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Doc: fix example of recursive query.
Compute total number of sub-parts correctly, per jason@banfelder.net Simon Riggs Discussion: https://postgr.es/m/166161184718.1235920.6304070286124217754@wrigleys.postgresql.org
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@ -2133,7 +2133,7 @@ SELECT sum(n) FROM t;
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WITH RECURSIVE included_parts(sub_part, part, quantity) AS (
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SELECT sub_part, part, quantity FROM parts WHERE part = 'our_product'
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UNION ALL
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SELECT p.sub_part, p.part, p.quantity
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SELECT p.sub_part, p.part, p.quantity * pr.quantity
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FROM included_parts pr, parts p
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WHERE p.part = pr.sub_part
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)
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