How to convert Array to String in Hive0.7

[lxw]

Hi, all :

    How to convert Array to String in Hive0.7?

    concat_ws(string SEP, array<string>)   Like concat_ws() above, but taking 
an array of strings. (as of Hive 0.9.0) 
    
    this function was not supported,who can help me?


thanks!