Sha256: 426a797b9e80ed1c4a85f6c2f199389160a57630f1c5507289031c59ff13eff5
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Versions: 9
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Stored size: 754 Bytes
Contents
module PgHero
module Methods
module Explain
def explain(sql)
sql = squish(sql)
explanation = nil
# use transaction for safety
with_transaction(statement_timeout: (explain_timeout_sec * 1000), rollback: true) do
if (sql.sub(/;\z/, "").include?(";") || sql.upcase.include?("COMMIT")) && !explain_safe?
raise ActiveRecord::StatementInvalid, "Unsafe statement"
end
explanation = select_all("EXPLAIN #{sql}").map { |v| v[:"QUERY PLAN"] }.join("\n")
end
explanation
end
private
def explain_safe?
select_all("SELECT 1; SELECT 1")
false
rescue ActiveRecord::StatementInvalid
true
end
end
end
end
Version data entries
9 entries across 9 versions & 1 rubygems