[GitHub] spark pull request #18046: [SPARK-20749][SQL] Built-in SQL Function Support ...

[viirya <gi...@git.apache.org>]

Github user viirya commented on a diff in the pull request:

    https://github.com/apache/spark/pull/18046#discussion_r117627676
  
    --- Diff: sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/stringExpressions.scala ---
    @@ -1180,6 +1180,60 @@ case class Length(child: Expression) extends UnaryExpression with ImplicitCastIn
     }
     
     /**
    + * A function that return the bit length of the given string or binary expression.
    + */
    +@ExpressionDescription(
    +  usage = "_FUNC_(expr) - Returns the bit length of `expr` or number of bits in binary data.",
    +  extended = """
    +    Examples:
    +      > SELECT _FUNC_('Spark SQL');
    +       9
    --- End diff --
    
    Is it 9 bits?


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