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47 lines
1.5 KiB
Markdown
47 lines
1.5 KiB
Markdown
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---
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toc_priority: 131
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---
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# groupBitmapXor {#groupbitmapxor}
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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).
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``` sql
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groupBitmapOr(expr)
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```
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**Parameters**
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`expr` – An expression that results in `AggregateFunction(groupBitmap, UInt*)` type.
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**Return value**
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Value of the `UInt64` type.
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**Example**
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``` sql
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DROP TABLE IF EXISTS bitmap_column_expr_test2;
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CREATE TABLE bitmap_column_expr_test2
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(
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tag_id String,
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z AggregateFunction(groupBitmap, UInt32)
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)
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ENGINE = MergeTree
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ORDER BY tag_id;
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INSERT INTO bitmap_column_expr_test2 VALUES ('tag1', bitmapBuild(cast([1,2,3,4,5,6,7,8,9,10] as Array(UInt32))));
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INSERT INTO bitmap_column_expr_test2 VALUES ('tag2', bitmapBuild(cast([6,7,8,9,10,11,12,13,14,15] as Array(UInt32))));
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INSERT INTO bitmap_column_expr_test2 VALUES ('tag3', bitmapBuild(cast([2,4,6,8,10,12] as Array(UInt32))));
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SELECT groupBitmapXor(z) FROM bitmap_column_expr_test2 WHERE like(tag_id, 'tag%');
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┌─groupBitmapXor(z)─┐
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│ 10 │
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└───────────────────┘
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SELECT arraySort(bitmapToArray(groupBitmapXorState(z))) FROM bitmap_column_expr_test2 WHERE like(tag_id, 'tag%');
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┌─arraySort(bitmapToArray(groupBitmapXorState(z)))─┐
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│ [1,3,5,6,8,10,11,13,14,15] │
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└──────────────────────────────────────────────────┘
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```
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