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Update docs/en/sql-reference/functions/array-functions.md

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Co-authored-by: Kruglov Pavel <48961922+Avogar@users.noreply.github.com>
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docs/en/sql-reference/functions/array-functions.md
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@ -15,7 +15,7 @@ Checks whether the input array is empty.
empty([x])
```
An array is considered empty if it contains all empty elements.
An array is considered empty if it does not contain any elements.
!!! note "Note"
Can be optimized by enabling the [optimize_functions_to_subcolumns](../../operations/settings/settings.md#optimize-functions-to-subcolumns) setting. With `optimize_functions_to_subcolumns = 1` the function reads only [size0](../../sql-reference/data-types/array.md#array-size) subcolumn instead of reading and processing the whole array column. The query `SELECT empty(arr) FROM TABLE;` transforms to `SELECT arr.size0 = 0 FROM TABLE;`.