soumyava commented on code in PR #15531:
URL: https://github.com/apache/druid/pull/15531#discussion_r1423120922
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docs/querying/math-expr.md:
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@@ -192,7 +192,7 @@ See javadoc of java.lang.Math for detailed explanation for
each function.
| array_set_add_all(arr1,arr2) | combines the unique set of elements of 2
arrays, the resulting array type determined by the type of the first array |
| array_slice(arr,start,end) | return the subarray of arr from the 0 based
index start(inclusive) to end(exclusive), or `null`, if start is less than 0,
greater than length of arr or less than end|
| array_to_string(arr,str) | joins all elements of arr by the delimiter
specified by str |
-| string_to_array(str1,str2) | splits str1 into an array on the delimiter
specified by str2 |
+| string_to_array(str1,str2) | splits str1 into an array on the delimiter
specified by str2, which is a regular expression |
Review Comment:
QQ. Is str2 always a regex ? Or can it can be a delimiter like `,` or `|`. I
see that I can run `select STRING_TO_ARRAY('a,b,c',',')` where str2 is not a
regular expression. If so can we modify this as `splits str1 into an array on
the delimiter specified by str2, which can be a regular expression`
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