-About Usage of Hive Index
Lin 2012-08-07, 23:50
When I try to use Hive Indexing, I have the following questions.
1. Does Indexing have the same performance on both the partitioned and
non-partitioned tables? How about bucketed and un-bucked tables?
2. Is it possible for us to build index of function of indexed columns,
create index x on my_table(my_function_1(col1, col2, ...),
my_function_2(col1, col2, ...), ...)?
3. If we try to use the non-indexed columns in base table, can we use the
index table to speed up the query? join?
Any suggestions? Thanks in advance.