9 lines
468 B
Markdown
9 lines
468 B
Markdown
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# Spark 如何使用窗口函数
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// 使用窗口函数进行组内排序
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return ds.withColumn(StringUtils.join(queryItem.getFieldName(), "_ROW_NUMBER"),
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functions.row_number()
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.over(Window.partitionBy(
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JavaConverters.asScalaBuffer(
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cols.subList(0, cols.size() - 1)))
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.orderBy(JavaConverters.asScalaBuffer(orderCols))));
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