ClickHouse/docs/ja/sql-reference/aggregate-functions/reference/groupbitmapand.md

slug	sidebar_position	title
/ja/sql-reference/aggregate-functions/reference/groupbitmapand	149	groupBitmapAnd

ビットマップカラムのAND計算を行い、戻り値はUInt64型の基数を返します。サフィックス-Stateを付加すると、ビットマップオブジェクトを返します。

groupBitmapAnd(expr)

引数

expr – AggregateFunction(groupBitmap, UInt*)型になる式。

戻り値

UInt64型の値。

例

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 groupBitmapAnd(z) FROM bitmap_column_expr_test2 WHERE like(tag_id, 'tag%');
┌─groupBitmapAnd(z)─┐
│               3   │
└───────────────────┘

SELECT arraySort(bitmapToArray(groupBitmapAndState(z))) FROM bitmap_column_expr_test2 WHERE like(tag_id, 'tag%');
┌─arraySort(bitmapToArray(groupBitmapAndState(z)))─┐
│ [6,8,10]                                         │
└──────────────────────────────────────────────────┘