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FIX database growth when running the PeriodicalUpdates job

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Régis Hanol 2013-10-01 17:11:13 +02:00
parent 75a8dfc467
commit 01075c5e7a
1 changed files with 7 additions and 8 deletions
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15
lib/score_calculator.rb
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@ -22,7 +22,6 @@ class ScoreCalculator
exec_sql(post_score_sql, @weightings) exec_sql(post_score_sql, @weightings)
# Update the percent rankings of the posts # Update the percent rankings of the posts
exec_sql("UPDATE posts SET percent_rank = x.percent_rank exec_sql("UPDATE posts SET percent_rank = x.percent_rank
FROM (SELECT id, percent_rank() FROM (SELECT id, percent_rank()
OVER (PARTITION BY topic_id ORDER BY SCORE DESC) as percent_rank OVER (PARTITION BY topic_id ORDER BY SCORE DESC) as percent_rank
@ -73,12 +72,12 @@ class ScoreCalculator
# Generate a SQL statement to update the scores of all posts # Generate a SQL statement to update the scores of all posts
def post_score_sql def post_score_sql
"UPDATE posts SET score = ".tap do |sql| components = []
components = [] @weightings.keys.each { |k| components << "COALESCE(#{k.to_s}, 0) * :#{k.to_s}" }
@weightings.keys.each do |k| components = components.join(" + ")
components << "COALESCE(#{k.to_s}, 0) * :#{k.to_s}"
end "UPDATE posts SET score = x.score
sql << components.join(" + ") FROM (SELECT id, #{components} as score FROM posts) AS x
end WHERE x.id = posts.id AND (posts.score IS NULL OR x.score <> posts.score)"
end end
end end