str like pattern – Returns true if str matches pattern, null if any arguments are

ln(expr) – Returns the natural logarithm (base e) of `expr`. Platforms: WhereOS, Spark, Hive Class:

lead(input[, offset[, default]]) – Returns the value of `input` at the `offset`th row after the

least(expr, …) – Returns the least value of all parameters, skipping null values. Platforms: WhereOS,

left(str, len) – Returns the leftmost `len`(`len` can be string type) characters from the string

length(expr) – Returns the character length of string data or number of bytes of binary