address comments.

Author: gatorsmile

R/pkg/R/functions.R

@@ -1026,7 +1026,9 @@ setMethod("last_day",
           })
 
 #' @details
-#' \code{length}: Computes the length of a given string or binary column.
+#' \code{length}: Computes the character length of a given string or number of bytes
+#' of a binary string. The length of character strings include the trailing spaces.
+#' The length of binary strings includes binary zeros.
 #'
 #' @rdname column_string_functions
 #' @aliases length length,Column-method

python/pyspark/sql/functions.py

@@ -1705,7 +1705,7 @@ def unhex(col):
 @ignore_unicode_prefix
 @since(1.5)
 def length(col):
-    """Computes the character length of a given string or number of bytes or a binary string.
+    """Computes the character length of a given string or number of bytes of a binary string.
     The length of character strings include the trailing spaces. The length of binary strings
     includes binary zeros.
 

sql/core/src/main/scala/org/apache/spark/sql/functions.scala

@@ -2267,7 +2267,7 @@ object functions {
   }
 
   /**
-   * Computes the character length of a given string or number of bytes or a binary string.
+   * Computes the character length of a given string or number of bytes of a binary string.
    * The length of character strings include the trailing spaces. The length of binary strings
    * includes binary zeros.
    *