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1.5 KiB
1.5 KiB
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131 |
groupBitmapXor
Calculations the XOR of a bitmap column, return cardinality of type UInt64, if add suffix -State, then return bitmap object.
groupBitmapOr(expr)
Arguments
expr
– An expression that results in AggregateFunction(groupBitmap, UInt*)
type.
Return value
Value of the UInt64
type.
Example
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] │
└──────────────────────────────────────────────────┘