Rename variable in recursive CTEs in SQL queries: s/depth/level/g

Author: szarnyasg

postgres/queries/interactive-complex-13.sql

@@ -1,8 +1,8 @@
-WITH RECURSIVE search_graph(link, depth, path) AS (
+WITH RECURSIVE search_graph(link, level, path) AS (
 		SELECT :person1Id::bigint, 0, ARRAY[:person1Id::bigint]::bigint[]
       UNION ALL
-      	(WITH sg(link,depth) as (select * from search_graph) -- Note: sg is only the diff produced in the previous iteration
-      	SELECT distinct k_person2id, x.depth+1, array_append(path, k_person2id)
+      	(WITH sg(link,level) as (select * from search_graph) -- Note: sg is only the diff produced in the previous iteration
+      	SELECT distinct k_person2id, x.level+1, array_append(path, k_person2id)
       	FROM knows, sg x
       	WHERE 1=1
 		  and x.link = k_person1id
@@ -13,6 +13,6 @@ WITH RECURSIVE search_graph(link, depth, path) AS (
 		  and not exists(select * from sg y where y.link = k_person2id)
 		)
 )
-select max(depth) from (
-select depth from search_graph where link = :person2Id::bigint
+select max(level) from (
+select level from search_graph where link = :person2Id::bigint
 union select -1) tmp;

postgres/queries/interactive-complex-14.sql

@@ -3,11 +3,11 @@ WITH start_node(v) AS (
 )
 select * from (
 	WITH RECURSIVE
-	search_graph(link, depth, path) AS (
+	search_graph(link, level, path) AS (
 	        (SELECT v::bigint, 0, ARRAY[]::bigint[][] from start_node)
 	      UNION ALL
-	        (WITH sg(link,depth) as (select * from search_graph)
-	        SELECT distinct k_person2id, x.depth + 1,path || ARRAY[[x.link, k_person2id]]
+	        (WITH sg(link,level) as (select * from search_graph)
+	        SELECT distinct k_person2id, x.level + 1,path || ARRAY[[x.link, k_person2id]]
 	        FROM knows, sg x
 	        WHERE x.link = k_person1id and not exists(select * from sg y where y.link = :person2Id::bigint) and not exists( select * from sg y where y.link=k_person2id)
 	        )