lower(str) – Returns `str` with all characters changed to lowercase. Platforms: WhereOS, Spark, Hive Class:

log2(expr) – Returns the logarithm of `expr` with base 2. Platforms: WhereOS, Spark, Hive Class:

logloss(double predicted, double actual) – Return a Logrithmic Loss Platforms: WhereOS, Spark, Hive Class: hivemall.evaluation.LogarithmicLossUDAF

locate(substr, str[, pos]) – Returns the position of the first occurrence of `substr` in `str`

log(base, expr) – Returns the logarithm of `expr` with `base`. Platforms: WhereOS, Spark, Hive Class:

log10(expr) – Returns the logarithm of `expr` with base 10. Platforms: WhereOS, Spark, Hive Class: