespan', time_span
)), 1, 1, 500));
IF params->0->>'geom_id' IS NULL THEN
RAISE NOTICE 'No boundary found for geom';
RETURN NULL;
ELSE
RAISE NOTICE 'Using boundary %', params->0->>'geom_id';
END IF;
EXECUTE $query$
SELECT data->0->>'value' FROM
cdb_observatory.OBS_GetData(ARRAY[($1, 1)::geomval], $2)
$query$
INTO result
USING geom, params;
RETURN result;
END;
$$ LANGUAGE plpgsql STABLE;
CREATE OR REPLACE FUNCTION cdb_observatory.OBS_GetUSCensusMeasure(
geom geometry(Geometry, 4326),
name TEXT,
normalize TEXT DEFAULT NULL,
boundary_id TEXT DEFAULT NULL,
time_span TEXT DEFAULT NULL
)
RETURNS NUMERIC AS $$
DECLARE
standardized_name text;
measure_id text;
result Numeric;
BEGIN
standardized_name = cdb_observatory._OBS_StandardizeMeasureName(name);
EXECUTE $string$
SELECT c.id
FROM observatory.obs_column c
JOIN observatory.obs_column_tag ct
ON c.id = ct.column_id
WHERE cdb_observatory._OBS_StandardizeMeasureName(c.name) = $1
AND ct.tag_id ILIKE 'us.census%'
$string$
INTO measure_id
USING standardized_name;
EXECUTE 'SELECT cdb_observatory.OBS_GetMeasure($1, $2, $3, $4, $5)'
INTO result
USING geom, measure_id, normalize, boundary_id, time_span;
RETURN result;
END;
$$ LANGUAGE plpgsql STABLE;
CREATE OR REPLACE FUNCTION cdb_observatory.OBS_GetUSCensusCategory(
geom geometry(Geometry, 4326),
name TEXT,
boundary_id TEXT DEFAULT NULL,
time_span TEXT DEFAULT NULL
)
RETURNS TEXT AS $$
DECLARE
standardized_name TEXT;
category_id TEXT;
result TEXT;
BEGIN
standardized_name = cdb_observatory._OBS_StandardizeMeasureName(name);
EXECUTE $string$
SELECT c.id
FROM observatory.obs_column c
--JOIN observatory.obs_column_tag ct
-- ON c.id = ct.column_id
WHERE cdb_observatory._OBS_StandardizeMeasureName(c.name) = $1
AND c.type ILIKE 'TEXT'
AND c.id ILIKE 'us.census%' -- TODO this should be done by tag
--AND ct.tag_id = 'us.census.acs.demographics'
$string$
INTO category_id
USING standardized_name;
EXECUTE 'SELECT cdb_observatory.OBS_GetCategory($1, $2, $3, $4)'
INTO result
USING geom, category_id, boundary_id, time_span;
RETURN result;
END;
$$ LANGUAGE plpgsql STABLE;
CREATE OR REPLACE FUNCTION cdb_observatory.OBS_GetPopulation(
geom geometry(Geometry, 4326),
normalize TEXT DEFAULT NULL,
boundary_id TEXT DEFAULT NULL,
time_span TEXT DEFAULT NULL
)
RETURNS NUMERIC
AS $$
DECLARE
population_measure_id TEXT;
result Numeric;
BEGIN
-- TODO use a super-column for global pop
population_measure_id := 'us.census.acs.B01003001';
EXECUTE $query$ SELECT cdb_observatory.OBS_GetMeasure(
$1, $2, $3, $4, $5
) LIMIT 1
$query$
INTO result
USING geom, population_measure_id, normalize, boundary_id, time_span;
RETURN result;
END;
$$ LANGUAGE plpgsql STABLE;
CREATE OR REPLACE FUNCTION cdb_observatory.OBS_GetSegmentSnapshot(
geom geometry(Geometry, 4326),
boundary_id text DEFAULT NULL
)
RETURNS JSON
AS $$
DECLARE
meta JSON;
data JSON;
result JSON;
BEGIN
boundary_id = COALESCE(boundary_id, 'us.census.tiger.census_tract');
EXECUTE $query$
SELECT cdb_observatory.OBS_GetMeta($1, ('[ ' ||
'{"numer_id": "us.census.acs.B01003001_quantile", "geom_id": ' || $2 || '},' ||
'{"numer_id": "us.census.acs.B01001002_quantile", "geom_id": ' || $2 || '},' ||
'{"numer_id": "us.census.acs.B01001026_quantile", "geom_id": ' || $2 || '},' ||
'{"numer_id": "us.census.acs.B01002001_quantile", "geom_id": ' || $2 || '},' ||
'{"numer_id": "us.census.acs.B03002003_quantile", "geom_id": ' || $2 || '},' ||
'{"numer_id": "us.census.acs.B03002004_quantile", "geom_id": ' || $2 || '},' ||
'{"numer_id": "us.census.acs.B03002006_quantile", "geom_id": ' || $2 || '},' ||
'{"numer_id": "us.census.acs.B03002012_quantile", "geom_id": ' || $2 || '},' ||
'{"numer_id": "us.census.acs.B05001006_quantile", "geom_id": ' || $2 || '},' ||
'{"numer_id": "us.census.acs.B08006001_quantile", "geom_id": ' || $2 || '},' ||
'{"numer_id": "us.census.acs.B08006002_quantile", "geom_id": ' || $2 || '},' ||
'{"numer_id": "us.census.acs.B08301010_quantile", "geom_id": ' || $2 || '},' ||
'{"numer_id": "us.census.acs.B08006009_quantile", "geom_id": ' || $2 || '},' ||
'{"numer_id": "us.census.acs.B08006011_quantile", "geom_id": ' || $2 || '},' ||
'{"numer_id": "us.census.acs.B08006015_quantile", "geom_id": ' || $2 || '},' ||
'{"numer_id": "us.census.acs.B08006017_quantile", "geom_id": ' || $2 || '},' ||
'{"numer_id": "us.census.acs.B09001001_quantile", "geom_id": ' || $2 || '},' ||
'{"numer_id": "us.census.acs.B11001001_quantile", "geom_id": ' || $2 || '},' ||
'{"numer_id": "us.census.acs.B14001001_quantile", "geom_id": ' || $2 || '},' ||
'{"numer_id": "us.census.acs.B14001002_quantile", "geom_id": ' || $2 || '},' ||
'{"numer_id": "us.census.acs.B14001005_quantile", "geom_id": ' || $2 || '},' ||
'{"numer_id": "us.census.acs.B14001006_quantile", "geom_id": ' || $2 || '},' ||
'{"numer_id": "us.census.acs.B14001007_quantile", "geom_id": ' || $2 || '},' ||
'{"numer_id": "us.census.acs.B14001008_quantile", "geom_id": ' || $2 || '},' ||
'{"numer_id": "us.census.acs.B15003001_quantile", "geom_id": ' || $2 || '},' ||
'{"numer_id": "us.census.acs.B15003017_quantile", "geom_id": ' || $2 || '},' ||
'{"numer_id": "us.census.acs.B15003022_quantile", "geom_id": ' || $2 || '},' ||
'{"numer_id": "us.census.acs.B15003023_quantile", "geom_id": ' || $2 || '},' ||
'{"numer_id": "us.census.acs.B16001001_quantile", "geom_id": ' || $2 || '},' ||
'{"numer_id": "us.census.acs.B16001002_quantile", "geom_id": ' || $2 || '},' ||
'{"numer_id": "us.census.acs.B16001003_quantile", "geom_id": ' || $2 || '},' ||
'{"numer_id": "us.census.acs.B17001001_quantile", "geom_id": ' || $2 || '},' ||
'{"numer_id": "us.census.acs.B17001002_quantile", "geom_id": ' || $2 || '},' ||
'{"numer_id": "us.census.acs.B19013001_quantile", "geom_id": ' || $2 || '},' ||
'{"numer_id": "us.census.acs.B19083001_quantile", "geom_id": ' || $2 || '},' ||
'{"numer_id": "us.census.acs.B19301001_quantile", "geom_id": ' || $2 || '},' ||
'{"numer_id": "us.census.acs.B25001001_quantile", "geom_id": ' || $2 || '},' ||
'{"numer_id": "us.census.acs.B25002003_quantile", "geom_id": ' || $2 || '},' ||
'{"numer_id": "us.census.acs.B25004002_quantile", "geom_id": ' || $2 || '},' ||
'{"numer_id": "us.census.acs.B25004004_quantile", "geom_id": ' || $2 || '},' ||
'{"numer_id": "us.census.acs.B25058001_quantile", "geom_id": ' || $2 || '},' ||
'{"numer_id": "us.census.acs.B25071001_quantile", "geom_id": ' || $2 || '},' ||
'{"numer_id": "us.census.acs.B25075001_quantile", "geom_id": ' || $2 || '},' ||
'{"numer_id": "us.census.acs.B25075025_quantile", "geom_id": ' || $2 || '},' ||
'{"numer_id": "us.census.spielman_singleton_segments.X10", "geom_id": ' || $2 || '},' ||
'{"numer_id": "us.census.spielman_singleton_segments.X55", "geom_id": ' || $2 || '}' ||
']')::JSON)
$query$
INTO meta
USING geom, COALESCE('"' || boundary_id || '"', 'null');
EXECUTE $query$
SELECT data FROM cdb_observatory.OBS_GetData(
ARRAY[($1, 1)::geomval], $2)
$query$
INTO data
USING geom, meta;
EXECUTE $query$
WITH els AS (SELECT
REPLACE(REPLACE(JSON_Array_Elements($1)->>'numer_id',
'us.census.spielman_singleton_segments.X55', 'x55_segment'),
'us.census.spielman_singleton_segments.X10', 'x10_segment') k,
JSON_Array_Elements($2)->>'value' v)
SELECT JSON_Object_Agg(k, v) FROM els
$query$
INTO result
USING meta, data;
RETURN result;
END;
$$ LANGUAGE plpgsql STABLE;
-- TODO: implement search for timespan
CREATE OR REPLACE FUNCTION cdb_observatory._OBS_SearchTables(
search_term text,
time_span text DEFAULT NULL
)
RETURNS table(tablename text, timespan text)
As $$
DECLARE
out_var text[];
BEGIN
IF time_span IS NULL
THEN
RETURN QUERY
EXECUTE
'SELECT tablename::text, timespan::text
FROM observatory.obs_table t
JOIN observatory.obs_column_table ct
ON ct.table_id = t.id
JOIN observatory.obs_column c
ON ct.column_id = c.id
WHERE c.type ILIKE ''geometry''
AND c.id = $1'
USING search_term;
RETURN;
ELSE
RETURN QUERY
EXECUTE
'SELECT tablename::text, timespan::text
FROM observatory.obs_table t
JOIN observatory.obs_column_table ct
ON ct.table_id = t.id
JOIN observatory.obs_column c
ON ct.column_id = c.id
WHERE c.type ILIKE ''geometry''
AND c.id = $1
AND t.timespan = $2'
USING search_term, time_span;
RETURN;
END IF;
END;
$$ LANGUAGE plpgsql IMMUTABLE;
-- Functions used to search the observatory for measures
--------------------------------------------------------------------------------
-- TODO allow the user to specify the boundary to search for measures
--
CREATE OR REPLACE FUNCTION cdb_observatory.OBS_Search(
search_term text,
relevant_boundary text DEFAULT null
)
RETURNS TABLE(id text, description text, name text, aggregate text, source text) as $$
DECLARE
boundary_term text;
BEGIN
IF relevant_boundary then
boundary_term = '';
else
boundary_term = '';
END IF;
RETURN QUERY
EXECUTE format($string$
SELECT id::text, description::text,
name::text,
aggregate::text,
NULL::TEXT source -- TODO use tags
FROM observatory.OBS_column
where name ilike '%%' || %L || '%%'
or description ilike '%%' || %L || '%%'
%s
$string$, search_term, search_term,boundary_term);
RETURN;
END
$$ LANGUAGE plpgsql;
-- Functions to return the geometry levels that a point is part of
--------------------------------------------------------------------------------
-- TODO add test response
CREATE OR REPLACE FUNCTION cdb_observatory.OBS_GetAvailableBoundaries(
geom geometry(Geometry, 4326),
timespan text DEFAULT null)
RETURNS TABLE(boundary_id text, description text, time_span text, tablename text) as $$
DECLARE
timespan_query TEXT DEFAULT '';
BEGIN
IF timespan != NULL
THEN
timespan_query = format('AND timespan = %L', timespan);
END IF;
RETURN QUERY
EXECUTE
$string$
SELECT
column_id::text As column_id,
obs_column.description::text As description,
timespan::text As timespan,
tablename::text As tablename
FROM
observatory.OBS_table,
observatory.OBS_column_table,
observatory.OBS_column
WHERE
observatory.OBS_column_table.column_id = observatory.obs_column.id AND
observatory.OBS_column_table.table_id = observatory.obs_table.id
AND
observatory.OBS_column.type = 'Geometry'
AND
ST_Intersects($1, st_setsrid(observatory.obs_table.the_geom, 4326))
$string$ || timespan_query
USING geom;
RETURN;
END
$$ LANGUAGE plpgsql;
-- Functions the interface works from to identify available numerators,
-- denominators, geometries, and timespans
CREATE OR REPLACE FUNCTION cdb_observatory.OBS_GetAvailableNumerators(
bounds GEOMETRY DEFAULT NULL,
filter_tags TEXT[] DEFAULT NULL,
denom_id TEXT DEFAULT NULL,
geom_id TEXT DEFAULT NULL,
timespan TEXT DEFAULT NULL
) RETURNS TABLE (
numer_id TEXT,
numer_name TEXT,
numer_description TEXT,
numer_weight NUMERIC,
numer_license TEXT,
numer_source TEXT,
numer_type TEXT,
numer_aggregate TEXT,
numer_extra JSONB,
numer_tags JSONB,
valid_denom BOOLEAN,
valid_geom BOOLEAN,
valid_timespan BOOLEAN
) AS $$
DECLARE
geom_clause TEXT;
BEGIN
filter_tags := COALESCE(filter_tags, (ARRAY[])::TEXT[]);
denom_id := COALESCE(denom_id, '');
geom_id := COALESCE(geom_id, '');
timespan := COALESCE(timespan, '');
IF bounds IS NULL THEN
geom_clause := '';
ELSE
geom_clause := 'ST_Intersects(the_geom, $5) AND';
END IF;
RETURN QUERY
EXECUTE
format($string$
SELECT numer_id::TEXT,
numer_name::TEXT,
numer_description::TEXT,
numer_weight::NUMERIC,
NULL::TEXT license,
NULL::TEXT source,
numer_type numer_type,
numer_aggregate numer_aggregate,
numer_extra::JSONB numer_extra,
numer_tags numer_tags,
$1 = ANY(denoms) valid_denom,
$2 = ANY(geoms) valid_geom,
$3 = ANY(timespans) valid_timespan
FROM observatory.obs_meta_numer
WHERE %s (numer_tags ?& $4 OR CARDINALITY($4) = 0)
$string$, geom_clause)
USING denom_id, geom_id, timespan, filter_tags, bounds;
RETURN;
END
$$ LANGUAGE plpgsql;
CREATE OR REPLACE FUNCTION cdb_observatory.OBS_GetAvailableDenominators(
bounds GEOMETRY DEFAULT NULL,
filter_tags TEXT[] DEFAULT NULL,
numer_id TEXT DEFAULT NULL,
geom_id TEXT DEFAULT NULL,
timespan TEXT DEFAULT NULL
) RETURNS TABLE (
denom_id TEXT,
denom_name TEXT,
denom_description TEXT,
denom_weight NUMERIC,
denom_license TEXT,
denom_source TEXT,
denom_type TEXT,
denom_aggregate TEXT,
denom_extra JSONB,
denom_tags JSONB,
valid_numer BOOLEAN,
valid_geom BOOLEAN,
valid_timespan BOOLEAN
) AS $$
DECLARE
geom_clause TEXT;
BEGIN
filter_tags := COALESCE(filter_tags, (ARRAY[])::TEXT[]);
numer_id := COALESCE(numer_id, '');
geom_id := COALESCE(geom_id, '');
timespan := COALESCE(timespan, '');
IF bounds IS NULL THEN
geom_clause := '';
ELSE
geom_clause := 'ST_Intersects(the_geom, $5) AND';
END IF;
RETURN QUERY
EXECUTE
format($string$
SELECT denom_id::TEXT,
denom_name::TEXT,
denom_description::TEXT,
denom_weight::NUMERIC,
NULL::TEXT license,
NULL::TEXT source,
denom_type::TEXT,
denom_aggregate::TEXT,
denom_extra::JSONB,
denom_tags::JSONB,
$1 = ANY(numers) valid_numer,
$2 = ANY(geoms) valid_geom,
$3 = ANY(timespans) valid_timespan
FROM observatory.obs_meta_denom
WHERE %s (denom_tags ?& $4 OR CARDINALITY($4) = 0)
$string$, geom_clause)
USING numer_id, geom_id, timespan, filter_tags, bounds;
RETURN;
END
$$ LANGUAGE plpgsql;
CREATE OR REPLACE FUNCTION cdb_observatory.OBS_GetAvailableGeometries(
bounds GEOMETRY DEFAULT NULL,
filter_tags TEXT[] DEFAULT NULL,
numer_id TEXT DEFAULT NULL,
denom_id TEXT DEFAULT NULL,
timespan TEXT DEFAULT NULL
) RETURNS TABLE (
geom_id TEXT,
geom_name TEXT,
geom_description TEXT,
geom_weight NUMERIC,
geom_aggregate TEXT,
geom_license TEXT,
geom_source TEXT,
geom_type TEXT,
geom_extra JSONB,
geom_tags JSONB,
valid_numer BOOLEAN,
valid_denom BOOLEAN,
valid_timespan BOOLEAN,
score NUMERIC,
numtiles BIGINT,
notnull_percent NUMERIC,
numgeoms NUMERIC,
percentfill NUMERIC,
estnumgeoms NUMERIC,
meanmediansize NUMERIC
) AS $$
DECLARE
geom_clause TEXT;
BEGIN
filter_tags := COALESCE(filter_tags, (ARRAY[])::TEXT[]);
numer_id := COALESCE(numer_id, '');
denom_id := COALESCE(denom_id, '');
timespan := COALESCE(timespan, '');
IF bounds IS NULL THEN
geom_clause := '';
ELSE
geom_clause := 'ST_Intersects(the_geom, $5) AND';
END IF;
RETURN QUERY
EXECUTE
format($string$
WITH available_geoms AS (
SELECT geom_id::TEXT,
geom_name::TEXT,
geom_description::TEXT,
geom_weight::NUMERIC,
NULL::TEXT geom_aggregate,
NULL::TEXT license,
NULL::TEXT source,
geom_type::TEXT,
geom_extra::JSONB,
geom_tags::JSONB,
$1 = ANY(numers) valid_numer,
$2 = ANY(denoms) valid_denom,
$3 = ANY(timespans) valid_timespan
FROM observatory.obs_meta_geom
WHERE %s (geom_tags ?& $4 OR CARDINALITY($4) = 0)
), scores AS (
SELECT * FROM cdb_observatory._OBS_GetGeometryScores($5,
(SELECT ARRAY_AGG(geom_id) FROM available_geoms)
)
) SELECT available_geoms.*, score, numtiles, notnull_percent, numgeoms,
percentfill, estnumgeoms, meanmediansize
FROM available_geoms, scores
WHERE available_geoms.geom_id = scores.column_id
$string$, geom_clause)
USING numer_id, denom_id, timespan, filter_tags, bounds;
RETURN;
END
$$ LANGUAGE plpgsql;
CREATE OR REPLACE FUNCTION cdb_observatory.OBS_GetAvailableTimespans(
bounds GEOMETRY DEFAULT NULL,
filter_tags TEXT[] DEFAULT NULL,
numer_id TEXT DEFAULT NULL,
denom_id TEXT DEFAULT NULL,
geom_id TEXT DEFAULT NULL
) RETURNS TABLE (
timespan_id TEXT,
timespan_name TEXT,
timespan_description TEXT,
timespan_weight NUMERIC,
timespan_aggregate TEXT,
timespan_license TEXT,
timespan_source TEXT,
timespan_type TEXT,
timespan_extra JSONB,
timespan_tags JSONB,
valid_numer BOOLEAN,
valid_denom BOOLEAN,
valid_geom BOOLEAN
) AS $$
DECLARE
geom_clause TEXT;
BEGIN
filter_tags := COALESCE(filter_tags, (ARRAY[])::TEXT[]);
numer_id := COALESCE(numer_id, '');
denom_id := COALESCE(denom_id, '');
geom_id := COALESCE(geom_id, '');
IF bounds IS NULL THEN
geom_clause := '';
ELSE
geom_clause := 'ST_Intersects(the_geom, $5) AND';
END IF;
RETURN QUERY
EXECUTE
format($string$
SELECT timespan_id::TEXT,
timespan_name::TEXT,
timespan_description::TEXT,
timespan_weight::NUMERIC,
NULL::TEXT timespan_aggregate,
NULL::TEXT timespan_license,
NULL::TEXT timespan_source,
NULL::TEXT timespan_type,
NULL::JSONB timespan_extra,
NULL::JSONB timespan_tags,
$1 = ANY(numers) valid_numer,
$2 = ANY(denoms) valid_denom,
$3 = ANY(geoms) valid_geom_id
FROM observatory.obs_meta_timespan
WHERE %s (timespan_tags ?& $4 OR CARDINALITY($4) = 0)
$string$, geom_clause)
USING numer_id, denom_id, geom_id, filter_tags, bounds;
RETURN;
END
$$ LANGUAGE plpgsql;
-- Function below should replace SQL in
-- https://github.com/CartoDB/cartodb/blob/ab465cb2918c917940e955963b0cd8a050c06600/lib/assets/javascripts/cartodb3/editor/layers/layer-content-views/analyses/data-observatory-metadata.js
CREATE OR REPLACE FUNCTION cdb_observatory.OBS_LegacyBuilderMetadata(
aggregate_type TEXT DEFAULT NULL
)
RETURNS TABLE (
name TEXT,
subsection JSONB
) AS $$
DECLARE
aggregate_condition TEXT DEFAULT '';
BEGIN
IF LOWER(aggregate_type) ILIKE 'sum' THEN
aggregate_condition := ' AND numer_aggregate IN (''sum'', ''median'', ''average'') ';
ELSIF aggregate_type IS NOT NULL THEN
aggregate_condition := format(' AND numer_aggregate ILIKE %L ', aggregate_type);
END IF;
RETURN QUERY
EXECUTE format($string$
WITH expanded AS (
SELECT JSONB_Build_Object('id', numer_id, 'name', numer_name) "column",
SUBSTR((sections).key, 9) section_id, (sections).value section_name,
SUBSTR((subsections).key, 12) subsection_id, (subsections).value subsection_name
FROM (
SELECT numer_id, numer_name,
jsonb_each_text(numer_tags) as sections,
jsonb_each_text as subsections
FROM (SELECT numer_id, numer_name, numer_tags,
jsonb_each_text(numer_tags)
FROM cdb_observatory.obs_getavailablenumerators()
WHERE numer_weight > 0 %s
) foo
) bar
WHERE (sections).key LIKE 'section/%%'
AND (subsections).key LIKE 'subsection/%%'
), grouped_by_subsections AS (
SELECT JSONB_Agg(JSONB_Build_Object('f1', "column")) AS columns,
section_id, section_name, subsection_id, subsection_name
FROM expanded
GROUP BY section_id, section_name, subsection_id, subsection_name
)
SELECT section_name as name, JSONB_Agg(
JSONB_Build_Object(
'f1', JSONB_Build_Object(
'name', subsection_name,
'id', subsection_id,
'columns', columns
)
)
) as subsection
FROM grouped_by_subsections
GROUP BY section_name
$string$, aggregate_condition);
RETURN;
END
$$ LANGUAGE plpgsql;
CREATE OR REPLACE FUNCTION cdb_observatory._OBS_GetGeometryScores(
bounds Geometry(Geometry, 4326) DEFAULT NULL,
filter_geom_ids TEXT[] DEFAULT NULL,
desired_num_geoms INTEGER DEFAULT NULL,
desired_area NUMERIC DEFAULT NULL
) RETURNS TABLE (
score NUMERIC,
numtiles BIGINT,
table_id TEXT,
column_id TEXT,
notnull_percent NUMERIC,
numgeoms NUMERIC,
percentfill NUMERIC,
estnumgeoms NUMERIC,
meanmediansize NUMERIC
) AS $$
DECLARE
num_geoms_multiplier Numeric;
BEGIN
IF desired_num_geoms IS NULL THEN
desired_num_geoms := 3000;
END IF;
filter_geom_ids := COALESCE(filter_geom_ids, (ARRAY[])::TEXT[]);
-- Very complex geometries simply fail. For a boundary check, we can
-- comfortably get away with the simplicity of an envelope
IF ST_Npoints(bounds) > 10000 THEN
bounds := ST_Envelope(bounds);
END IF;
IF desired_area IS NULL THEN
desired_area := ST_Area(bounds);
END IF;
-- In case of points, desired_area will be 0. We still want an accurate
-- estimate of numgeoms in that case.
IF desired_area = 0 THEN
num_geoms_multiplier := 1;
ELSE
num_geoms_multiplier := Coalesce(desired_area / Nullif(ST_Area(bounds), 0), 1);
END IF;
RETURN QUERY
EXECUTE $string$
WITH clipped_geom AS (
SELECT column_id, table_id
, CASE WHEN $1 IS NOT NULL THEN ST_Clip(tile, $1, True) -- -20
ELSE tile END clipped_tile
, tile
FROM observatory.obs_column_table_tile_simple
WHERE ($1 IS NULL OR ST_Intersects($1, tile))
AND (column_id = ANY($2) OR cardinality($2) = 0)
), clipped_geom_countagg AS (
SELECT column_id, table_id
, BOOL_AND(ST_BandIsNoData(clipped_tile, 1)) nodata
FROM clipped_geom
GROUP BY column_id, table_id
), clipped_geom_reagg AS (
SELECT COUNT(*)::BIGINT cnt, a.column_id, a.table_id,
cdb_observatory.FIRST(nodata) first_nodata,
cdb_observatory.FIRST(tile) first_tile,
(ST_SummaryStatsAgg(clipped_tile, 1, False)).sum::Numeric sum_geoms, -- ND
(ST_SummaryStatsAgg(clipped_tile, 2, False)).mean::Numeric / 255 mean_fill --ND
FROM clipped_geom_countagg a, clipped_geom b
WHERE a.table_id = b.table_id
AND a.column_id = b.column_id
GROUP BY a.column_id, a.table_id
), final AS (
SELECT
cnt, table_id, column_id
, NULL::Numeric AS notnull_percent
, (CASE WHEN first_nodata IS FALSE
THEN sum_geoms
ELSE COALESCE(ST_Value(first_tile, 1, ST_PointOnSurface($1)), 0)
* (ST_Area($1) / ST_Area(ST_PixelAsPolygon(first_tile, 0, 0)))
END)::Numeric * $4
AS numgeoms
, (CASE WHEN first_nodata IS FALSE
THEN mean_fill
ELSE COALESCE(ST_Value(first_tile, 2, ST_PointOnSurface($1))::Numeric / 255, 0) -- -2
END)::Numeric
AS percentfill
, null::numeric estnumgeoms
, null::numeric meanmediansize
FROM clipped_geom_reagg
) SELECT
((100.0 / (1+abs(log(0.0001 + $3) - log(0.0001 + numgeoms::Numeric)))) * percentfill)::Numeric
AS score, *
FROM final
$string$ USING bounds, filter_geom_ids, desired_num_geoms, num_geoms_multiplier;
RETURN;
END
$$ LANGUAGE plpgsql IMMUTABLE;
-- Data Observatory -- Welcome to the Future
-- These Data Observatory functions provide access to boundary polyons (and
-- their ids) such as those available through the US Census Tiger, Who's on
-- First, the Spanish Census, and so on
-- OBS_GetBoundary
--
-- Returns the boundary polygon(s) that overlap with the input point geometry.
-- From an input point geometry, find the boundary which intersects with the
-- centroid of the input geometry
-- Inputs:
-- geom geometry: input point geometry
-- boundary_id text: source id of boundaries
-- see function OBS_ListGeomColumns for all avaiable
-- boundary ids
-- time_span text: time span that the geometries were collected (optional)
--
-- Output:
-- boundary geometry: geometry boundary that intersects with geom, is at the
-- resolution requested with boundary_id, and time_span
--
CREATE OR REPLACE FUNCTION cdb_observatory.OBS_GetBoundary(
geom geometry(Point, 4326),
boundary_id text,
time_span text DEFAULT NULL)
RETURNS geometry(Geometry, 4326)
AS $$
DECLARE
boundary geometry(Geometry, 4326);
target_table text;
BEGIN
-- TODO: Check if SRID = 4326, if not transform?
-- if not a point, raise error
IF ST_GeometryType(geom) != 'ST_Point'
THEN
RAISE EXCEPTION 'Invalid geometry type (%), expecting ''ST_Point''', ST_GeometryType(geom);
END IF;
-- return the first boundary in intersections
EXECUTE $query$
SELECT * FROM cdb_observatory._OBS_GetBoundariesByGeometry($1, $2, $3) LIMIT 1
$query$ INTO boundary
USING geom, boundary_id, time_span;
RETURN boundary;
END;
$$ LANGUAGE plpgsql;
-- OBS_GetBoundaryId
--
-- retrieves the boundary identifier (e.g., '36047' = Kings County/Brooklyn, NY)
-- corresponding to the location geom and boundary types (e.g.,
-- us.census.tiger.county)
-- Inputs:
-- geom geometry: location where the boundary is requested to overlap with
-- boundary_id text: source id of boundaries (e.g., us.census.tiger.county)
-- see function OBS_ListGeomColumns for all avaiable
-- boundary ids
-- time_span text: time span that the geometries were collected (optional)
--
-- Output:
-- geometry_id text: identifier of the geometry which overlaps with the input
-- point geom in the table corresponding to boundary_id and
-- time_span
--
CREATE OR REPLACE FUNCTION cdb_observatory.OBS_GetBoundaryId(
geom geometry(Point, 4326),
boundary_id text,
time_span text DEFAULT NULL
)
RETURNS text
AS $$
DECLARE
result TEXT;
BEGIN
EXECUTE $query$
SELECT geom_refs FROM cdb_observatory._OBS_GetBoundariesByGeometry(
$1, $2, $3) LIMIT 1
$query$
INTO result
USING geom, boundary_id, time_span;
RETURN result;
END;
$$ LANGUAGE plpgsql;
-- OBS_GetBoundaryById
--
-- Given a geometry reference (e.g., geoid for US Census), and it's geometry
-- level (see OBS_ListGeomColumns() for all available boundary ids), give back
-- the boundary that corresponds to that geometry_id, boundary_id, and
-- time_span
-- Inputs:
-- geometry_id text: geometry id of the requested boundary
-- boundary_id text: source id of boundaries (e.g., us.census.tiger.county)
-- see function OBS_ListGeomColumns for all avaiable
-- boundary ids
-- time_span text: time span that the geometries were collected (optional)
--
-- Output:
-- boundary geometry: geometry boundary that matches geometry_id, is at the
-- resolution requested with boundary_id, and time_span
--
CREATE OR REPLACE FUNCTION cdb_observatory.OBS_GetBoundaryById(
geometry_id text, -- ex: '36047'
boundary_id text, -- ex: 'us.census.tiger.county'
time_span text DEFAULT NULL -- ex: '2009'
)
RETURNS geometry(geometry, 4326)
AS $$
DECLARE
result GEOMETRY;
BEGIN
EXECUTE $query$
SELECT (data->0->>'value')::Geometry
FROM cdb_observatory.OBS_GetData(
ARRAY[$1],
cdb_observatory.OBS_GetMeta(
ST_MakeEnvelope(-180, -90, 180, 90, 4326),
('[{"geom_id": "' || $2 || '"}]')::JSON))
$query$
INTO result
USING geometry_id, boundary_id;
RETURN result;
END;
$$ LANGUAGE plpgsql;
-- _OBS_GetBoundariesByGeometry
-- internal function for retrieving geometries based on an input geometry
-- see OBS_GetBoundariesByGeometry or OBS_GetBoundariesByPointAndRadius for
-- more information
CREATE OR REPLACE FUNCTION cdb_observatory._OBS_GetBoundariesByGeometry(
geom geometry(Geometry, 4326),
boundary_id text,
time_span text DEFAULT NULL,
overlap_type text DEFAULT NULL)
RETURNS TABLE (
the_geom geometry,
geom_refs text
) AS $$
DECLARE
meta JSON;
BEGIN
overlap_type := COALESCE(overlap_type, 'intersects');
-- check inputs
IF lower(overlap_type) NOT IN ('contains', 'intersects', 'within')
THEN
-- recognized overlap type (map to ST_Contains, ST_Intersects, and ST_Within)
RAISE EXCEPTION 'Overlap type ''%'' is not an accepted type (choose intersects, within, or contains)', overlap_type;
END IF;
EXECUTE $query$
SELECT cdb_observatory.OBS_GetMeta($1, JSON_Build_Array(JSON_Build_Object(
'geom_id', $2, 'geom_timespan', $3)))
$query$
INTO meta
USING geom, boundary_id, time_span;
IF meta->0->>'geom_id' IS NULL THEN
RETURN QUERY EXECUTE 'SELECT NULL::Geometry, NULL::Text LIMIT 0';
RETURN;
END IF;
-- return first boundary in intersections
RETURN QUERY EXECUTE $query$
SELECT (data->0->>'value')::Geometry the_geom, data->0->>'geomref' geom_refs
FROM cdb_observatory.OBS_GetData(
ARRAY[($1, 1)::geomval], $2, False
)
$query$ USING geom, meta;
RETURN;
END;
$$ LANGUAGE plpgsql;
-- OBS_GetBoundariesByGeometry
--
-- Given a bounding box (or a polygon), and it's geometry level (see
-- OBS_ListGeomColumns() for all available boundary ids), give back the
-- boundaries that are contained within the bounding box polygon and the
-- associated geometry ids
-- Inputs:
-- geom geometry: bounding box (or polygon) of the region of interest
-- boundary_id text: source id of boundaries (e.g., us.census.tiger.county)
-- see function OBS_ListGeomColumns for all avaiable
-- boundary ids
-- time_span text: time span that the geometries were collected (optional)
--
-- Output:
-- table with the following columns
-- boundary geometry: geometry boundary that is contained within the input
-- bounding box at the requested geometry level
-- with boundary_id, and time_span
-- geom_refs text: geometry identifiers (e.g., geoid for the US Census)
--
CREATE OR REPLACE FUNCTION cdb_observatory.OBS_GetBoundariesByGeometry(
geom geometry(Geometry, 4326),
boundary_id text,
time_span text DEFAULT NULL,
overlap_type text DEFAULT NULL)
RETURNS TABLE(the_geom geometry, geom_refs text)
AS $$
BEGIN
RETURN QUERY SELECT *
FROM cdb_observatory._OBS_GetBoundariesByGeometry(
geom,
boundary_id,
time_span,
overlap_type
);
RETURN;
END;
$$ LANGUAGE plpgsql;
-- OBS_GetBoundariesByPointAndRadius
--
-- Given a point and radius, and it's geometry level (see
-- OBS_ListGeomColumns() for all available boundary ids), give back the
-- boundaries that are contained within the point buffered by radius meters and
-- the associated geometry ids
-- Inputs:
-- geom geometry: point geometry centered on area of interest
-- radius numeric: radius (in meters) of a circle centered on geom for
-- selecting polygons
-- boundary_id text: source id of boundaries (e.g., us.census.tiger.county)
-- see function OBS_ListGeomColumns for all avaiable
-- boundary ids
-- time_span text: time span that the geometries were collected (optional)
--
-- Output:
-- table with the following columns
-- boundary geometry: geometry boundary that is contained within the input
-- bounding box at the requested geometry level
-- with boundary_id, and time_span
-- geom_refs text: geometry identifiers (e.g., geoid for the US Census)
--
-- TODO: move to ST_DWithin instead of buffer + intersects?
CREATE OR REPLACE FUNCTION cdb_observatory.OBS_GetBoundariesByPointAndRadius(
geom geometry(Point, 4326), -- point
radius numeric, -- radius in meters
boundary_id text,
time_span text DEFAULT NULL,
overlap_type text DEFAULT NULL)
RETURNS TABLE(the_geom geometry, geom_refs text)
AS $$
DECLARE
circle_boundary geometry(Geometry, 4326);
BEGIN
IF ST_GeometryType(geom) != 'ST_Point'
THEN
RAISE EXCEPTION 'Input geometry ''%'' is not a point', ST_AsText(geom);
ELSE
circle_boundary := ST_Buffer(geom::geography, radius)::geometry;
END IF;
RETURN QUERY SELECT *
FROM cdb_observatory._OBS_GetBoundariesByGeometry(
circle_boundary,
boundary_id,
time_span,
overlap_type);
RETURN;
END;
$$ LANGUAGE plpgsql;
-- _OBS_GetPointsByGeometry
CREATE OR REPLACE FUNCTION cdb_observatory._OBS_GetPointsByGeometry(
geom geometry(Geometry, 4326),
boundary_id text,
time_span text DEFAULT NULL,
overlap_type text DEFAULT NULL)
RETURNS TABLE(the_geom geometry, geom_refs text)
AS $$
DECLARE
boundary geometry(Geometry, 4326);
geom_colname text;
geoid_colname text;
target_table text;
BEGIN
overlap_type := COALESCE(overlap_type, 'intersects');
IF lower(overlap_type) NOT IN ('contains', 'within', 'intersects')
THEN
RAISE EXCEPTION 'Overlap type ''%'' is not an accepted type (choose intersects, within, or contains)', overlap_type;
ELSIF ST_GeometryType(geom) NOT IN ('ST_Polygon', 'ST_MultiPolygon')
THEN
RAISE EXCEPTION 'Invalid geometry type (%), expecting ''ST_MultiPolygon'' or ''ST_Polygon''', ST_GeometryType(geom);
END IF;
-- return first boundary in intersections
RETURN QUERY EXECUTE $query$
SELECT ST_PointOnSurface(the_geom), geom_refs
FROM cdb_observatory._OBS_GetBoundariesByGeometry($1, $2)
$query$ USING geom, boundary_id;
RETURN;
END;
$$ LANGUAGE plpgsql;
-- OBS_GetPointsByGeometry
--
-- Given a polygon, and it's geometry level (see
-- OBS_ListGeomColumns() for all available boundary ids), give back a point
-- which lies in a boundary from the requested geometry level that is contained
-- within the bounding box polygon and the associated geometry ids
--
-- Inputs:
-- geom geometry: bounding box (or polygon) of the region of interest
-- boundary_id text: source id of boundaries (e.g., us.census.tiger.county)
-- see function OBS_ListGeomColumns for all avaiable
-- boundary ids
-- time_span text: time span that the geometries were collected (optional)
--
-- Output:
-- table with the following columns
-- boundary geometry: point that lies on a boundary that is contained within
-- the input bounding box at the requested geometry
-- level with boundary_id, and time_span
-- geom_refs text: geometry identifiers (e.g., geoid for the US Census)
--
CREATE OR REPLACE FUNCTION cdb_observatory.OBS_GetPointsByGeometry(
geom geometry(Geometry, 4326),
boundary_id text,
time_span text DEFAULT NULL,
overlap_type text DEFAULT NULL)
RETURNS TABLE(the_geom geometry, geom_refs text)
AS $$
BEGIN
RETURN QUERY SELECT *
FROM cdb_observatory._OBS_GetPointsByGeometry(
geom,
boundary_id,
time_span,
overlap_type);
RETURN;
END;
$$ LANGUAGE plpgsql;
-- OBS_GetBoundariesByPointAndRadius
--
-- Given a point and radius, and it's geometry level (see
-- OBS_ListGeomColumns() for all available boundary ids), give back the
-- boundaries that are contained within the point buffered by radius meters and
-- the associated geometry ids
-- Inputs:
-- geom geometry: point geometry centered on area of interest
-- radius numeric: radius (in meters) of a circle centered on geom for
-- selecting polygons
-- boundary_id text: source id of boundaries (e.g., us.census.tiger.county)
-- see function OBS_ListGeomColumns for all avaiable
-- boundary ids
-- time_span text: time span that the geometries were collected (optional)
--
-- Output:
-- table with the following columns
-- boundary geometry: geometry boundary that is contained within the input
-- bounding box at the requested geometry level
-- with boundary_id, and time_span
-- geom_refs text: geometry identifiers (e.g., geoid for the US Census)
--
CREATE OR REPLACE FUNCTION cdb_observatory.OBS_GetPointsByPointAndRadius(
geom geometry(Point, 4326), -- point
radius numeric, -- radius in meters
boundary_id text,
time_span text DEFAULT NULL,
overlap_type text DEFAULT NULL)
RETURNS TABLE(the_geom geometry, geom_refs text)
AS $$
DECLARE
circle_boundary geometry(Geometry, 4326);
BEGIN
IF ST_GeometryType(geom) != 'ST_Point'
THEN
RAISE EXCEPTION 'Input geometry ''%'' is not a point', ST_AsText(geom);
ELSE
circle_boundary := ST_Buffer(geom::geography, radius)::geometry;
END IF;
RETURN QUERY SELECT *
FROM cdb_observatory._OBS_GetPointsByGeometry(
ST_Buffer(geom::geography, radius)::geometry,
boundary_id,
time_span,
overlap_type);
RETURN;
END;
$$ LANGUAGE plpgsql;
-- Placeholder for permission tweaks at creation time.
-- Make sure by default there are no permissions for publicuser
-- NOTE: this happens at extension creation time, as part of an implicit transaction.
-- REVOKE ALL PRIVILEGES ON SCHEMA cdb_observatory FROM PUBLIC, publicuser CASCADE;
-- Grant permissions on the schema to publicuser (but just the schema)
-- GRANT USAGE ON SCHEMA cdb_crankshaft TO publicuser;
-- Revoke execute permissions on all functions in the schema by default
-- REVOKE EXECUTE ON ALL FUNCTIONS IN SCHEMA cdb_observatory FROM PUBLIC, publicuser;
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