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@ -79,8 +79,8 @@ GROUP BY
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└─────────────┴──────────┴─────────┘
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```
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### Important note!
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Using multiple `arrayJoin` with same expression may not produce expected results due optimizations.
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For that cases, consider changing array expression that is repeated with extra operations that do not affect join result - e.g. `arrayJoin(arraySort(arr))`, `arrayJoin(arrayConcat(arr, []))`
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Using multiple `arrayJoin` with same expression may not produce expected results due to optimizations.
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For that cases, consider modifying repeated array expression with extra operations that do not affect join result - e.g. `arrayJoin(arraySort(arr))`, `arrayJoin(arrayConcat(arr, []))`
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Example:
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```sql
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