Usually, coordinate values are stored in numeric columns (float, decimal, or even integer), and the specific type will not affect the code presented here.

通常，坐标值存储在数字列中(浮点、小数，甚至是整数)，具体的类型并不影响这里给出的代码。

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Numeric long, complex, float, and bool have an explicit adapter, but int lacks any.

float和bool类型的数字有显式的适配器，不过int一个都没有。

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