• 用于INSERTUPDATE操作构造索引的键生成器函数

    Key generator function to construct index key during INSERT and UPDATE operations.

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  • 示例展示如何面积创建函数索引

    This example shows how to create a functional index on the area of a circle.

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  • 函数索引存储维护成本较高

    The cost for storage and maintenance of a functional index can be high.

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  • 示例使用r - Tree访问方法函数索引

    Example: Functional index using R-Tree access method.

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  • 函数索引一种强大的性能调优工具

    Functional indexes can be a powerful performance tuning tool.

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  • 示例面积执行函数索引

    Example: Functional index on the area of a circle

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  • 示例图像平均RG b执行函数索引

    Example: Functional index on the average RGB values of an image.

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  • 外部函数从某个索引开始进行筛选。 只考虑第一次匹配的结果。

    Find the index of the first matching Record in this Store by a function.

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  • 指数函数返回基于提供列表索引

    The Index function returns the index based upon the list you provide.

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  • 将在谓词函数逻辑使用每个元素索引

    Each element's index is used in the logic of the predicate function.

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  • 将在谓词函数逻辑使用每个元素索引

    Each element's index is used in the logic of the predicate function.

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