Doc: fix example of recursive query.

tglsfdc · tglsfdc · commit 2efeb0437cce · 2022-08-28T10:44:53.000-04:00
Compute total number of sub-parts correctly, per jason@banfelder.net Simon Riggs Discussion: https://postgr.es/m/166161184718.1235920.6304070286124217754@wrigleys.postgresql.org
diff --git a/doc/src/sgml/queries.sgml b/doc/src/sgml/queries.sgml
@@ -2129,7 +2129,7 @@ SELECT sum(n) FROM t;
 WITH RECURSIVE included_parts(sub_part, part, quantity) AS (
     SELECT sub_part, part, quantity FROM parts WHERE part = 'our_product'
   UNION ALL
-    SELECT p.sub_part, p.part, p.quantity
+    SELECT p.sub_part, p.part, p.quantity * pr.quantity
     FROM included_parts pr, parts p
     WHERE p.part = pr.sub_part
   )

Original file line number	Diff line number	Diff line change
`@@ -2129,7 +2129,7 @@ SELECT sum(n) FROM t;`
`2129`	`2129`	`WITH RECURSIVE included_parts(sub_part, part, quantity) AS (`
`2130`	`2130`	`SELECT sub_part, part, quantity FROM parts WHERE part = 'our_product'`
`2131`	`2131`	`UNION ALL`
`2132`		`- SELECT p.sub_part, p.part, p.quantity`
	`2132`	`+ SELECT p.sub_part, p.part, p.quantity * pr.quantity`
`2133`	`2133`	`FROM included_parts pr, parts p`
`2134`	`2134`	`WHERE p.part = pr.sub_part`
`2135`	`2135`	`)`