Change to camelCase for arguments

site/_docs/reference.md

@@ -2721,7 +2721,7 @@ In the following:
 | m | expr1 <=> expr2                                | Whether two values are equal, treating null values as the same, and it's similar to `IS NOT DISTINCT FROM`
 | p | ACOSD(numeric)                                 | Returns the inverse cosine of *numeric* in degrees as a double. Returns NaN if *numeric* is NaN. Fails if *numeric* is less than -1.0 or greater than 1.0.
 | * | ACOSH(numeric)                                 | Returns the inverse hyperbolic cosine of *numeric*
-| o s | ADD_MONTHS(date, num_months)                 | Returns the date that is *num_months* after *date*
+| o s | ADD_MONTHS(date, numMonths)                  | Returns the date that is *numMonths* after *date*
 | s | ARRAY([expr [, expr ]*])                       | Construct an array in Apache Spark. The function allows users to use `ARRAY()` to create an empty array
 | s | ARRAY_APPEND(array, element)                   | Appends an *element* to the end of the *array* and returns the result. Type of *element* should be similar to type of the elements of the *array*. If the *array* is null, the function will return null. If an *element* that is null, the null *element* will be added to the end of the *array*
 | s | ARRAY_COMPACT(array)                           | Removes null values from the *array*
@@ -2804,7 +2804,7 @@ In the following:
 | b s | DATE_FROM_UNIX_DATE(integer)                 | Returns the DATE that is *integer* days after 1970-01-01
 | p r | DATE_PART(timeUnit, datetime)                | Equivalent to `EXTRACT(timeUnit FROM  datetime)`
 | b | DATE_ADD(date, interval)                       | Returns the DATE value that occurs *interval* after *date*
-| s | DATE_ADD(date, num_days)                       | Returns the DATE that is *num_days* after *date*
+| s | DATE_ADD(date, numDays)                        | Returns the DATE that is *numDays* after *date*
 | b | DATE_DIFF(date, date2, timeUnit)               | Returns the whole number of *timeUnit* between *date* and *date2*
 | b | DATE_SUB(date, interval)                       | Returns the DATE value that occurs *interval* before *date*
 | b | DATE_TRUNC(date, timeUnit)                     | Truncates *date* to the granularity of *timeUnit*, rounding to the beginning of the unit