Do not report ERROR when sample rate equals 100
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		@ -117,7 +117,7 @@ int ObLogLimit::do_re_est_cost(EstimateCostInfo ¶m, double &card, double &op
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      if (OB_FAIL(child->re_est_cost(param, child_card, child_cost))) {
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        LOG_WARN("failed to re-est cost", K(ret));
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      } else {
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        op_cost = ObOptEstCost::cost_get_rows(child_card, opt_ctx);
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        op_cost = ObOptEstCost::cost_get_rows(child_card, opt_ctx.get_cost_model_type());
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        cost = op_cost + child_cost;
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        child_card = 0 <= limit_percent
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                     ? std::max(child_card * limit_percent / 100 - offset_count, 0.0)
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