groupBitmapOr

Calculations the OR of a bitmap column, return cardinality of type UInt64, if add suffix -State, then return bitmap object. This is equivalent to groupBitmapMerge.

  1. groupBitmapOr(expr)

Parameters

expr – An expression that results in AggregateFunction(groupBitmap, UInt*) type.

Return value

Value of the UInt64 type.

Example

  1. DROP TABLE IF EXISTS bitmap_column_expr_test2;
  2. CREATE TABLE bitmap_column_expr_test2
  3. (
  4.     tag_id String,
  5.     z AggregateFunction(groupBitmap, UInt32)
  6. )
  7. ENGINE = MergeTree
  8. ORDER BY tag_id;
  10. INSERT INTO bitmap_column_expr_test2 VALUES ('tag1', bitmapBuild(cast([1,2,3,4,5,6,7,8,9,10] as Array(UInt32))));
  11. INSERT INTO bitmap_column_expr_test2 VALUES ('tag2', bitmapBuild(cast([6,7,8,9,10,11,12,13,14,15] as Array(UInt32))));
  12. INSERT INTO bitmap_column_expr_test2 VALUES ('tag3', bitmapBuild(cast([2,4,6,8,10,12] as Array(UInt32))));
  14. SELECT groupBitmapOr(z) FROM bitmap_column_expr_test2 WHERE like(tag_id, 'tag%');
  15. ┌─groupBitmapOr(z)─┐
  16. │             15   │
  17. └──────────────────┘
  19. SELECT arraySort(bitmapToArray(groupBitmapOrState(z))) FROM bitmap_column_expr_test2 WHERE like(tag_id, 'tag%');
  20. ┌─arraySort(bitmapToArray(groupBitmapOrState(z)))─┐
  21. │ [1,2,3,4,5,6,7,8,9,10,11,12,13,14,15]           │
  22. └─────────────────────────────────────────────────┘