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* prefer relative links from root * wip * split aggregate function reference * split system tables
47 lines
1.6 KiB
Markdown
47 lines
1.6 KiB
Markdown
---
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toc_priority: 130
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---
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# groupBitmapOr {#groupbitmapor}
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Calculations the OR of a bitmap column, return cardinality of type UInt64, if add suffix -State, then return [bitmap object](../../../sql-reference/functions/bitmap-functions.md). This is equivalent to `groupBitmapMerge`.
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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 groupBitmapOr(z) FROM bitmap_column_expr_test2 WHERE like(tag_id, 'tag%');
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┌─groupBitmapOr(z)─┐
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│ 15 │
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└──────────────────┘
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SELECT arraySort(bitmapToArray(groupBitmapOrState(z))) FROM bitmap_column_expr_test2 WHERE like(tag_id, 'tag%');
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┌─arraySort(bitmapToArray(groupBitmapOrState(z)))─┐
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│ [1,2,3,4,5,6,7,8,9,10,11,12,13,14,15] │
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└─────────────────────────────────────────────────┘
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```
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