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added comments for bitmapHasAll and bitmapHasAny

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This commit is contained in:
Zhichang Yu 2019-06-05 11:26:13 +08:00
parent ddad564bab
commit 0e3f2d5faa
1 changed files with 6 additions and 0 deletions
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6
dbms/src/Functions/FunctionsBitmap.h
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@ -55,6 +55,12 @@ namespace ErrorCodes
*
* Two bitmap andnot calculation, return cardinality:
* bitmapAndnotCardinality: bitmap,bitmap -> integer
*
* Judge if a bitmap is superset of the another one:
* bitmapHasAll: bitmap,bitmap -> bool
*
* Judge if the intersection of two bitmap is nonempty:
* bitmapHasAny: bitmap,bitmap -> bool
*/
template <typename Name>