Vishesh-Tripathi commented on issue #33012:
URL: https://github.com/apache/beam/issues/33012#issuecomment-2575668269
and i am adding this section to explain crossjoin
### What is a Cross-Join?
A cross-join is a Cartesian product operation where each row from one table
is combined with every row from another table. It is useful when we want to
create all possible combinations of two datasets.
**Example:**
- Table A:
| A1 | A2 |
|----|----|
| 1 | X |
| 2 | Y |
- Table B:
| B1 | B2 |
|----|----|
| 10 | P |
| 20 | Q |
**Result of Cross-Join:**
| A1 | A2 | B1 | B2 |
|----|----|----|----|
| 1 | X | 10 | P |
| 1 | X | 20 | Q |
| 2 | Y | 10 | P |
| 2 | Y | 20 | Q |
Cross-joins can be computationally expensive for large datasets, so use them
judiciously.
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