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-- Creo tabella | |
CREATE TABLE "tmp_lineMerge" AS | |
SELECT ROW_NUMBER() OVER(ORDER BY pk) AS RowNum, | |
ST_LineMerge(ST_Union(geom)) AS geom, | |
tipo, | |
count(*) as nro, | |
group_concat (pk) as pk_old -- occhio!!! | |
FROM "linee" | |
GROUP BY tipo | |
order by 3; | |
-- Ricovero la geometria | |
SELECT RecoverGeometryColumn('tmp_lineMerge','geom',3004,'Linestring','XY'); | |
-- Dump geometria | |
SELECT ElementaryGeometries( 'tmp_lineMerge' , | |
'geom' , 'lines_merge_tipo' ,'out_pk' , 'out_multi_id', 1 ) as num, 'lines' as label; |
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