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| LOCALTIMESTAMP, LOCALTIMESTAMP() | |
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| 返回一组以逗号分隔的字符串,这些字符串由相应的位设定 |
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| 进行阻断,直到副本读取并应用所有更新到指定位置为止 |
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| 一种几何形状的MBR是否在另一种几何形状的MBR内 |
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| 如果第一个操作数匹配第二个操作数JSON数组的任何元素,则返回true (1),否则返回false (0) | |
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| 使用 LineString 值构造 MultiLineString |
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| 使用 Polygon 值构造 MultiPolygon |
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| 将分区划分为N个组(桶),为分区中的每一行分配桶编号,并返回分区中当前行的桶编号。 |
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| 如果 expr1 = expr2,则返回 NULL |
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| 从 LineString 参数构造 Polygon |
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| 分配给当前线程的 Performance Schema 线程 ID | |
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| 分配给指定线程的 Performance Schema 线程 ID | |
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