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inline(expr) – Explodes an array of structs into a table. Platforms: WhereOS, Spark, Hive Class:

inline_outer(expr) – Explodes an array of structs into a table. Platforms: WhereOS, Spark, Hive Class:

expr1 in(expr2, expr3, …) – Returns true if `expr` equals to any valN. Platforms: WhereOS,

indexed_features(double v1, double v2, …) – Returns a list of features as array: [1:v1, 2:v2,

infinity() – Returns the constant representing positive infinity. Platforms: WhereOS, Spark, Hive Class: hivemall.tools.math.InfinityUDF More

if(expr1, expr2, expr3) – If `expr1` evaluates to true, then returns `expr2`; otherwise returns `expr3`.