mirror of
https://github.com/ClickHouse/ClickHouse.git
synced 2024-12-12 09:22:05 +00:00
47 lines
1.5 KiB
Markdown
47 lines
1.5 KiB
Markdown
---
|
||
sidebar_position: 131
|
||
---
|
||
|
||
# groupBitmapXor
|
||
|
||
Calculations the XOR of a bitmap column, return cardinality of type UInt64, if add suffix -State, then return [bitmap object](../../../sql-reference/functions/bitmap-functions.md).
|
||
|
||
``` sql
|
||
groupBitmapOr(expr)
|
||
```
|
||
|
||
**Arguments**
|
||
|
||
`expr` – An expression that results in `AggregateFunction(groupBitmap, UInt*)` type.
|
||
|
||
**Returned value**
|
||
|
||
Value of the `UInt64` type.
|
||
|
||
**Example**
|
||
|
||
``` sql
|
||
DROP TABLE IF EXISTS bitmap_column_expr_test2;
|
||
CREATE TABLE bitmap_column_expr_test2
|
||
(
|
||
tag_id String,
|
||
z AggregateFunction(groupBitmap, UInt32)
|
||
)
|
||
ENGINE = MergeTree
|
||
ORDER BY tag_id;
|
||
|
||
INSERT INTO bitmap_column_expr_test2 VALUES ('tag1', bitmapBuild(cast([1,2,3,4,5,6,7,8,9,10] as Array(UInt32))));
|
||
INSERT INTO bitmap_column_expr_test2 VALUES ('tag2', bitmapBuild(cast([6,7,8,9,10,11,12,13,14,15] as Array(UInt32))));
|
||
INSERT INTO bitmap_column_expr_test2 VALUES ('tag3', bitmapBuild(cast([2,4,6,8,10,12] as Array(UInt32))));
|
||
|
||
SELECT groupBitmapXor(z) FROM bitmap_column_expr_test2 WHERE like(tag_id, 'tag%');
|
||
┌─groupBitmapXor(z)─┐
|
||
│ 10 │
|
||
└───────────────────┘
|
||
|
||
SELECT arraySort(bitmapToArray(groupBitmapXorState(z))) FROM bitmap_column_expr_test2 WHERE like(tag_id, 'tag%');
|
||
┌─arraySort(bitmapToArray(groupBitmapXorState(z)))─┐
|
||
│ [1,3,5,6,8,10,11,13,14,15] │
|
||
└──────────────────────────────────────────────────┘
|
||
```
|