groupBitmapAnd 计算位图列的AND,返回UInt64类型的基数,如果添加后缀State,则返回位图对象。 语法 groupBitmapAnd(expr) 参数 expr– 结果为AggregateFunction(groupBitmap, UInt*)类型的表达式。 返回值 UInt64类型的值。 示例 DROPTABLEIFEXISTSbitmap_column_expr_test2;...
groupBitmapAnd(expr) Arguments expr– An expression that results inAggregateFunction(groupBitmap, UInt*)type. Return value Value of theUInt64type. Example DROPTABLEIFEXISTSbitmap_column_expr_test2; CREATETABLEbitmap_column_expr_test2 ( tag_id String, ...
groupBitmapAnd 计算位图列的AND,返回UInt64类型的基数,如果添加后缀State,则返回 位图对象。 语法 ```SQL groupBitmapAnd(expr) </span> **参数** <span style="background-color: var(--ifm-code-background)"><code>expr</code></span> – 结果为 <span style="background-color: var(--ifm-code...
arraySort(bitmapToArray(groupBitmapAndState(uv)))6,arraySort(bitmapToArray(groupBitmapOrState(uv)))7FROM(8SELECT'1'ASid , bitmapBuild(cast([1,2,3,4,5,6,7,8,9,10]asArray(UInt32)))ASuv9UNIONALLSELECT'1'ASid , bitmapBuild(cast([6,7,8,9,10,11,12,13,14,15]asArray...
该表引擎继承自MergeTree，可以使用 AggregatingMergeTree 表来做增量数据统计聚合。如果要按一组规则来合并...
A.P. Buchmann, M.C. Wu, Supporting Group-By and Pipelining in Bitmap-Enabled Query Processors, Proc. of the 6th Conference on Current Trends in Theory and Practice of Informatics (SOFSEM), Milovy, Czech Republic, (also in Lecture Notes in Computer Science, Vol. 1725, Springer), 1999....
SOFSEM'99 : Theory and practice of informatics: 26th conference on current trends in theory and practice of informatic, November 27-December 4, 1999, Milovy, Czech RepublicA.P. Buchmann, M.C. Wu, Supporting Group-By and Pipelining in Bitmap-Enabled Query Processors, Proc. of the 6th ...