First, my apologies, I thought your first question was sent to dev@hive, which is the right list. Hence I've removed dev@community from my reply. If you haven't already you should subscribe to dev@hive.
I'm not 100% sure I understand your question, but here's a place to start. If you do "create table foo..." in SQL that will eventually end up in HiveMetaStore.create_table. This handles checking the table and creating any necessary directories, and then calls RawStore.createTable, which will end up in ObjectStore.createTable. This is where the values you sent in createTable get written down to the RDBMS backing the metadata. I'm not sure that's the answer to the question you were asking or not. Alan. On Mon, Jun 11, 2018 at 12:17 PM Sanchay Javeria <javer...@illinois.edu> wrote: > Hello, > > Thank you. I've also CC'ed @hive.apache.org > > I went through the dev docs on Hive and got an understanding of the > architecture and the high level overview of how a HiveQL query execution > proceeds. To get a better understanding, I decided to add a new field from > a SQL table when a user describes a table by tweaking the hive meta store, > in addition to fields like "Database:", OwnerType:" etc. > > I added a new hook to obtain a connection to a SQL server and placed a > watcher under `startMetaStoreThreads()` in `HiveMetaStore.java`. > I then found `getTableMetaDataInformation()` under > `MetaDataFormatUtils.java` which populates the various fields like > "Database", "OwnerType" etc. by calling getters on the `Table` instance. > > This lead me to `api/Table.java`, auto-generated by the Thrift compiler, > which returns private instances for the getters above. However, I'm unable > to understand how these private variables in `metastore/api/Table.java` > populated? In other words, when we create a new table in Hive, where > exactly is this metadata generated and populated so that it can be later > fetched when describing a table? > > Please let me know if you need any further clarifications on the question! > > On Mon, Jun 11, 2018 at 12:13 PM, Alan Gates <alanfga...@gmail.com> wrote: > > > Yes, this is the place to ask dev questions. > > > > Alan. > > > > On Mon, Jun 11, 2018 at 12:10 PM Sanchay Javeria <javer...@illinois.edu> > > wrote: > > > > > Hi fellow devs, > > > > > > I'm a computer science student at UIUC who just got started with Apache > > > Hive, I'd love to contribute more towards the open JIRA tickets. > > > > > > I had some questions if anyone could help :) I was wondering if this > > > mailing list is the right space to ask dev questions? > > > > > > Thank you, > > > Sanchay > > > > > >
