| 类型: | real |
| 默认: | 0.01 |
| 最低限度: | 0 |
| 最大: | 1.79769e+308 |
| 上下文: | user |
| 重新开始: | false |
设置规划器对一次查询中处理每一行的代价估计。默认值是 0.01。
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