56 lines
1.4 KiB
SQL
56 lines
1.4 KiB
SQL
WITH pk AS (
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-- la liste des PK à traiter
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SELECT pk_id
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FROM phase_5_pk
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WHERE length_real = 0
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--AND pk_id BETWEEN 77 AND 81
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),
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pgr_vertices AS (
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-- une table avec les id des vertex du réseau routage les plus proches de tous les PK
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SELECT
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ROW_NUMBER() OVER(PARTITION BY pk.pk_id ORDER BY ST_Distance(pk.the_geom, v.the_geom) ASC) AS RANK
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,pk.pk_id
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,v.id AS vertice_id
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,ST_Distance(pk.the_geom, v.the_geom) AS distance
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--,pk.the_geom
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FROM phase_5_pk pk, phase_3_troncons_pgr_vertices_pgr v
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WHERE
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ST_DWithin(pk.the_geom, v.the_geom, 25)
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ORDER BY pk.pk_id, distance ASC
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),
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t_from AS (
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SELECT
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p.pk_id AS pk_from
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,v.vertice_id AS v_from
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,(p.pk_id+1) AS pk_to
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FROM pk p JOIN pgr_vertices v ON p.pk_id = v.pk_id
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WHERE v.RANK = 1
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),
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t_base AS (
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-- la table voulue avec les infos pour calculer un routage
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SELECT
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p.pk_from
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,v_from
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,p.pk_to
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,v.vertice_id AS v_to
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FROM t_from p JOIN pgr_vertices v ON p.pk_to = v.pk_id
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WHERE v.RANK = 1
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),
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t_final AS (
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SELECT
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t.pk_from
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,t.pk_to
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,(
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SELECT TRUNC(a.agg_cost::numeric,0)
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FROM pgr_dijkstraCost('SELECT id, source, target, cost, reverse_cost FROM phase_3_troncons_pgr WHERE source IS NOT NULL', t.v_from, t.v_to) AS a
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) AS length_real
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FROM t_base t
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)
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-- SELECT * FROM t_final
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-- UPDATE final
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UPDATE phase_5_pk o
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SET length_real = t.length_real
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FROM t_final t
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WHERE o.pk_id = t.pk_from ;
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