--- /dev/null
+BEGIN;
+
+SELECT evergreen.upgrade_deps_block_check('0852', :eg_version);
+
+CREATE OR REPLACE FUNCTION action.hold_copy_calculated_proximity(
+ ahr_id INT,
+ acp_id BIGINT,
+ copy_context_ou INT DEFAULT NULL
+ -- TODO maybe? hold_context_ou INT DEFAULT NULL. This would optionally
+ -- support an "ahprox" measurement: adjust prox between copy circ lib and
+ -- hold request lib, but I'm unsure whether to use this theoretical
+ -- argument only in the baseline calculation or later in the other
+ -- queries in this function.
+) RETURNS NUMERIC AS $f$
+DECLARE
+ aoupa actor.org_unit_proximity_adjustment%ROWTYPE;
+ ahr action.hold_request%ROWTYPE;
+ acp asset.copy%ROWTYPE;
+ acn asset.call_number%ROWTYPE;
+ acl asset.copy_location%ROWTYPE;
+ baseline_prox NUMERIC;
+
+ icl_list INT[];
+ iol_list INT[];
+ isl_list INT[];
+ hpl_list INT[];
+ hrl_list INT[];
+
+BEGIN
+
+ SELECT * INTO ahr FROM action.hold_request WHERE id = ahr_id;
+ SELECT * INTO acp FROM asset.copy WHERE id = acp_id;
+ SELECT * INTO acn FROM asset.call_number WHERE id = acp.call_number;
+ SELECT * INTO acl FROM asset.copy_location WHERE id = acp.location;
+
+ IF copy_context_ou IS NULL THEN
+ copy_context_ou := acp.circ_lib;
+ END IF;
+
+ -- First, gather the baseline proximity of "here" to pickup lib
+ SELECT prox INTO baseline_prox FROM actor.org_unit_proximity WHERE from_org = copy_context_ou AND to_org = ahr.pickup_lib;
+
+ -- Find any absolute adjustments, and set the baseline prox to that
+ SELECT adj.* INTO aoupa
+ FROM actor.org_unit_proximity_adjustment adj
+ LEFT JOIN actor.org_unit_ancestors_distance(copy_context_ou) acp_cl ON (acp_cl.id = adj.item_circ_lib)
+ LEFT JOIN actor.org_unit_ancestors_distance(acn.owning_lib) acn_ol ON (acn_ol.id = adj.item_owning_lib)
+ LEFT JOIN actor.org_unit_ancestors_distance(acl.owning_lib) acl_ol ON (acl_ol.id = adj.copy_location)
+ LEFT JOIN actor.org_unit_ancestors_distance(ahr.pickup_lib) ahr_pl ON (ahr_pl.id = adj.hold_pickup_lib)
+ LEFT JOIN actor.org_unit_ancestors_distance(ahr.request_lib) ahr_rl ON (ahr_rl.id = adj.hold_request_lib)
+ WHERE (adj.circ_mod IS NULL OR adj.circ_mod = acp.circ_modifier) AND
+ (adj.item_circ_lib IS NULL OR adj.item_circ_lib = acp_cl.id) AND
+ (adj.item_owning_lib IS NULL OR adj.item_owning_lib = acn_ol.id) AND
+ (adj.copy_location IS NULL OR adj.copy_location = acl_ol.id) AND
+ (adj.hold_pickup_lib IS NULL OR adj.hold_pickup_lib = ahr_pl.id) AND
+ (adj.hold_request_lib IS NULL OR adj.hold_request_lib = ahr_rl.id) AND
+ absolute_adjustment AND
+ COALESCE(acp_cl.id, acn_ol.id, acl_ol.id, ahr_pl.id, ahr_rl.id) IS NOT NULL
+ ORDER BY
+ COALESCE(acp_cl.distance,999)
+ + COALESCE(acn_ol.distance,999)
+ + COALESCE(acl_ol.distance,999)
+ + COALESCE(ahr_pl.distance,999)
+ + COALESCE(ahr_rl.distance,999),
+ adj.pos
+ LIMIT 1;
+
+ IF FOUND THEN
+ baseline_prox := aoupa.prox_adjustment;
+ END IF;
+
+ -- Now find any relative adjustments, and change the baseline prox based on them
+ FOR aoupa IN
+ SELECT adj.*
+ FROM actor.org_unit_proximity_adjustment adj
+ LEFT JOIN actor.org_unit_ancestors_distance(copy_context_ou) acp_cl ON (acp_cl.id = adj.item_circ_lib)
+ LEFT JOIN actor.org_unit_ancestors_distance(acn.owning_lib) acn_ol ON (acn_ol.id = adj.item_owning_lib)
+ LEFT JOIN actor.org_unit_ancestors_distance(acl.owning_lib) acl_ol ON (acn_ol.id = adj.copy_location)
+ LEFT JOIN actor.org_unit_ancestors_distance(ahr.pickup_lib) ahr_pl ON (ahr_pl.id = adj.hold_pickup_lib)
+ LEFT JOIN actor.org_unit_ancestors_distance(ahr.request_lib) ahr_rl ON (ahr_rl.id = adj.hold_request_lib)
+ WHERE (adj.circ_mod IS NULL OR adj.circ_mod = acp.circ_modifier) AND
+ (adj.item_circ_lib IS NULL OR adj.item_circ_lib = acp_cl.id) AND
+ (adj.item_owning_lib IS NULL OR adj.item_owning_lib = acn_ol.id) AND
+ (adj.copy_location IS NULL OR adj.copy_location = acl_ol.id) AND
+ (adj.hold_pickup_lib IS NULL OR adj.hold_pickup_lib = ahr_pl.id) AND
+ (adj.hold_request_lib IS NULL OR adj.hold_request_lib = ahr_rl.id) AND
+ NOT absolute_adjustment AND
+ COALESCE(acp_cl.id, acn_ol.id, acl_ol.id, ahr_pl.id, ahr_rl.id) IS NOT NULL
+ LOOP
+ baseline_prox := baseline_prox + aoupa.prox_adjustment;
+ END LOOP;
+
+ RETURN baseline_prox;
+END;
+$f$ LANGUAGE PLPGSQL;
+
+COMMIT;