[HIVE-4590] HCatalog documentation example is wrong

• Type: Bug
• Status: Open
• Priority: Minor
• Resolution: Unresolved
• Affects Version/s: 0.10.0
• Component/s: Documentation, HCatalog
• Assignee: Lefty Leverenz
• Reporter: Eugene Koifman
• Created: 22/May/13 18:32
• Updated: 21/Jul/14 17:45

Description

http://hive.apache.org/docs/hcat_r0.5.0/inputoutput.html#Read+Example
reads

The following very simple MapReduce program reads data from one table which it assumes to have an integer in the second column, and counts how many different values it sees. That is, it does the equivalent of "select col1, count from $table group by col1;".

The description of the query is wrong. It actually counts how many instances of each distinct value it find. For example, if values of col1 are {1,1,1,3,3,3,5) it will produce
1, 3
3, 2,
5, 1