Yes Lefty is completely right, the sentence unfortunately came out like some strange regex.
Thanks Szehon On Tue, Mar 18, 2014 at 12:29 AM, Lefty Leverenz <leftylever...@gmail.com>wrote: > > What is "select *?" ? > > I think he just meant "select *" and ended the suggestion with a question > mark. > > Admittedly, "select *?" looks like syntax with an extra wildcard. > > -- Lefty > > > On Tue, Mar 18, 2014 at 3:07 AM, Szehon Ho <sze...@cloudera.com> wrote: > >> You can try to check other string udf's for that case, here >> https://cwiki.apache.org/confluence/display/Hive/LanguageManual+UDF , >> they will be in the section on string functions. >> >> Thanks >> Szehon >> >> >> On Mon, Mar 17, 2014 at 5:06 PM, Frank Luo <j...@merkleinc.com> wrote: >> >>> That is helpful, Thx! >>> >>> >>> >>> More dumb questions. What is "select *?" ? >>> >>> >>> >>> Also, any hints on how to find whether the map_keys contains a >>> substring? For example, supposing the map_keys contains emails, I want to >>> see if one of the emails contains "gmail.com". >>> >>> >>> >>> *From:* Szehon Ho [mailto:sze...@cloudera.com] >>> *Sent:* Monday, March 17, 2014 5:14 PM >>> *To:* user@hive.apache.org >>> *Subject:* Re: read a Hive Map without knowing keys >>> >>> >>> >>> Select *? There are other built-in functions like map_keys and >>> map_values you can use in queries on maps. Not sure if this addresses the >>> question. >>> >>> Thanks >>> Szehon >>> >>> >>> >>> On Mon, Mar 17, 2014 at 3:05 PM, Frank Luo <j...@merkleinc.com> wrote: >>> >>> Is there a way to read Hive Map datatype without knowing keys? >>> >>> >>> >>> According to Hive document, the only way to read a Map is to access >>> through keys, ie: myMap['myKey']. However, in many cases, the keys are >>> unknown, for example, HTable sparse columns, so in that kind of situation, >>> what is the ways to read the map? >>> >>> >>> >> >> >
