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https://issues.apache.org/jira/browse/HIVE-28528?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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yongzhi.shao updated HIVE-28528:
--------------------------------
Description:
Since we have introduced roaringbitmap dependency in hive-ql module.
Can we take this opportunity to introduce bitmap related UDFs, which can be
used to quickly compute intersection and merger differences, de-duplication
statistics, and other computational needs.
If so, I can do this.
|UDF|desc |demo |result|
|to_bitmap|Convert number (int or bigint) to bitmap|to_bitmap(num)|bitmap|
|bitmap_union|Multiple bitmaps merged into one bitmap
(concatenation)|bitmap_union(bitmap)|bitmap|
|bitmap_count|Calculate the number of elements stored in the
bitmap|bitmap_count(bitmap)|long|
|bitmap_and|Calculate the intersection of two
bitmaps|bitmap_and(bitmap1,bitmap2)|bitmap|
|bitmap_or|Calculate the concatenation of two
bitmaps|bitmap_or(bitmap1,bitmap2)|bitmap|
|bitmap_xor|Calculate the difference between two
bitmaps|bitmap_xor(bitmap1,bitmap2)|bitmap|
|bitmap_from_array|Converting an array to a
bitmap|bitmap_from_array(array)|bitmap|
|bitmap_to_array|Convert bitmap to array|bitmap_to_array(bitmap)|array<bigint>|
|bitmap_contains|Determine if a bitmap contains all the elements of another
bitmap.|bitmap_contains(bitmap1,bitmap2)|boolean|
|bitmap_contains|Determine if a bitmap contains an
element|bitmap_contains(bitmap,num)|boolean|
was:
Since we have introduced roaringbitmap dependency in hive-ql module.
Can we take this opportunity to introduce bitmap related UDFs, which can be
used to quickly compute intersection and merger differences, de-duplication
statistics, and other computational needs.
If so, I can do this.
| UDF | desc | demo | result|
|:-----------------:|:-------------------------------------------------------:|:--------------------------------:|:-------------:|
| to_bitmap | Convert number (int or bigint) to bitmap | to_bitmap(num) |
bitmap |
| bitmap_union | Multiple bitmaps merged into one bitmap (concatenation) |
bitmap_union(bitmap) | bitmap |
| bitmap_count | Calculate the number of elements stored in the bitmap |
bitmap_count(bitmap) | long |
| bitmap_and | Calculate the intersection of two bitmaps |
bitmap_and(bitmap1,bitmap2) | bitmap |
| bitmap_or | Calculate the concatenation of two bitmaps |
bitmap_or(bitmap1,bitmap2) | bitmap |
| bitmap_xor | Calculate the difference between two bitmaps |
bitmap_xor(bitmap1,bitmap2) | bitmap |
| bitmap_from_array | Converting an array to a bitmap |
bitmap_from_array(array) | bitmap |
| bitmap_to_array | Convert bitmap to array | bitmap_to_array(bitmap) |
array<bigint> |
| bitmap_contains | Determine if a bitmap contains all the elements of another
bitmap. | bitmap_contains(bitmap1,bitmap2) | boolean |
| bitmap_contains | Determine if a bitmap contains an element |
bitmap_contains(bitmap,num) | boolean |
> Support Bitmap function
> -----------------------
>
> Key: HIVE-28528
> URL: https://issues.apache.org/jira/browse/HIVE-28528
> Project: Hive
> Issue Type: Improvement
> Security Level: Public(Viewable by anyone)
> Components: UDF
> Affects Versions: 4.0.0
> Reporter: yongzhi.shao
> Priority: Major
>
> Since we have introduced roaringbitmap dependency in hive-ql module.
> Can we take this opportunity to introduce bitmap related UDFs, which can be
> used to quickly compute intersection and merger differences, de-duplication
> statistics, and other computational needs.
> If so, I can do this.
>
>
>
>
> |UDF|desc |demo |result|
> |to_bitmap|Convert number (int or bigint) to bitmap|to_bitmap(num)|bitmap|
> |bitmap_union|Multiple bitmaps merged into one bitmap
> (concatenation)|bitmap_union(bitmap)|bitmap|
> |bitmap_count|Calculate the number of elements stored in the
> bitmap|bitmap_count(bitmap)|long|
> |bitmap_and|Calculate the intersection of two
> bitmaps|bitmap_and(bitmap1,bitmap2)|bitmap|
> |bitmap_or|Calculate the concatenation of two
> bitmaps|bitmap_or(bitmap1,bitmap2)|bitmap|
> |bitmap_xor|Calculate the difference between two
> bitmaps|bitmap_xor(bitmap1,bitmap2)|bitmap|
> |bitmap_from_array|Converting an array to a
> bitmap|bitmap_from_array(array)|bitmap|
> |bitmap_to_array|Convert bitmap to
> array|bitmap_to_array(bitmap)|array<bigint>|
> |bitmap_contains|Determine if a bitmap contains all the elements of another
> bitmap.|bitmap_contains(bitmap1,bitmap2)|boolean|
> |bitmap_contains|Determine if a bitmap contains an
> element|bitmap_contains(bitmap,num)|boolean|
>
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