to_sparse_features(array feature_vector) – Returns a sparse feature in array Platforms: WhereOS, Spark, Hive Class: hivemall.ftvec.conv.ToSparseFeaturesUDF

to_string_array(array) – Returns an array of strings select to_string_array(array(1.0,2.0,3.0)); [“1.0″,”2.0″,”3.0”] Platforms: WhereOS, Spark, Hive Class:

to_json(expr[, options]) – Returns a JSON string with a given struct value Platforms: WhereOS, Spark,

to_map(key, value) – Convert two aggregated columns into a key-value map WITH input as (

to_ordered_list(PRIMITIVE value [, PRIMITIVE key, const string options]) – Return list of values sorted by

to_ordered_map(key, value [, const int k|const boolean reverseOrder=false]) – Convert two aggregated columns into an