I believe I tried that, both in the return argument and the outer query. If
memory serves me, I got an error about the array index needing to be a
constant value.
I will try again when I get back to a computer.
Sent from my iPhone
On Aug 21, 2013, at 6:48 PM, Harish Butani <hbut...@hortonworks.com> wrote:
Can you try this:
select search_terms, productid, clicks_to_product from npath ( on clicks
distributed by sessionid sort by timestamp
arg1('SEARCH.NOTPRODUCT*.PRODUCT'),
arg2('SEARCH'), arg3(page = 'SEARCH'),
arg4('PRODUCT'), arg5(page = 'PRODUCT'),
arg5('NOTPRODUCT'), arg5(page != 'PRODUCT'),
arg6('search_terms, (size(tpath)-1) as clicks_to_product,
tpath[size(tpath) -1].productid as productid')
);
- added NOTPRODUCT to capture clicks between SEARCH and PRODUCT
- you don't need first_value for search_terms, because you are getting the
row back starting at which the Pattern matches.
- to get the last_value, i am hoping this works: tpath[size(tpath)
-1].productid
On Aug 21, 2013, at 12:25 PM, Justin Workman <justinjwork...@gmail.com>
wrote:
Assuming click stream type of data I want to get the search terms from the
first search request, and return the product id that was eventually viewed
and the number of clicks to the product. So something like this
select search_terms, productid, clicks_to_product from npath ( on clicks
distributed by sessionid sort by timestamp
arg1('SEARCH.PRODUCT'),
arg2('SEARCH'), arg3(page = 'SEARCH'),
arg4('PRODUCT'), arg5([age = 'PRODUCT'),
arg6('first_value(search_terms) as search_terms,
last_value(productid) as productid, (size(tpath)-1) as clicks_to_product')
);
>From what I have seen, I will get the search terms from the first search
without the first_value, however it would be nice to be able to use
first_value to guarantee that. I cannot get the productid from the last
tpath object using this. I did try and get the last_value(tpath.productid)
in the outer query, however that returned the productid ( and all nulls
leading up to the product viewed page) in the very tpath value for the very
last row returned from the inner npath select, eg not the last value for
the productid for that row. I can use tpath.productid in place of productid
in the outer query and it returns the nulls for each row in the current
tpath, upto the final product view.
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