create a geojson object of an aggregated array in postgresql
I have a table that has three columns: id , geometry and a text column which is an aggregated array of several columns in one. I want to create a geojson object but it does not let me. could you please help me with that!
T1
id | tag_frequency | geom
1 | "[frame,1]", "[big,3]" | 00000046875
and here is the query I used to create the object and write in a file
copy (SELECT jsonb_build_object(
'type', 'FeatureCollection',
'features', jsonb_agg(feature)
)
FROM (
SELECT jsonb_build_object(
'type', 'Feature',
'id', id,
'geometry', ST_AsGeoJSON(geom)::jsonb,
'properties', to_jsonb(inputs) - 'id' - 'geom'
) AS feature
FROM (
SELECT * FROM T1
) inputs
) features)to '...test.geojson';
however the tag column has been retrieved from another table using following query to have the frequency of all the words associated with each id.
SELECT id, geom, array_agg('[' || tags || ',' || frequency || ']')
as tag_frequency
FROM
(SELECT id, geom, tags, count(tags) AS frequency
FROM tt
GROUP BY id, geom, tags order by tags) AS RES
GROUP BY id, geom;
arrays postgresql full-text-search geojson
asked Nov 13 '18 at 16:07
Raha1986Raha1986
1701113
add a comment |
I have a table that has three columns: id , geometry and a text column which is an aggregated array of several columns in one. I want to create a geojson object but it does not let me. could you please help me with that!
T1
id | tag_frequency | geom
1 | "[frame,1]", "[big,3]" | 00000046875
and here is the query I used to create the object and write in a file
copy (SELECT jsonb_build_object(
'type', 'FeatureCollection',
'features', jsonb_agg(feature)
)
FROM (
SELECT jsonb_build_object(
'type', 'Feature',
'id', id,
'geometry', ST_AsGeoJSON(geom)::jsonb,
'properties', to_jsonb(inputs) - 'id' - 'geom'
) AS feature
FROM (
SELECT * FROM T1
) inputs
) features)to '...test.geojson';
however the tag column has been retrieved from another table using following query to have the frequency of all the words associated with each id.
SELECT id, geom, array_agg('[' || tags || ',' || frequency || ']')
as tag_frequency
FROM
(SELECT id, geom, tags, count(tags) AS frequency
FROM tt
GROUP BY id, geom, tags order by tags) AS RES
GROUP BY id, geom;
arrays postgresql full-text-search geojson
asked Nov 13 '18 at 16:07
Raha1986Raha1986
1701113
add a comment |
I have a table that has three columns: id , geometry and a text column which is an aggregated array of several columns in one. I want to create a geojson object but it does not let me. could you please help me with that!
T1
id | tag_frequency | geom
1 | "[frame,1]", "[big,3]" | 00000046875
and here is the query I used to create the object and write in a file
copy (SELECT jsonb_build_object(
'type', 'FeatureCollection',
'features', jsonb_agg(feature)
)
FROM (
SELECT jsonb_build_object(
'type', 'Feature',
'id', id,
'geometry', ST_AsGeoJSON(geom)::jsonb,
'properties', to_jsonb(inputs) - 'id' - 'geom'
) AS feature
FROM (
SELECT * FROM T1
) inputs
) features)to '...test.geojson';
however the tag column has been retrieved from another table using following query to have the frequency of all the words associated with each id.
SELECT id, geom, array_agg('[' || tags || ',' || frequency || ']')
as tag_frequency
FROM
(SELECT id, geom, tags, count(tags) AS frequency
FROM tt
GROUP BY id, geom, tags order by tags) AS RES
GROUP BY id, geom;
arrays postgresql full-text-search geojson
asked Nov 13 '18 at 16:07
Raha1986Raha1986
1701113
I have a table that has three columns: id , geometry and a text column which is an aggregated array of several columns in one. I want to create a geojson object but it does not let me. could you please help me with that!
T1
id | tag_frequency | geom
1 | "[frame,1]", "[big,3]" | 00000046875
and here is the query I used to create the object and write in a file
copy (SELECT jsonb_build_object(
'type', 'FeatureCollection',
'features', jsonb_agg(feature)
)
FROM (
SELECT jsonb_build_object(
'type', 'Feature',
'id', id,
'geometry', ST_AsGeoJSON(geom)::jsonb,
'properties', to_jsonb(inputs) - 'id' - 'geom'
) AS feature
FROM (
SELECT * FROM T1
) inputs
) features)to '...test.geojson';
however the tag column has been retrieved from another table using following query to have the frequency of all the words associated with each id.
SELECT id, geom, array_agg('[' || tags || ',' || frequency || ']')
as tag_frequency
FROM
(SELECT id, geom, tags, count(tags) AS frequency
FROM tt
GROUP BY id, geom, tags order by tags) AS RES
GROUP BY id, geom;
arrays postgresql full-text-search geojson
arrays postgresql full-text-search geojson
asked Nov 13 '18 at 16:07
Raha1986Raha1986
1701113
asked Nov 13 '18 at 16:07
Raha1986Raha1986
1701113
edited Nov 13 '18 at 16:23
Raha1986
asked Nov 13 '18 at 16:07
Raha1986Raha1986
1701113
asked Nov 13 '18 at 16:07
Raha1986Raha1986
1701113
asked Nov 13 '18 at 16:07
Raha1986Raha1986
1701113
1701113
add a comment |
add a comment |
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