Thanks, Dudu. Just to re-iterate; the way I'm reading your response is that yes, we can use LOAD INPATH for a PARQUET, PARTITIONED table, provided that the data in the delimited file is properly formatted. Then we can LOAD it into the table (mytable in my example) directly and avoid the creation of the temp table (origtable in my example). Correct so far?
I did not quite follow the latter part of your response: >> You should only create an external table which is an interface to read the files and use it in an INSERT operation. My assumption was that we would LOAD INPATH and not have to use INSERT altogether. Am I missing something in groking this latter part of your response? Thanks, - Dmitry On Tue, Apr 4, 2017 at 11:26 AM, Markovitz, Dudu <dmarkov...@paypal.com> wrote: > Since LOAD DATA INPATH only moves files the answer is very simple. > > If you’re files are already in a format that matches the destination table > (storage type, number and types of columns etc.) then – yes and if not, > then – no. > > > > But – > > You don’t need to load the files into intermediary table. > > You should only create an external table which is an interface to read the > files and use it in an INSERT operation. > > > > Dudu > > > > *From:* Dmitry Goldenberg [mailto:dgoldenb...@hexastax.com] > *Sent:* Tuesday, April 04, 2017 4:52 PM > *To:* user@hive.apache.org > *Subject:* Is it possible to use LOAD DATA INPATH with a PARTITIONED, > STORED AS PARQUET table? > > > > We have a table such as the following defined: > > CREATE TABLE IF NOT EXISTS db.mytable ( > `item_id` string, > `timestamp` string, > `item_comments` string) > PARTITIONED BY (`date`, `content_type`) > STORED AS PARQUET; > > Currently we insert data into this PARQUET, PARTITIONED table as follows, > using an intermediary table: > > INSERT INTO TABLE db.mytable PARTITION(date, content_type) > SELECT itemid as item_id, itemts as timestamp, date, content_type > FROM db.origtable > WHERE date = “${SELECTED_DATE}” > GROUP BY item_id, date, content_type; > > Our question is, would it be possible to use the LOAD DATA INPATH.. INTO > TABLE syntax to load the data from delimited data files into 'mytable' > rather than populating mytable from the intermediary table? > > > > I see in the Hive documentation that: > > * Load operations are currently pure copy/move operations that move > datafiles into locations corresponding to Hive tables. > > * If the table is partitioned, then one must specify a specific partition > of the table by specifying values for all of the partitioning columns. > > > > This seems to indicate that using LOAD is possible; however looking at > this discussion: http://grokbase.com/t/hive/user/114frbfg0y/ > can-i-use-hive-dynamic-partition-while-loading-data-into-tables, perhaps > not? > > > > We'd like to understand if using LOAD in the case of PARQUET, PARTITIONED > tables is possible and if so, then how does one go about using LOAD in that > case? > > > > Thanks, > > - Dmitry > > >
